THE PURSER WELLNESS LIBRARY

Let’s explore 1,25-dihydroxyvitamin D — lab reference

A COURSE FOR YOUR CURIOSITYGetting to know your micronutrients

5 chapters, at your pace

Explore the course

555 discoveries for your curiosity21 matching listings grouped; alternative sources stay available.

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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

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

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-…

Gene referenceSep 23, 2026

FUT2

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Dr. Also called: Fucosyltransferase 2 The mucosal and microbiome connection Dr. Purser’s course places FUT2 in its gut–immune map. FUT2 concerns secretor biology and the surface environment of mucosal tissues, helping explain why it appears…

Gene referenceSep 23, 2026

G6PC2

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G6PC2 encodes a glucose-6-phosphatase-related protein expressed in pancreatic islet cells. Common variation is associated with differences in fasting glucose regulation; it is not the insulin receptor. Also called: Glucose-6-Phosphatase Cat…

Gene referenceSep 23, 2026

GAD2

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GAD2 belongs to the glutamate decarboxylase family discussed in the course’s GAD/GABA teaching. Also called: Glutamate Decarboxylase 2 Another part of the GABA system GAD2 belongs to the glutamate decarboxylase family discussed in the cours…

Gene referenceSep 23, 2026

GCLC

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Dr. Also called: Glutamate-Cysteine Ligase Catalytic Subunit Making glutathione is a process Dr. Purser groups GCLC and GCLM as glutathione-synthesis machinery. GCLC supplies the catalytic component of the first enzyme step in glutathione s…

Gene referenceSep 23, 2026

GCLM

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Dr. Also called: Glutamate-Cysteine Ligase Modifier Subunit Making glutathione is a process Dr. Purser groups GCLC and GCLM as glutathione-synthesis machinery. GCLM supplies the modifier component that helps regulate that same glutathione-s…

Gene referenceSep 23, 2026

GDF5

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GDF5 encodes growth differentiation factor 5, a signaling protein involved in skeletal development, joint formation and cartilage biology. Its name does not mean a SNP measures the ability to build muscle. Also called: Growth Differentiatio…

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