Component

Lactoperoxidase enzyme family

Cross-species LPO family. Abstract-only records with unresolved preparation species do not assert the human isoform was tested.

15 recorded relationships. Experimental role, claim status and evidence remain attached to each record.

How nutrients influence it

Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.

How nutrients reach it in more than one step

Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.

Tracing routes…

What it does

Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.

Recorded relationships

What it acts on

  1. Peroxide-preincubated LPO exposed to iodide yielded a crystal complex containing hypoiodite in its substrate channel.

    Lactoperoxidase enzyme family → Hypoiodite ion (OI−) source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Structural/biochemical model; enzyme species not assigned from abstract. Cofactor chemistry does not establish dietary iron responsiveness.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    The oxidized iodine product was observed structurally.
    primary_references
    Structural evidence of the oxidation of iodide ion into hyper-reactive hypoiodite ion by mammalian heme lactoperoxidase. · 2022 · https://pubmed.ncbi.nlm.nih.gov/34761444/ · DOI 10.1002/pro.4230

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 232–238

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI. · source_derived_draft · unverified_draft

    ## ki-lpo-product The oxidized iodine product was observed structurally. Peroxide-preincubated LPO exposed to iodide yielded a crystal complex containing hypoiodite in its substrate channel. Model: Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI. Limitations: Structural/biochemical model; enzyme species not assigned from abstract. Cofactor chemistry does not establish dietary iron responsiveness. Evidence location: Primary abstract Structural evidence of the oxidation of iodide ion into hyper-reactive hypoiodite ion by mammalian heme lactoperoxidase. · 2022 · https://pubmed.ncbi.nlm.nih.gov/34761444/ · DOI 10.1002/pro.4230
    Complete structured claim and evidence

What acts on it

  1. The LPO structure contains covalently attached heme; peroxide sits between its iron and distal His109.

    Heme → Lactoperoxidase enzyme family source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Structural/biochemical model; enzyme species not assigned from abstract. Cofactor chemistry does not establish dietary iron responsiveness.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    Iron-containing heme positions peroxide in the enzyme.
    primary_references
    Structure of a ternary complex of lactoperoxidase with iodide and hydrogen peroxide at 1.77 Å resolution. · 2021 · https://pubmed.ncbi.nlm.nih.gov/33882424/ · DOI 10.1016/j.jinorgbio.2021.111461

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 216–222

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI. · source_derived_draft · unverified_draft

    ## ki-lpo-heme Iron-containing heme positions peroxide in the enzyme. The LPO structure contains covalently attached heme; peroxide sits between its iron and distal His109. Model: Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI. Limitations: Structural/biochemical model; enzyme species not assigned from abstract. Cofactor chemistry does not establish dietary iron responsiveness. Evidence location: Primary abstract Structure of a ternary complex of lactoperoxidase with iodide and hydrogen peroxide at 1.77 Å resolution. · 2021 · https://pubmed.ncbi.nlm.nih.gov/33882424/ · DOI 10.1016/j.jinorgbio.2021.111461
    Complete structured claim and evidence

Where it participates (unsigned role)

  1. Replacing thiocyanate with iodide in the LPO/H2O2 system reduced adenovirus transduction.

    Iodide ion → Adenovirus transduction source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Primary airway epithelial cultures and human oral-KI exposure; separate experimental arms.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Culture antiviral activity and human secretion measurements do not establish prevention or treatment of human infection.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    Changing the enzyme substrate changed antiviral activity.
    primary_references
    Enhancement of respiratory mucosal antiviral defenses by the oxidation of iodide. · 2011 · https://pubmed.ncbi.nlm.nih.gov/21441383/ · DOI 10.1165/rcmb.2010-0329oc

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 72–78

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Primary airway epithelial cultures and human oral-KI exposure; separate experimental arms. · source_derived_draft · unverified_draft

    ## ki-air-adeno Changing the enzyme substrate changed antiviral activity. Replacing thiocyanate with iodide in the LPO/H2O2 system reduced adenovirus transduction. Model: Primary airway epithelial cultures and human oral-KI exposure; separate experimental arms. Limitations: Culture antiviral activity and human secretion measurements do not establish prevention or treatment of human infection. Evidence location: Primary abstract Enhancement of respiratory mucosal antiviral defenses by the oxidation of iodide. · 2011 · https://pubmed.ncbi.nlm.nih.gov/21441383/ · DOI 10.1165/rcmb.2010-0329oc
    Complete structured claim and evidence
  2. Differentiated airway epithelia supplied sufficient peroxide for antiviral activity when LPO and iodide were added.

