Component

Intestinal calcium absorption

Independent cellular process record; interpretation is limited by each linked claim and its study context.

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

Read recorded mechanisms Open recursive mind map

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 acts on it

  1. Calcitriol administration increased active duodenal calcium transport in vitamin-D-deficient wild-type mice in the Benn study.

    Calcitriol → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    nutrient_deficiency Imported condition classification; unverified.
    cross_nutrient
    Vitamin D–calcium–phosphate regulation.
    evidence_locator
    Abstract: reported experimental results
    evidence_scope
    D3 active metabolite or VDR machinery experiment; not a direct D2-versus-D3 comparison.
    experimental_model
    Vitamin-D-deficient wild-type mice; everted duodenal gut-sac calcium transport
    exposure
    Diet-induced vitamin D deficiency followed by calcitriol administration; exact replacement dose/time not reported in the retrieved abstract.
    limitations
    Wild-type arm is separated from the knockout arms; this is active-hormone replacement, not a D2/D3 oral-dose equivalence test.
    nutrient
    Vitamin D2 and D3 · Vitamin D2 and D3
    nutrient_topic
    Vitamin D2 and D3 research collection; topical membership is not evidence of a direct dietary effect. · Vitamin D2 and D3
    organism
    Mus musculus
    plain_language
    Providing the active hormone restored part of the intestinal calcium-transport response after vitamin D deprivation.
    primary_references
    [vdm-benn2008] Active intestinal calcium transport in the absence of transient receptor potential vanilloid type 6 and calbindin-D9k. (2008). https://pubmed.ncbi.nlm.nih.gov/18325990/ DOI: 10.1210/en.2007-1655
    tissue_or_cell_type
    Duodenum
    trigger_kind
    nutrient_deficiency Imported condition classification; unverified.

    Vitamin D2 and D3: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 649–663

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Vitamin-D-deficient wild-type mice; everted duodenal gut-sac calcium transport · source_derived_draft · unverified_draft

    ### vdm-calcitriol-restores-transport-after-d-deficiency Calcitriol administration increased active duodenal calcium transport in vitamin-D-deficient wild-type mice in the Benn study. Condition category: nutrient_deficiency nutrient_topic: Vitamin D2 and D3 research collection; topical membership is not evidence of a direct dietary effect. plain_language: Providing the active hormone restored part of the intestinal calcium-transport response after vitamin D deprivation. organism: Mus musculus tissue_or_cell_type: Duodenum experimental_model: Vitamin-D-deficient wild-type mice; everted duodenal gut-sac calcium transport limitations: Wild-type arm is separated from the knockout arms; this is active-hormone replacement, not a D2/D3 oral-dose equivalence test. exposure: Diet-induced vitamin D deficiency followed by calcitriol administration; exact replacement dose/time not reported in the retrieved abstract. cross_nutrient: Vitamin D–calcium–phosphate regulation. evidence_locator: Abstract: reported experimental results nutrient: Vitamin D2 and D3 evidence_scope: D3 active metabolite or VDR machinery experiment; not a direct D2-versus-D3 comparison. [vdm-benn2008] Active intestinal calcium transport in the absence of transient receptor potential vanilloid type 6 and calbindin-D9k. (2008). https://pubmed.ncbi.nlm.nih.gov/18325990/ DOI: 10.1210/en.2007-1655
    Complete structured claim and evidence

  2. Fasting achlorhydric participants absorbed substantially less calcium from carbonate than from citrate.

    Calcium carbonate → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    11 achlorhydric patients and nine controls; 250 mg calcium isotope tests.
    exposure
    Fasting achlorhydric mean fractions: carbonate 0.042, citrate 0.452; normal subjects showed no significant formulation difference.
    limitations
    Not evidence that carbonate always fails or citrate always outperforms it.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Homo sapiens
    plain_language
    Low stomach acid can change how a calcium preparation is absorbed.
    primary_references
    [cal-clin-recker1985] Calcium absorption and achlorhydria (1985). https://pubmed.ncbi.nlm.nih.gov/4000241/ DOI: 10.1056/NEJM198507113130202
    tissue_or_cell_type
    Human clinical or absorption endpoint

