THE PURSER WELLNESS LIBRARY

Let’s explore Vitamin B12 — lab reference

A COURSE FOR YOUR CURIOSITYMethylation & B vitamins

4 chapters, at your pace

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707 discoveries for your curiosity54 matching listings grouped; alternative sources stay available.

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Gene referenceSep 23, 2026

HLA-DQA2

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…rder. CD4 T cells are helper T cells; they should not be mislabeled as the usual cytotoxic CD8 T-cell group. A question to bring to your visit Does this specific HLA marker have a validated clinical interpretation for the question being inv…

Gene referenceSep 23, 2026

HRH1

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…eptor H1 Receiving the histamine signal The Purser genetics reference places HRH1 in the histamine-response part of the MCAS discussion. H1 receptors help mediate histamine effects; they are not the enzymes that make histamine or break it d…

Gene referenceSep 23, 2026

HRH2

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…stamine also connects to stomach acid Dr. Purser’s genetics reference connects HRH2 with histamine signaling and gastric acid secretion. H2 is a receptor, so this teaching concerns response to a signal rather than histamine production by HD…

Gene referenceSep 23, 2026

KIT

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…sted in inherited DNA or affected tissue, and what does the laboratory classify the variant as? Variant IDs in the teaching reference: rs121913507, rs3822214

Gene referenceSep 23, 2026

MAOA

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…ombined Genetic/CMA SOP brings this pathway together with B vitamins, magnesium, inositol, amino acids, omegas and redox findings. The purpose is to understand an individual pattern and tolerance. A gene result does not measure neurotransmi…

Gene referenceSep 23, 2026

MTHFD1L

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…ser connects the pieces Follow the connection to folate availability and the cellular processes that use one-carbon units. The pathway provides context, but it cannot tell you from the gene name alone whether homocysteine is elevated or how…

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