    Experimental context and source evidence
    experimental_model
    Primary airway epithelial cultures and human oral-KI exposure; separate experimental arms.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Culture antiviral activity and human secretion measurements do not establish prevention or treatment of human infection.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    Airway cells supplied the oxidant needed by the enzyme.
    primary_references
    Enhancement of respiratory mucosal antiviral defenses by the oxidation of iodide. · 2011 · https://pubmed.ncbi.nlm.nih.gov/21441383/ · DOI 10.1165/rcmb.2010-0329oc

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 88–94

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Primary airway epithelial cultures and human oral-KI exposure; separate experimental arms. · source_derived_draft · unverified_draft

    ## ki-air-peroxide Airway cells supplied the oxidant needed by the enzyme. Differentiated airway epithelia supplied sufficient peroxide for antiviral activity when LPO and iodide were added. Model: Primary airway epithelial cultures and human oral-KI exposure; separate experimental arms. Limitations: Culture antiviral activity and human secretion measurements do not establish prevention or treatment of human infection. Evidence location: Primary abstract Enhancement of respiratory mucosal antiviral defenses by the oxidation of iodide. · 2011 · https://pubmed.ncbi.nlm.nih.gov/21441383/ · DOI 10.1165/rcmb.2010-0329oc
    Complete structured claim and evidence
  3. The LPO/iodide/H2O2 system reduced RSV titre; the tested thiocyanate system did not inactivate RSV or adenovirus.

    Iodide ion → Respiratory syncytial virus infectivity source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Primary airway epithelial cultures and human oral-KI exposure; separate experimental arms.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Culture antiviral activity and human secretion measurements do not establish prevention or treatment of human infection.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    Iodide and thiocyanate were not interchangeable against these viruses.
    primary_references
    Enhancement of respiratory mucosal antiviral defenses by the oxidation of iodide. · 2011 · https://pubmed.ncbi.nlm.nih.gov/21441383/ · DOI 10.1165/rcmb.2010-0329oc

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 80–86

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Primary airway epithelial cultures and human oral-KI exposure; separate experimental arms. · source_derived_draft · unverified_draft

    ## ki-air-rsv Iodide and thiocyanate were not interchangeable against these viruses. The LPO/iodide/H2O2 system reduced RSV titre; the tested thiocyanate system did not inactivate RSV or adenovirus. Model: Primary airway epithelial cultures and human oral-KI exposure; separate experimental arms. Limitations: Culture antiviral activity and human secretion measurements do not establish prevention or treatment of human infection. Evidence location: Primary abstract Enhancement of respiratory mucosal antiviral defenses by the oxidation of iodide. · 2011 · https://pubmed.ncbi.nlm.nih.gov/21441383/ · DOI 10.1165/rcmb.2010-0329oc
    Complete structured claim and evidence
  4. Iodide substituted for thiocyanate in LPO/H2O2-dependent glutathione oxidation; chloride and bromide were ineffective substitutes.

    Iodide ion → GSH source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Purified biochemical reaction; GSH measured by amperometric titration.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    No demonstration that ordinary KI intake depletes human glutathione.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    This iodine chemistry can consume glutathione in a test system.
    primary_references
    Free radical generation and coupled thiol oxidation by lactoperoxidase/SCN-/H2O2. · 1992 · https://pubmed.ncbi.nlm.nih.gov/1324202/ · DOI 10.1016/0891-5849(92)90014-8

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 248–254

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Purified biochemical reaction; GSH measured by amperometric titration. · source_derived_draft · unverified_draft

    ## ki-gsh This iodine chemistry can consume glutathione in a test system. Iodide substituted for thiocyanate in LPO/H2O2-dependent glutathione oxidation; chloride and bromide were ineffective substitutes. Model: Purified biochemical reaction; GSH measured by amperometric titration. Limitations: No demonstration that ordinary KI intake depletes human glutathione. Evidence location: Primary abstract Free radical generation and coupled thiol oxidation by lactoperoxidase/SCN-/H2O2. · 1992 · https://pubmed.ncbi.nlm.nih.gov/1324202/ · DOI 10.1016/0891-5849(92)90014-8
    Complete structured claim and evidence
  5. Inhibiting LPO activity increased lung lesions, RSV mRNA and antigen in the lamb experiment.

