Component
Serum magnesium concentration
Measured circulating magnesium concentration; not a direct readout of all tissue stores.
10 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.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
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.
What it acts on
Low baseline serum magnesium was associated with subsequent refeeding syndrome in the cohort.
Experimental context and source evidence
- availability_state
- biomarker_context Imported condition classification; unverified.
- experimental_model
- Three syndrome events among 243 adults.
- exposure
- Study-specific exposure described in the model; no regimen inferred beyond the accessed evidence.
- limitations
- Too few events for robust multivariable regression; association does not identify a universal causal bottleneck.
- nutrient_topic
- Thiamine research collection; topical membership is not evidence of a direct dietary effect. · Thiamine (vitamin B1)
- organism
- Homo sapiens
- plain_language
- A mineral shortage was a risk signal alongside poor prior intake.
- primary_references
- [b1-rio2013] Occurrence of refeeding syndrome in adults started on artificial nutrition support: prospective cohort study (2013). https://pubmed.ncbi.nlm.nih.gov/23315514/ DOI: 10.1136/bmjopen-2012-002173
- tissue_or_cell_type
- Serum and clinical course
- trigger_kind
- biomarker_context Imported condition classification; unverified.
Thiamine: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 1746–1756
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Three syndrome events among 243 adults. · source_derived_draft · unverified_draft
### b1-refeeding-low-mg-association Low baseline serum magnesium was associated with subsequent refeeding syndrome in the cohort. Condition category: biomarker_context nutrient_topic: Thiamine research collection; topical membership is not evidence of a direct dietary effect. plain_language: A mineral shortage was a risk signal alongside poor prior intake. organism: Homo sapiens tissue_or_cell_type: Serum and clinical course experimental_model: Three syndrome events among 243 adults. limitations: Too few events for robust multivariable regression; association does not identify a universal causal bottleneck. exposure: Study-specific exposure described in the model; no regimen inferred beyond the accessed evidence. [b1-rio2013] Occurrence of refeeding syndrome in adults started on artificial nutrition support: prospective cohort study (2013). https://pubmed.ncbi.nlm.nih.gov/23315514/ DOI: 10.1136/bmjopen-2012-002173
Complete structured claim and evidence
What acts on it
Pathogenic biallelic TRPM6 variants were identified in families with hypomagnesemia and secondary hypocalcemia.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- cross_nutrient
- Calcium concentration also fell in the inherited Mg-handling disorder; this record does not specify the downstream endocrine mechanism.
- evidence-system
- Familial positional genetics
- experimental_model
- Familial positional genetics
- limitations
- Mapping alone does not apportion intestinal versus renal contributions or prove every downstream symptom is Mg-only.
- nutrient_topic
- Magnesium research collection; topical membership is not evidence of a direct dietary effect. · Magnesium
- organism
- Human
- plain_language
- Inherited failure of magnesium handling produced a recognizable low-magnesium disorder.
- primary_references
- [schlingmann-2002-trpm6] Hypomagnesemia with secondary hypocalcemia is caused by mutations in TRPM6, a new member of the TRPM gene family. (2002). https://pubmed.ncbi.nlm.nih.gov/12032568/ DOI: 10.1038/ng889
- tissue
- Intestine and kidney implicated; serum phenotype
- tissue_or_cell_type
- Intestine and kidney implicated; serum phenotype
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Magnesium: cross-nutrient mechanisms and deficiency (2026-09-17) · lines 909–921
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Familial positional genetics · source_derived_draft · unverified_draft
### human-trpm6-loss-low-magnesium Pathogenic biallelic TRPM6 variants were identified in families with hypomagnesemia and secondary hypocalcemia. Condition category: machinery_impairment nutrient_topic: Magnesium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Inherited failure of magnesium handling produced a recognizable low-magnesium disorder. organism: Human tissue_or_cell_type: Intestine and kidney implicated; serum phenotype experimental_model: Familial positional genetics limitations: Mapping alone does not apportion intestinal versus renal contributions or prove every downstream symptom is Mg-only. cross_nutrient: Calcium concentration also fell in the inherited Mg-handling disorder; this record does not specify the downstream endocrine mechanism. evidence-system: Familial positional genetics tissue: Intestine and kidney implicated; serum phenotype [schlingmann-2002-trpm6] Hypomagnesemia with secondary hypocalcemia is caused by mutations in TRPM6, a new member of the TRPM gene family. (2002). https://pubmed.ncbi.nlm.nih.gov/12032568/ DOI: 10.1038/ng889
Complete structured claim and evidenceIntestine-restricted Trpm6 deletion reduced serum and bone magnesium in the tested adult mice.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence-system
- Villin1-Cre conditional deletion; six-month-old male mice
- experimental_model
- Villin1-Cre conditional deletion; six-month-old male mice
- limitations
- Colon expression was detected; the outcome does not quantify the contribution of each human intestinal segment.