    Calcium: mechanism-first literature curation (2026-09-17) · lines 1164–1174

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · 11 achlorhydric patients and nine controls; 250 mg calcium isotope tests. · source_derived_draft · unverified_draft

    ### cal-carbonate-fasting-achlorhydria Fasting achlorhydric participants absorbed substantially less calcium from carbonate than from citrate. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Low stomach acid can change how a calcium preparation is absorbed. organism: Homo sapiens tissue_or_cell_type: Human clinical or absorption endpoint experimental_model: 11 achlorhydric patients and nine controls; 250 mg calcium isotope tests. limitations: Not evidence that carbonate always fails or citrate always outperforms it. exposure: Fasting achlorhydric mean fractions: carbonate 0.042, citrate 0.452; normal subjects showed no significant formulation difference. [cal-clin-recker1985] Calcium absorption and achlorhydria (1985). https://pubmed.ncbi.nlm.nih.gov/4000241/ DOI: 10.1056/NEJM198507113130202
    Complete structured claim and evidence

  3. Calcium carbonate given with a normal breakfast showed normal absorption in the achlorhydric participants.

    Calcium carbonate → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Meal comparison in the achlorhydria absorption study.
    limitations
    Small study; the meal experiment did not isolate a molecular rescue mechanism.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Homo sapiens
    plain_language
    The meal changed the result seen during fasting.
    primary_references
    [cal-clin-recker1985] Calcium absorption and achlorhydria (1985). https://pubmed.ncbi.nlm.nih.gov/4000241/ DOI: 10.1056/NEJM198507113130202
    tissue_or_cell_type
    Human clinical or absorption endpoint

    Calcium: mechanism-first literature curation (2026-09-17) · lines 1176–1185

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Meal comparison in the achlorhydria absorption study. · source_derived_draft · unverified_draft

    ### cal-carbonate-meal-achlorhydria Calcium carbonate given with a normal breakfast showed normal absorption in the achlorhydric participants. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: The meal changed the result seen during fasting. organism: Homo sapiens tissue_or_cell_type: Human clinical or absorption endpoint experimental_model: Meal comparison in the achlorhydria absorption study. limitations: Small study; the meal experiment did not isolate a molecular rescue mechanism. [cal-clin-recker1985] Calcium absorption and achlorhydria (1985). https://pubmed.ncbi.nlm.nih.gov/4000241/ DOI: 10.1056/NEJM198507113130202
    Complete structured claim and evidence

  4. Calcium absorption from the tested spinach meal was lower than from milk at equal calcium load.

    Calcium → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    13-adult crossover; 200 mg calcium per test meal, double-isotope measurement.
    exposure
    Mean fractional absorption: spinach 5.1%, milk 27.6%; oxalate slightly exceeded calcium stoichiometrically in tested spinach.
    limitations
    Food-matrix comparison; oxalate binding was inferred from composition, not isolated experimentally. Not a comparison of every plant food.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Homo sapiens
    plain_language
    Equal calcium on a food label need not mean equal absorption.
    primary_references
    [cal-clin-heaney1988] Calcium absorbability from spinach (1988). https://pubmed.ncbi.nlm.nih.gov/3354496/ DOI: 10.1093/ajcn/47.4.707
    tissue_or_cell_type
    Human clinical or absorption endpoint

    Calcium: mechanism-first literature curation (2026-09-17) · lines 1152–1162

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · 13-adult crossover; 200 mg calcium per test meal, double-isotope measurement. · source_derived_draft · unverified_draft

    ### cal-food-spinach-absorption Calcium absorption from the tested spinach meal was lower than from milk at equal calcium load. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Equal calcium on a food label need not mean equal absorption. organism: Homo sapiens tissue_or_cell_type: Human clinical or absorption endpoint experimental_model: 13-adult crossover; 200 mg calcium per test meal, double-isotope measurement. limitations: Food-matrix comparison; oxalate binding was inferred from composition, not isolated experimentally. Not a comparison of every plant food. exposure: Mean fractional absorption: spinach 5.1%, milk 27.6%; oxalate slightly exceeded calcium stoichiometrically in tested spinach. [cal-clin-heaney1988] Calcium absorbability from spinach (1988). https://pubmed.ncbi.nlm.nih.gov/3354496/ DOI: 10.1093/ajcn/47.4.707
    Complete structured claim and evidence