    Experimental context and source evidence
    experimental_model
    Newborn and three-week-old lamb RSV experiments; oral KI given by intragastric gavage.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Animal disease model; no human antiviral efficacy established. LPO inhibition supports pathway involvement, not an exclusively LPO mechanism.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    Blocking the enzyme weakened protection.
    primary_references
    Increased concentration of iodide in airway secretions is associated with reduced respiratory syncytial virus disease severity. · 2014 · https://pubmed.ncbi.nlm.nih.gov/24053146/ · DOI 10.1165/rcmb.2012-0529oc

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 120–126

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Newborn and three-week-old lamb RSV experiments; oral KI given by intragastric gavage. · source_derived_draft · unverified_draft

    ## ki-lamb-lpo-block Blocking the enzyme weakened protection. Inhibiting LPO activity increased lung lesions, RSV mRNA and antigen in the lamb experiment. Model: Newborn and three-week-old lamb RSV experiments; oral KI given by intragastric gavage. Limitations: Animal disease model; no human antiviral efficacy established. LPO inhibition supports pathway involvement, not an exclusively LPO mechanism. Evidence location: Primary abstract Increased concentration of iodide in airway secretions is associated with reduced respiratory syncytial virus disease severity. · 2014 · https://pubmed.ncbi.nlm.nih.gov/24053146/ · DOI 10.1165/rcmb.2012-0529oc
    Complete structured claim and evidence
  6. H2O2 formed LPO compound I with second-order rate constant (1.1 ± 0.1) × 10^7 M−1 s−1.

    Hydrogen peroxide → Lactoperoxidase compound I source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Purified LPO transient kinetics; pH 7, 15 °C; preparation species unresolved in abstract.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Purified enzyme kinetics; concentrations, substrate competition and reaction order determine relevance in tissues.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    Peroxide activates the enzyme before iodide oxidation.
    primary_references
    Reaction of lactoperoxidase compound I with halides and thiocyanate. · 2002 · https://pubmed.ncbi.nlm.nih.gov/12269834/ · DOI 10.1021/bi026326x

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 184–190

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Purified LPO transient kinetics; pH 7, 15 °C; preparation species unresolved in abstract. · source_derived_draft · unverified_draft

    ## ki-lpo-activate Peroxide activates the enzyme before iodide oxidation. H2O2 formed LPO compound I with second-order rate constant (1.1 ± 0.1) × 10^7 M−1 s−1. Model: Purified LPO transient kinetics; pH 7, 15 °C; preparation species unresolved in abstract. Limitations: Purified enzyme kinetics; concentrations, substrate competition and reaction order determine relevance in tissues. Evidence location: Primary abstract Reaction of lactoperoxidase compound I with halides and thiocyanate. · 2002 · https://pubmed.ncbi.nlm.nih.gov/12269834/ · DOI 10.1021/bi026326x
    Complete structured claim and evidence
  7. Hypoiodite occupied the distal heme cavity; ABTS activity experiments supported product inhibition.

    Experimental context and source evidence
    experimental_model
    Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Structural/biochemical model; enzyme species not assigned from abstract. Cofactor chemistry does not establish dietary iron responsiveness.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    The enzyme product can limit further enzyme activity.
    primary_references
    Structural evidence of the oxidation of iodide ion into hyper-reactive hypoiodite ion by mammalian heme lactoperoxidase. · 2022 · https://pubmed.ncbi.nlm.nih.gov/34761444/ · DOI 10.1002/pro.4230

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 240–246

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI. · source_derived_draft · unverified_draft

    ## ki-lpo-feedback The enzyme product can limit further enzyme activity. Hypoiodite occupied the distal heme cavity; ABTS activity experiments supported product inhibition. Model: Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI. Limitations: Structural/biochemical model; enzyme species not assigned from abstract. Cofactor chemistry does not establish dietary iron responsiveness. Evidence location: Primary abstract Structural evidence of the oxidation of iodide ion into hyper-reactive hypoiodite ion by mammalian heme lactoperoxidase. · 2022 · https://pubmed.ncbi.nlm.nih.gov/34761444/ · DOI 10.1002/pro.4230
    Complete structured claim and evidence
  8. Iodide reduced LPO compound I to native enzyme at (1.2 ± 0.04) × 10^8 M−1 s−1.