- nutrient_topic
- Magnesium research collection; topical membership is not evidence of a direct dietary effect. · Magnesium
- organism
- Mouse
- plain_language
- Removing intestinal TRPM6 impaired systemic magnesium supply despite intact kidneys.
- primary_references
- [chubanov-2016-trpm6] Epithelial magnesium transport by TRPM6 is essential for prenatal development and adult survival (2016). https://elifesciences.org/articles/20914 DOI: 10.7554/eLife.20914
- tissue
- Intestinal epithelium; serum and bone
- tissue_or_cell_type
- Intestinal epithelium; serum and bone
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Magnesium: cross-nutrient mechanisms and deficiency (2026-09-17) · lines 923–934
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Villin1-Cre conditional deletion; six-month-old male mice · source_derived_draft · unverified_draft
### intestinal-trpm6-loss-low-magnesium Intestine-restricted Trpm6 deletion reduced serum and bone magnesium in the tested adult mice. Condition category: machinery_impairment nutrient_topic: Magnesium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Removing intestinal TRPM6 impaired systemic magnesium supply despite intact kidneys. organism: Mouse tissue_or_cell_type: Intestinal epithelium; serum and bone experimental_model: Villin1-Cre conditional deletion; six-month-old male mice limitations: Colon expression was detected; the outcome does not quantify the contribution of each human intestinal segment. evidence-system: Villin1-Cre conditional deletion; six-month-old male mice tissue: Intestinal epithelium; serum and bone [chubanov-2016-trpm6] Epithelial magnesium transport by TRPM6 is essential for prenatal development and adult survival (2016). https://elifesciences.org/articles/20914 DOI: 10.7554/eLife.20914
Complete structured claim and evidenceIntestinal Trpm7 deletion lowered magnesium availability in early postnatal mice.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence-system
- Villin1-Cre conditional deletion and mineral phenotyping
- experimental_model
- Villin1-Cre conditional deletion and mineral phenotyping
- limitations
- Early developmental model; not a test of dietary Mg restriction.
- nutrient_topic
- Magnesium research collection; topical membership is not evidence of a direct dietary effect. · Magnesium
- organism
- Mouse
- plain_language
- Suckling mice required intestinal TRPM7 to maintain their magnesium supply.
- primary_references
- [mittermeier-2019-trpm7] TRPM7 is the central gatekeeper of intestinal mineral absorption essential for postnatal survival (2019). https://pubmed.ncbi.nlm.nih.gov/30770447/ DOI: 10.1073/pnas.1810633116
- tissue
- Intestinal enterocytes; serum
- tissue_or_cell_type
- Intestinal enterocytes; serum
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Magnesium: cross-nutrient mechanisms and deficiency (2026-09-17) · lines 975–986
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Villin1-Cre conditional deletion and mineral phenotyping · source_derived_draft · unverified_draft
### intestinal-trpm7-loss-magnesium Intestinal Trpm7 deletion lowered magnesium availability in early postnatal mice. Condition category: machinery_impairment nutrient_topic: Magnesium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Suckling mice required intestinal TRPM7 to maintain their magnesium supply. organism: Mouse tissue_or_cell_type: Intestinal enterocytes; serum experimental_model: Villin1-Cre conditional deletion and mineral phenotyping limitations: Early developmental model; not a test of dietary Mg restriction. evidence-system: Villin1-Cre conditional deletion and mineral phenotyping tissue: Intestinal enterocytes; serum [mittermeier-2019-trpm7] TRPM7 is the central gatekeeper of intestinal mineral absorption essential for postnatal survival (2019). https://pubmed.ncbi.nlm.nih.gov/30770447/ DOI: 10.1073/pnas.1810633116
Complete structured claim and evidenceMg biomarkers declined on the low-Mg diet, but hypomagnesemia, hypocalcemia and hypokalemia were not detected.