  5. Intestinal Atp2b1 deletion prevented the active-calcium-transport increase elicited by calcitriol in control mice.

    Plasma membrane calcium ATPase 1 / ATP2B1 → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    experimental_model
    Villin-Cre intestine-specific Atp2b1 deletion in mice
    limitations
    Conditional deletion and administered calcitriol; basal absorption was not shown to be zero.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Mus musculus
    plain_language
    A calcium pump is needed for this hormone response.
    primary_references
    [ryan2015] Deletion of the intestinal plasma membrane calcium pump, isoform 1, Atp2b1, in mice is associated with decreased bone mineral density and impaired responsiveness to 1, 25-dihydroxyvitamin D3 (2015). https://pmc.ncbi.nlm.nih.gov/articles/PMC4772868/ DOI: 10.1016/j.bbrc.2015.09.087
    tissue_or_cell_type
    Intestinal absorptive cells
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Calcium: mechanism-first literature curation (2026-09-17) · lines 280–289

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Villin-Cre intestine-specific Atp2b1 deletion in mice · source_derived_draft · unverified_draft

    ### intestinal-pmca1-loss-calcitriol-response Intestinal Atp2b1 deletion prevented the active-calcium-transport increase elicited by calcitriol in control mice. Condition category: machinery_impairment nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: A calcium pump is needed for this hormone response. organism: Mus musculus tissue_or_cell_type: Intestinal absorptive cells experimental_model: Villin-Cre intestine-specific Atp2b1 deletion in mice limitations: Conditional deletion and administered calcitriol; basal absorption was not shown to be zero. [ryan2015] Deletion of the intestinal plasma membrane calcium pump, isoform 1, Atp2b1, in mice is associated with decreased bone mineral density and impaired responsiveness to 1, 25-dihydroxyvitamin D3 (2015). https://pmc.ncbi.nlm.nih.gov/articles/PMC4772868/ DOI: 10.1016/j.bbrc.2015.09.087
    Complete structured claim and evidence

  6. Trpv5-null mice show increased intestinal absorption of orally administered calcium tracer.

    TRPV5 → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    experimental_model
    Trpv5 knockout mice; renal micropuncture and oral calcium tracer assays
    limitations
    Compensation accompanies renal loss; not direct intestinal TRPV5 transport.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Mus musculus
    plain_language
    Gut uptake compensates for kidney losses.
    primary_references
    [hoenderop2003] Renal Ca2+ wasting, hyperabsorption, and reduced bone thickness in mice lacking TRPV5 (2003). https://pmc.ncbi.nlm.nih.gov/articles/PMC297001/ DOI: 10.1172/JCI19826
    tissue_or_cell_type
    Intestine
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Calcium: mechanism-first literature curation (2026-09-17) · lines 247–256

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Trpv5 knockout mice; renal micropuncture and oral calcium tracer assays · source_derived_draft · unverified_draft

    ### trpv5-loss-compensatory-intestinal-absorption Trpv5-null mice show increased intestinal absorption of orally administered calcium tracer. Condition category: machinery_impairment nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Gut uptake compensates for kidney losses. organism: Mus musculus tissue_or_cell_type: Intestine experimental_model: Trpv5 knockout mice; renal micropuncture and oral calcium tracer assays limitations: Compensation accompanies renal loss; not direct intestinal TRPV5 transport. [hoenderop2003] Renal Ca2+ wasting, hyperabsorption, and reduced bone thickness in mice lacking TRPV5 (2003). https://pmc.ncbi.nlm.nih.gov/articles/PMC297001/ DOI: 10.1172/JCI19826
    Complete structured claim and evidence

  7. Significant active duodenal calcium transport persists in Trpv6/calbindin-D9k double-null mice under the tested stimulation conditions.