    Iodide ion → Lactoperoxidase compound I source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Purified LPO transient kinetics; pH 7, 15 °C; preparation species unresolved in abstract.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Purified enzyme kinetics; concentrations, substrate competition and reaction order determine relevance in tissues.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    Iodide supplies electrons to activated lactoperoxidase.
    primary_references
    Reaction of lactoperoxidase compound I with halides and thiocyanate. · 2002 · https://pubmed.ncbi.nlm.nih.gov/12269834/ · DOI 10.1021/bi026326x

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 192–198

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Purified LPO transient kinetics; pH 7, 15 °C; preparation species unresolved in abstract. · source_derived_draft · unverified_draft

    ## ki-lpo-iodide Iodide supplies electrons to activated lactoperoxidase. Iodide reduced LPO compound I to native enzyme at (1.2 ± 0.04) × 10^8 M−1 s−1. Model: Purified LPO transient kinetics; pH 7, 15 °C; preparation species unresolved in abstract. Limitations: Purified enzyme kinetics; concentrations, substrate competition and reaction order determine relevance in tissues. Evidence location: Primary abstract Reaction of lactoperoxidase compound I with halides and thiocyanate. · 2002 · https://pubmed.ncbi.nlm.nih.gov/12269834/ · DOI 10.1021/bi026326x
    Complete structured claim and evidence
  9. Thiocyanate reacted with LPO compound I at 2.0 × 10^8 M−1 s−1.

    Thiocyanate ion → Lactoperoxidase compound I source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Purified LPO transient kinetics; pH 7, 15 °C; preparation species unresolved in abstract.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Purified enzyme kinetics; concentrations, substrate competition and reaction order determine relevance in tissues.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    Thiocyanate is another rapidly reacting substrate.
    primary_references
    Reaction of lactoperoxidase compound I with halides and thiocyanate. · 2002 · https://pubmed.ncbi.nlm.nih.gov/12269834/ · DOI 10.1021/bi026326x

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 200–206

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Purified LPO transient kinetics; pH 7, 15 °C; preparation species unresolved in abstract. · source_derived_draft · unverified_draft

    ## ki-lpo-scn Thiocyanate is another rapidly reacting substrate. Thiocyanate reacted with LPO compound I at 2.0 × 10^8 M−1 s−1. Model: Purified LPO transient kinetics; pH 7, 15 °C; preparation species unresolved in abstract. Limitations: Purified enzyme kinetics; concentrations, substrate competition and reaction order determine relevance in tissues. Evidence location: Primary abstract Reaction of lactoperoxidase compound I with halides and thiocyanate. · 2002 · https://pubmed.ncbi.nlm.nih.gov/12269834/ · DOI 10.1021/bi026326x
    Complete structured claim and evidence
  10. Preincubating LPO with ammonium iodide decreased measured catalytic activity and stabilized a peroxide–iodide ternary complex.

    Iodide ion → Lactoperoxidase catalytic activity source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Structural/biochemical model; enzyme species not assigned from abstract. Cofactor chemistry does not establish dietary iron responsiveness.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    Iodide can inhibit the enzyme under a different order of exposure.
    primary_references
    Structure of a ternary complex of lactoperoxidase with iodide and hydrogen peroxide at 1.77 Å resolution. · 2021 · https://pubmed.ncbi.nlm.nih.gov/33882424/ · DOI 10.1016/j.jinorgbio.2021.111461

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 224–230

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI. · source_derived_draft · unverified_draft

    ## ki-lpo-substrate-block Iodide can inhibit the enzyme under a different order of exposure. Preincubating LPO with ammonium iodide decreased measured catalytic activity and stabilized a peroxide–iodide ternary complex. Model: Purified LPO crystallography and activity assays; ammonium iodide supplied the anion, not KI. Limitations: Structural/biochemical model; enzyme species not assigned from abstract. Cofactor chemistry does not establish dietary iron responsiveness. Evidence location: Primary abstract Structure of a ternary complex of lactoperoxidase with iodide and hydrogen peroxide at 1.77 Å resolution. · 2021 · https://pubmed.ncbi.nlm.nih.gov/33882424/ · DOI 10.1016/j.jinorgbio.2021.111461
    Complete structured claim and evidence
  11. LPO/H2O2/iodide oxidized NADH to a product chemically distinct from NAD+, unlike the thiocyanate and bromide systems.