Experimental context and source evidence
- availability_state
- biomarker_context Imported condition classification; unverified.
- evidence-system
- Crossover feeding and biochemical monitoring
- experimental_model
- Crossover feeding and biochemical monitoring
- exposure
- Chemically measured mean intake: 130 mg Mg/day in the low period versus 411 mg/day in the supplemented period; 81 days per period after 10-day equilibration. These are experimental exposures, not recommendations.
- limitations
- A study-specific biomarker observation; not a diagnostic rule for all normal serum values.
- nutrient_topic
- Magnesium research collection; topical membership is not evidence of a direct dietary effect. · Magnesium
- organism
- Human
- plain_language
- A normal-range serum result did not rule out the diet-related electrical phenotype in these participants.
- primary_references
- [klevay-2002-ectopy] Low dietary magnesium increases supraventricular ectopy (2002). https://ajcn.nutrition.org/article/S0002-9165%2823%2906154-3/fulltext DOI: 10.1093/ajcn/75.3.550
- tissue
- Serum, erythrocytes and urine
- tissue_or_cell_type
- Serum, erythrocytes and urine
- trigger_kind
- biomarker_context Imported condition classification; unverified.
Magnesium: cross-nutrient mechanisms and deficiency (2026-09-17) · lines 1332–1344
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Crossover feeding and biochemical monitoring · source_derived_draft · unverified_draft
### low-magnesium-diet-without-hypomagnesemia Mg biomarkers declined on the low-Mg diet, but hypomagnesemia, hypocalcemia and hypokalemia were not detected. Condition category: biomarker_context nutrient_topic: Magnesium research collection; topical membership is not evidence of a direct dietary effect. plain_language: A normal-range serum result did not rule out the diet-related electrical phenotype in these participants. organism: Human tissue_or_cell_type: Serum, erythrocytes and urine experimental_model: Crossover feeding and biochemical monitoring limitations: A study-specific biomarker observation; not a diagnostic rule for all normal serum values. exposure: Chemically measured mean intake: 130 mg Mg/day in the low period versus 411 mg/day in the supplemented period; 81 days per period after 10-day equilibration. These are experimental exposures, not recommendations. evidence-system: Crossover feeding and biochemical monitoring tissue: Serum, erythrocytes and urine [klevay-2002-ectopy] Low dietary magnesium increases supraventricular ectopy (2002). https://ajcn.nutrition.org/article/S0002-9165%2823%2906154-3/fulltext DOI: 10.1093/ajcn/75.3.550
Complete structured claim and evidenceKidney-restricted Trpm6 deletion did not lower serum Mg or raise urinary Mg in the tested mice.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence-system
- Ksp-Cre conditional deletion; six-month-old male mice
- experimental_model
- Ksp-Cre conditional deletion; six-month-old male mice
- limitations
- Bone Mg was slightly reduced; this is not proof renal TRPM6 is dispensable under every diet or in humans.
- nutrient_topic
- Magnesium research collection; topical membership is not evidence of a direct dietary effect. · Magnesium
- organism
- Mouse
- plain_language
- These mice maintained circulating magnesium after kidney-specific TRPM6 loss.