    TRPV6 and calbindin-D9k → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    experimental_model
    Trpv6 and calbindin-D9k single/double knockout mice; duodenal transport assays
    limitations
    Residual transport does not establish dispensability under every diet or life stage.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Mus musculus
    plain_language
    Other routes can support active calcium absorption.
    primary_references
    [benn2008] Active intestinal calcium transport in the absence of transient receptor potential vanilloid type 6 and calbindin-D9k (2008). https://pmc.ncbi.nlm.nih.gov/articles/PMC2408805/ DOI: 10.1210/en.2007-1655
    reported_effect
    retained
    tissue_or_cell_type
    Duodenum
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Calcium: mechanism-first literature curation (2026-09-17) · lines 169–179

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Trpv6 and calbindin-D9k single/double knockout mice; duodenal transport assays · source_derived_draft · unverified_draft

    ### trpv6-calbindin-independent-active-transport Significant active duodenal calcium transport persists in Trpv6/calbindin-D9k double-null mice under the tested stimulation conditions. Condition category: machinery_impairment nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Other routes can support active calcium absorption. organism: Mus musculus tissue_or_cell_type: Duodenum experimental_model: Trpv6 and calbindin-D9k single/double knockout mice; duodenal transport assays limitations: Residual transport does not establish dispensability under every diet or life stage. reported_effect: retained [benn2008] Active intestinal calcium transport in the absence of transient receptor potential vanilloid type 6 and calbindin-D9k (2008). https://pmc.ncbi.nlm.nih.gov/articles/PMC2408805/ DOI: 10.1210/en.2007-1655
    Complete structured claim and evidence

  8. Trpv6 deletion reduced intestinal calcium absorption by about 60% in the Bianco mouse model.

    TRPV6 → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    experimental_model
    Whole-body Trpv6 knockout mice under regular and low-calcium diets
    limitations
    Whole-body deletion; diet and assay matter; residual absorption remained.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Mus musculus
    plain_language
    TRPV6 materially supports calcium uptake in this model.
    primary_references
    [bianco2007] Marked disturbance of calcium homeostasis in mice with targeted disruption of the Trpv6 calcium channel gene (2007). https://pubmed.ncbi.nlm.nih.gov/17129178/ DOI: 10.1359/jbmr.061110
    tissue_or_cell_type
    Intestine
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Calcium: mechanism-first literature curation (2026-09-17) · lines 158–167

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Whole-body Trpv6 knockout mice under regular and low-calcium diets · source_derived_draft · unverified_draft

    ### trpv6-loss-reduces-absorption Trpv6 deletion reduced intestinal calcium absorption by about 60% in the Bianco mouse model. Condition category: machinery_impairment nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: TRPV6 materially supports calcium uptake in this model. organism: Mus musculus tissue_or_cell_type: Intestine experimental_model: Whole-body Trpv6 knockout mice under regular and low-calcium diets limitations: Whole-body deletion; diet and assay matter; residual absorption remained. [bianco2007] Marked disturbance of calcium homeostasis in mice with targeted disruption of the Trpv6 calcium channel gene (2007). https://pubmed.ncbi.nlm.nih.gov/17129178/ DOI: 10.1359/jbmr.061110
    Complete structured claim and evidence

  9. Adding lysine plus arginine to a low-protein diet produced only a nonsignificant calcium-absorption trend: 25.2% versus 22.3% with control, P=0.094.

    L-Lysine → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Six-day randomized crossover feeding study in 14 women
    limitations
    Combined amino acids; small sample; specifically low-protein background diet; no long-term skeletal endpoint.
    organism
    Homo sapiens
    plain_language
    The trial did not establish a statistically significant absorption benefit.
    primary_references
    [bihuniak2014] Supplementing a low-protein diet with dibasic amino acids increases urinary calcium excretion in young women (2014). https://pmc.ncbi.nlm.nih.gov/articles/PMC3927545/ DOI: 10.3945/jn.113.185009
    tissue_or_cell_type
    Intestine

    L-Lysine: mechanism-first literature curation (2026-09-17) · lines 769–777

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Six-day randomized crossover feeding study in 14 women · source_derived_draft · unverified_draft

    ### dibasic-calcium-absorption-trend Adding lysine plus arginine to a low-protein diet produced only a nonsignificant calcium-absorption trend: 25.2% versus 22.3% with control, P=0.094. Plain language: The trial did not establish a statistically significant absorption benefit. Condition category: normal organism: Homo sapiens tissue_or_cell_type: Intestine experimental_model: Six-day randomized crossover feeding study in 14 women limitations: Combined amino acids; small sample; specifically low-protein background diet; no long-term skeletal endpoint. [bihuniak2014] Supplementing a low-protein diet with dibasic amino acids increases urinary calcium excretion in young women (2014). https://pmc.ncbi.nlm.nih.gov/articles/PMC3927545/ DOI: 10.3945/jn.113.185009
    Complete structured claim and evidence

  10. In a short-term study of osteoporotic patients, lysine supplementation increased measured calcium absorption, whereas the valine and tryptophan comparators did not.