    Iodide ion → NADH source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Cell-free LPO/H2O2 reactions with nicotinamide nucleotides.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Chemical oxidation is not evidence that supplementation drains niacin in vivo; the authors expected thiocyanate oxidation to predominate in milk/saliva.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    The NADH reaction did not simply regenerate normal NAD+.
    primary_references
    The oxidation of reduced nicotinamide nucleotides by hydrogen peroside in the presence of lactoperoxidase and thiocyanate, iodide or bromide. · 1970 · https://pubmed.ncbi.nlm.nih.gov/4317722/ · DOI 10.1042/bj1170791

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 256–262

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Cell-free LPO/H2O2 reactions with nicotinamide nucleotides. · source_derived_draft · unverified_draft

    ## ki-nadh The NADH reaction did not simply regenerate normal NAD+. LPO/H2O2/iodide oxidized NADH to a product chemically distinct from NAD+, unlike the thiocyanate and bromide systems. Model: Cell-free LPO/H2O2 reactions with nicotinamide nucleotides. Limitations: Chemical oxidation is not evidence that supplementation drains niacin in vivo; the authors expected thiocyanate oxidation to predominate in milk/saliva. Evidence location: Primary abstract The oxidation of reduced nicotinamide nucleotides by hydrogen peroside in the presence of lactoperoxidase and thiocyanate, iodide or bromide. · 1970 · https://pubmed.ncbi.nlm.nih.gov/4317722/ · DOI 10.1042/bj1170791
    Complete structured claim and evidence
  12. NADPH was also oxidized under the LPO/H2O2/iodide conditions.

    Iodide ion → NADPH source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Cell-free LPO/H2O2 reactions with nicotinamide nucleotides.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Chemical oxidation is not evidence that supplementation drains niacin in vivo; the authors expected thiocyanate oxidation to predominate in milk/saliva.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    The chemistry also reaches the NADPH reducing pool.
    primary_references
    The oxidation of reduced nicotinamide nucleotides by hydrogen peroside in the presence of lactoperoxidase and thiocyanate, iodide or bromide. · 1970 · https://pubmed.ncbi.nlm.nih.gov/4317722/ · DOI 10.1042/bj1170791

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 264–270

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Cell-free LPO/H2O2 reactions with nicotinamide nucleotides. · source_derived_draft · unverified_draft

    ## ki-nadph The chemistry also reaches the NADPH reducing pool. NADPH was also oxidized under the LPO/H2O2/iodide conditions. Model: Cell-free LPO/H2O2 reactions with nicotinamide nucleotides. Limitations: Chemical oxidation is not evidence that supplementation drains niacin in vivo; the authors expected thiocyanate oxidation to predominate in milk/saliva. Evidence location: Primary abstract The oxidation of reduced nicotinamide nucleotides by hydrogen peroside in the presence of lactoperoxidase and thiocyanate, iodide or bromide. · 1970 · https://pubmed.ncbi.nlm.nih.gov/4317722/ · DOI 10.1042/bj1170791
    Complete structured claim and evidence
  13. Salivary hypoiodous acid increased after contrast exposure and its change correlated with iodine load.

    Experimental context and source evidence
    experimental_model
    Paired saliva measurements in 40 coronary-angiography patients exposed to iodinated contrast.
    exposure_category
    Study-specific exposure, including pharmacological and in-vitro conditions; normal is the schema fallback outside the three availability categories.
    limitations
    Contrast exposure is not oral KI; observational chemistry endpoints do not establish infection prevention or a safe effective supplement dose.
    nutrient_topic
    Potassium iodide research collection; shared-anion and comparator studies are not all KI interventions. · Potassium iodide
    plain_language
    The saliva contained more of an oxidized iodine species.
    primary_references
    Excess iodine exposure acutely increases salivary iodide and antimicrobial hypoiodous acid concentrations in humans. · 2022 · https://pubmed.ncbi.nlm.nih.gov/36463312/ · DOI 10.1038/s41598-022-23803-8

    Potassium iodide: thyroid and non-thyroid mechanisms, interactions and discovery questions (2026-09-18) · lines 168–174

    AI-assisted research curation; primary-study references, chemical references and label statements individually identified. Not publisher full text. · supports · Paired saliva measurements in 40 coronary-angiography patients exposed to iodinated contrast. · source_derived_draft · unverified_draft

    ## ki-saliva-hoi The saliva contained more of an oxidized iodine species. Salivary hypoiodous acid increased after contrast exposure and its change correlated with iodine load. Model: Paired saliva measurements in 40 coronary-angiography patients exposed to iodinated contrast. Limitations: Contrast exposure is not oral KI; observational chemistry endpoints do not establish infection prevention or a safe effective supplement dose. Evidence location: Primary abstract Excess iodine exposure acutely increases salivary iodide and antimicrobial hypoiodous acid concentrations in humans. · 2022 · https://pubmed.ncbi.nlm.nih.gov/36463312/ · DOI 10.1038/s41598-022-23803-8
    Complete structured claim and evidence

In the sources

Preserved passages that mention this component, quoted exactly. Open one to read it in context.

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