- primary_references
- [chubanov-2016-trpm6] Epithelial magnesium transport by TRPM6 is essential for prenatal development and adult survival (2016). https://elifesciences.org/articles/20914 DOI: 10.7554/eLife.20914
- tissue
- Kidney; serum and urine
- tissue_or_cell_type
- Kidney; serum and urine
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Magnesium: cross-nutrient mechanisms and deficiency (2026-09-17) · lines 936–947
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Ksp-Cre conditional deletion; six-month-old male mice · source_derived_draft · unverified_draft
### renal-trpm6-loss-serum-preserved Kidney-restricted Trpm6 deletion did not lower serum Mg or raise urinary Mg in the tested mice. Condition category: machinery_impairment nutrient_topic: Magnesium research collection; topical membership is not evidence of a direct dietary effect. plain_language: These mice maintained circulating magnesium after kidney-specific TRPM6 loss. organism: Mouse tissue_or_cell_type: Kidney; serum and urine experimental_model: Ksp-Cre conditional deletion; six-month-old male mice limitations: Bone Mg was slightly reduced; this is not proof renal TRPM6 is dispensable under every diet or in humans. evidence-system: Ksp-Cre conditional deletion; six-month-old male mice tissue: Kidney; serum and urine [chubanov-2016-trpm6] Epithelial magnesium transport by TRPM6 is essential for prenatal development and adult survival (2016). https://elifesciences.org/articles/20914 DOI: 10.7554/eLife.20914
Complete structured claim and evidenceSlc41a1-null mice maintained serum and urinary Mg similarly to littermates under standard and Mg-restricted diets.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence-system
- Constitutive knockout with dietary Mg restriction challenge
- experimental_model
- Constitutive knockout with dietary Mg restriction challenge
- limitations
- Does not prove absence of all cell-specific functions; zebrafish and overexpression findings have different scope.
- nutrient_topic
- Magnesium research collection; topical membership is not evidence of a direct dietary effect. · Magnesium
- organism
- Mouse
- plain_language
- Deleting SLC41A1 did not make these mice uniquely unable to maintain magnesium balance.
- primary_references
- [ilenwabor-2022-slc41a1] SLC41A1 knockout mice display normal magnesium homeostasis (2022). https://pubmed.ncbi.nlm.nih.gov/36049064/ DOI: 10.1152/ajprenal.00101.2022
- tissue
- Kidney; serum and urine
- tissue_or_cell_type
- Kidney; serum and urine
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Magnesium: cross-nutrient mechanisms and deficiency (2026-09-17) · lines 1195–1206
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Constitutive knockout with dietary Mg restriction challenge · source_derived_draft · unverified_draft
### slc41a1-null-mouse-magnesium-preserved Slc41a1-null mice maintained serum and urinary Mg similarly to littermates under standard and Mg-restricted diets. Condition category: machinery_impairment nutrient_topic: Magnesium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Deleting SLC41A1 did not make these mice uniquely unable to maintain magnesium balance. organism: Mouse tissue_or_cell_type: Kidney; serum and urine experimental_model: Constitutive knockout with dietary Mg restriction challenge limitations: Does not prove absence of all cell-specific functions; zebrafish and overexpression findings have different scope. evidence-system: Constitutive knockout with dietary Mg restriction challenge tissue: Kidney; serum and urine [ilenwabor-2022-slc41a1] SLC41A1 knockout mice display normal magnesium homeostasis (2022). https://pubmed.ncbi.nlm.nih.gov/36049064/ DOI: 10.1152/ajprenal.00101.2022
Complete structured claim and evidence
Where it participates (unsigned role)
CNNM2 variants in the reported families associated with hypomagnesemia, seizures and developmental impairment.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence-system
- Five unrelated families plus functional and zebrafish evidence
- experimental_model
- Five unrelated families plus functional and zebrafish evidence
- limitations
- Neurological features persisted despite supplementation; do not equate the full genetic phenotype with reversible dietary Mg deficiency.
- nutrient_topic
- Magnesium research collection; topical membership is not evidence of a direct dietary effect. · Magnesium
- organism
- Human
- plain_language
- This inherited disorder includes neurological abnormalities alongside low magnesium.
- primary_references
- [arjona-2014-cnnm2] CNNM2 Mutations Cause Impaired Brain Development and Seizures in Patients with Hypomagnesemia (2014). https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1004267 DOI: 10.1371/journal.pgen.1004267
- tissue
- Kidney and nervous system
- tissue_or_cell_type
- Kidney and nervous system
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Magnesium: cross-nutrient mechanisms and deficiency (2026-09-17) · lines 1125–1136
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Five unrelated families plus functional and zebrafish evidence · source_derived_draft · unverified_draft
### cnnm2-variants-neurodevelopment CNNM2 variants in the reported families associated with hypomagnesemia, seizures and developmental impairment. Condition category: machinery_impairment nutrient_topic: Magnesium research collection; topical membership is not evidence of a direct dietary effect. plain_language: This inherited disorder includes neurological abnormalities alongside low magnesium. organism: Human tissue_or_cell_type: Kidney and nervous system experimental_model: Five unrelated families plus functional and zebrafish evidence limitations: Neurological features persisted despite supplementation; do not equate the full genetic phenotype with reversible dietary Mg deficiency. evidence-system: Five unrelated families plus functional and zebrafish evidence tissue: Kidney and nervous system [arjona-2014-cnnm2] CNNM2 Mutations Cause Impaired Brain Development and Seizures in Patients with Hypomagnesemia (2014). https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1004267 DOI: 10.1371/journal.pgen.1004267
Complete structured claim and evidenceTwo homozygous EGF P1070L sisters had low serum magnesium with inappropriately sustained urinary Mg loss.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence-system
- Human pedigree and serum/urine phenotyping
- experimental_model
- Human pedigree and serum/urine phenotyping
- limitations
- Small kindred; cellular sorting experiments support the explanation rather than directly measuring the entire cascade in vivo.