    L-Lysine → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    experimental_model
    Amino-acid comparator experiment using 800 mg/day in 45 osteoporotic patients
    limitations
    Short-term mineral handling; no fracture prevention or bone-density benefit established.
    organism
    Homo sapiens
    plain_language
    A small experiment found better absorption of calcium.
    primary_references
    [civitelli1992] Dietary L-lysine and calcium metabolism in humans (1992). https://pubmed.ncbi.nlm.nih.gov/1486246/
    tissue_or_cell_type
    Intestine

    L-Lysine: mechanism-first literature curation (2026-09-17) · lines 749–757

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Amino-acid comparator experiment using 800 mg/day in 45 osteoporotic patients · source_derived_draft · unverified_draft

    ### lysine-calcium-intestinal-study In a short-term study of osteoporotic patients, lysine supplementation increased measured calcium absorption, whereas the valine and tryptophan comparators did not. Plain language: A small experiment found better absorption of calcium. Condition category: normal organism: Homo sapiens tissue_or_cell_type: Intestine experimental_model: Amino-acid comparator experiment using 800 mg/day in 45 osteoporotic patients limitations: Short-term mineral handling; no fracture prevention or bone-density benefit established. [civitelli1992] Dietary L-lysine and calcium metabolism in humans (1992). https://pubmed.ncbi.nlm.nih.gov/1486246/
    Complete structured claim and evidence

  11. Apparent calcium absorption was unchanged in the ileostomy study.

    Citrus pectin, preparation specified by study → Intestinal calcium absorption source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/pectin-research/6307932.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "fd45607a7ff1d1a20dd52d145134da591847919c3db47ef8a8cf5693fb9f80a1", "start_char": 0, "end_char": 1593, "text_sha256": "fd45607a7ff1d1a20dd52d145134da591847919c3db47ef8a8cf5693fb9f80a1"}
    experimental_model
    Within-person ileostomy balance study; six participants
    exposure
    15 g/day citrus pectin on days 5-7 of a 10-day low-fiber feeding protocol
    limitations
    Ileal apparent absorption and output are not whole-body status or clinical deficiency; the colon was bypassed.
    nutrient_topic
    Pectin research collection; topical membership is not evidence of a direct dietary effect. · Pectin, structurally heterogeneous plant polysaccharides
    organism
    Homo sapiens
    plain_language
    The effect on iron did not extend to every mineral.
    primary_references
    [pectin-p6307932] The effect of citrus pectin on the absorption of nutrients in the small intestine. (1983). https://pubmed.ncbi.nlm.nih.gov/6307932/
    tissue_or_cell_type
    Small intestine; ileal effluent

    Pectin: metabolism, signaling and nutrient connections (2026-09-17) · lines 607–618

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Within-person ileostomy balance study; six participants · source_derived_draft · unverified_draft

    ### pectin-ileal-calcium-null Apparent calcium absorption was unchanged in the ileostomy study. Condition category: normal nutrient_topic: Pectin research collection; topical membership is not evidence of a direct dietary effect. plain_language: The effect on iron did not extend to every mineral. organism: Homo sapiens tissue_or_cell_type: Small intestine; ileal effluent experimental_model: Within-person ileostomy balance study; six participants limitations: Ileal apparent absorption and output are not whole-body status or clinical deficiency; the colon was bypassed. exposure: 15 g/day citrus pectin on days 5-7 of a 10-day low-fiber feeding protocol evidence_span: {"source_cache": "artifacts/pectin-research/6307932.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "fd45607a7ff1d1a20dd52d145134da591847919c3db47ef8a8cf5693fb9f80a1", "start_char": 0, "end_char": 1593, "text_sha256": "fd45607a7ff1d1a20dd52d145134da591847919c3db47ef8a8cf5693fb9f80a1"} [pectin-p6307932] The effect of citrus pectin on the absorption of nutrients in the small intestine. (1983). https://pubmed.ncbi.nlm.nih.gov/6307932/
    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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