THE PURSER WELLNESS LIBRARY

Let’s explore 25-hydroxyvitamin D, total — lab reference

A COURSE FOR YOUR CURIOSITYGetting to know your micronutrients

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498 discoveries for your curiosity16 matching listings grouped; alternative sources stay available.

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Gene referenceSep 23, 2026

CD14

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CD14 helps immune cells recognize microbial components, including bacterial lipopolysaccharide, as part of innate immune signaling. This places it upstream of some cytokine responses. Also called: Cluster of Differentiation 14 How immune ce…

Gene referenceSep 23, 2026

COL5A1

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COL5A1 encodes one component of type V collagen, which helps organize collagen fibers. It connects to the strength and structure of tendons, skin and other connective tissues. Also called: Collagen Type V Alpha 1 Chain Collagen structure, t…

Gene referenceSep 23, 2026

COMT

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Makes an enzyme that helps break down catechol compounds, including some neurotransmitters. A common variant does not by itself explain mood, attention or stress tolerance. Also called: Catechol-O-Methyltransferase Catecholamines and sensit…

Gene referenceSep 23, 2026

CTH

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Dr. Also called: Cystathionine Gamma-Lyase From homocysteine toward glutathione Dr. Purser places CTH in the sulfur-handling pathway that connects homocysteine with glutathione production. In that map, CTH concerns the downstream step that …

Gene referenceSep 23, 2026

DHFR

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DHFR helps reduce folic acid and dihydrofolate to tetrahydrofolate-related forms used in cellular metabolism. This is one part of the folate system, distinct from MTHFR and folate transport into cells. Also called: Dihydrofolate Reductase R…

Gene referenceSep 23, 2026

ESR1

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ESR1 encodes estrogen receptor alpha, which helps cells respond to estrogen. Receptor signaling is different from the amount of estrogen measured in blood. Also called: Estrogen Receptor 1 Estrogen signaling depends on the receptor ESR1 enc…

Gene referenceSep 23, 2026

FADS1

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Encodes an enzyme involved in fatty-acid metabolism. Also called: Fatty Acid Desaturase 1 / D5D The form of a fatty acid matters Dr. Purser teaches FADS genes as a conversion pathway. FADS1 participates in a delta-5 desaturase step in fatty…

Gene referenceSep 23, 2026

FADS2

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Encodes an enzyme involved in fatty-acid metabolism. Also called: Fatty Acid Desaturase 2 / D6D The form of a fatty acid matters Dr. Purser teaches FADS genes as a conversion pathway. FADS2 participates in a delta-6 desaturase step in fatty…

Gene referenceSep 23, 2026

FOLH1

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Dr. Also called: Folate Hydrolase 1 Folate handling begins before remethylation Dr. Purser’s genetic chapters include FOLH1 in folate handling. The earlier genetics reference explains its role in breaking down polyglutamated food folates in…

Gene referenceSep 23, 2026

FOLR1

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FOLR1 encodes folate receptor alpha, which helps cells take up folate and has an important role in folate transport at the brain’s barriers. Blood folate and folate availability in the nervous system are not identical measurements. Also cal…

Gene referenceSep 23, 2026

FOLR2

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FOLR2 encodes folate receptor beta, a folate-binding protein expressed in particular cell types, including subsets of immune cells. It is distinct from the FOLR1 receptor and the SLC19A1 reduced folate carrier. Also called: Folate Receptor …

Gene referenceSep 23, 2026

FTO

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FTO is studied in relation to body weight and energy balance. Common variants can contribute to population-level differences in obesity susceptibility, alongside many other genes and environmental factors. Also called: Fat Mass and Obesity-…

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