- nutrient_topic
- Magnesium research collection; topical membership is not evidence of a direct dietary effect. · Magnesium
- organism
- Human
- plain_language
- The inherited EGF defect was linked to failure of the kidneys to conserve magnesium.
- primary_references
- [groenestege-2007-egf] Impaired basolateral sorting of pro-EGF causes isolated recessive renal hypomagnesemia (2007). https://www.jci.org/articles/view/31680 DOI: 10.1172/JCI31680
- tissue
- Kidney; serum and urine
- tissue_or_cell_type
- Kidney; serum and urine
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Magnesium: cross-nutrient mechanisms and deficiency (2026-09-17) · lines 1043–1054
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Human pedigree and serum/urine phenotyping · source_derived_draft · unverified_draft
### egf-variant-human-magnesium-wasting Two homozygous EGF P1070L sisters had low serum magnesium with inappropriately sustained urinary Mg loss. Condition category: machinery_impairment nutrient_topic: Magnesium research collection; topical membership is not evidence of a direct dietary effect. plain_language: The inherited EGF defect was linked to failure of the kidneys to conserve magnesium. organism: Human tissue_or_cell_type: Kidney; serum and urine experimental_model: Human pedigree and serum/urine phenotyping limitations: Small kindred; cellular sorting experiments support the explanation rather than directly measuring the entire cascade in vivo. evidence-system: Human pedigree and serum/urine phenotyping tissue: Kidney; serum and urine [groenestege-2007-egf] Impaired basolateral sorting of pro-EGF causes isolated recessive renal hypomagnesemia (2007). https://www.jci.org/articles/view/31680 DOI: 10.1172/JCI31680
Complete structured claim and evidenceTwo of three adults with homozygous PCBD1 mutations had hypomagnesemia with renal magnesium loss.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence_access
- Primary abstract
- experimental_model
- Small human case series, three adults with homozygous PCBD1 mutations.
- limitations
- Two also had MODY-like diabetes regardless of magnesium status; neither finding establishes that phenylalanine supplements cause or correct the disorder.
- nutrient_topic
- L-Phenylalanine collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · L-Phenylalanine
- plain_language
- A genetic defect can connect abnormal phenylalanine handling with magnesium wasting.
- primary_references
- Mutations in PCBD1 cause hypomagnesemia and renal magnesium wasting. · 2014 · https://pubmed.ncbi.nlm.nih.gov/24204001/ · DOI 10.1681/ASN.2013040337
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
L-Phenylalanine: transport, protein synthesis, cofactor recycling and cross-nutrient mechanisms (2026-09-19) · lines 94–100
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Small human case series, three adults with homozygous PCBD1 mutations. · source_derived_draft · unverified_draft
## l-phenylalanine-pcbd-magnesium A genetic defect can connect abnormal phenylalanine handling with magnesium wasting. Two of three adults with homozygous PCBD1 mutations had hypomagnesemia with renal magnesium loss. Model: Small human case series, three adults with homozygous PCBD1 mutations. Limitations: Two also had MODY-like diabetes regardless of magnesium status; neither finding establishes that phenylalanine supplements cause or correct the disorder. Evidence access: Primary abstract Mutations in PCBD1 cause hypomagnesemia and renal magnesium wasting. · 2014 · https://pubmed.ncbi.nlm.nih.gov/24204001/ · DOI 10.1681/ASN.2013040337
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.