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Approved lab referenceFrom the archive
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Purser Wellness reference range Unit: ng/mL / Z-score Male: Age-specific; Z -2 to +2 Female: Age-specific; Z -2 to +2 How to read this marker Age, sex, nutrition, liver disease, diabetes, and assay matter. The wider testing context For …

Books & reading guidesFrom the archive
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Chapter 14: Homocysteine Elevation, Inflammatory Markers, Transsulfuration Pathway Disruption, and Toxicant Exposures in Genetic Hyperhomocysteinemia Homocysteine and environmental exposures Why this matters Separate questions about toxin…

Books & reading guidesFrom the archive
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Homocysteine-Treatment-Steps-Flow-Chart Homocysteine: a map of the practice flow chart Why this matters Follow the questions linking symptoms, genetics, homocysteine, and immune signals. How the pieces connect A flow chart can help organ…

Report teachingOct 2, 2026
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This TNF promoter variant appears in Dr. Purser’s discussion of inflammatory signaling.

Gene referenceSep 23, 2026
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The genetic-architecture chapter explains that S-adenosylmethionine (SAM) donates methyl groups and becomes S-adenosylhomocysteine (SAH).

Gene referenceSep 23, 2026
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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.

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