THE PURSER WELLNESS LIBRARY

Let’s explore DHEA-S — lab reference

A COURSE FOR YOUR CURIOSITYTestosterone & women’s health

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1292 discoveries for your curiosity186 matching listings grouped; alternative sources stay available.

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Nutrient referenceSep 23, 2026

L-Threonine

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An amino acid used in protein synthesis and other metabolic processes. Also called: Threonine What it does An amino acid used in protein synthesis and other metabolic processes. How supplementation is approached Threonine is an essential am…

Nutrient referenceSep 23, 2026

L-Tryptophan

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An amino acid used in protein synthesis and other metabolic processes. Also called: Tryptophan The serotonin and melatonin connection Dr. Purser’s course connects tryptophan with serotonin and melatonin in its mood/sleep teaching. It asks c…

Nutrient referenceSep 23, 2026

L-Tyrosine

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An amino acid used in protein synthesis and other metabolic processes. Also called: Tyrosine What it does An amino acid used in protein synthesis and other metabolic processes. How supplementation is approached Tyrosine participates in cate…

Nutrient referenceSep 23, 2026

L-Valine

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An amino acid used in protein synthesis and other metabolic processes. Also called: Valine What it does An amino acid used in protein synthesis and other metabolic processes. How supplementation is approached Valine is a branched-chain esse…

Nutrient referenceSep 23, 2026

Vanadium

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A trace element without an established essential dietary role in humans. Also called: Vanadium What it does A trace element without an established essential dietary role in humans. How supplementation is approached Dr. Purser’s course place…

Nutrient referenceSep 23, 2026

Vitamin A

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Supports vision, immune function and tissue development. Also called: Vitamin A What it does Supports vision, immune function and tissue development. Possible deficiency symptoms Deficiency can cause night blindness and eye-surface damage. …

Nutrient referenceSep 23, 2026

Vitamin D

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Helps calcium absorption and bone mineralization. Also called: Vitamin D A nutrient level and a receptor gene answer different questions Dr. Purser places vitamin D in immune, hormone and bone-related teaching. The conversion-genetics chapt…

Nutrient referenceSep 23, 2026

Zeaxanthin

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A carotenoid found in foods and in the retina. Also called: Zeaxanthin What it does A carotenoid found in foods and in the retina. How supplementation is approached Zeaxanthin is an eye-related carotenoid often paired with lutein. Review th…

Nutrient referenceSep 23, 2026

Zinc

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Supports enzymes, immune function, wound healing and taste. Also called: Zinc Read zinc together with copper The course connects zinc with immune and hormone pathways, metallothionein/copper handling and antioxidant systems. Its main practi…

Gene referenceSep 23, 2026

BCO1

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BCO1, also called BCMO1, helps convert beta-carotene from plant foods into retinal, a form used in vitamin A metabolism. Plant carotenoids and preformed vitamin A therefore enter the pathway at different points. Also called: BCMO1, Beta-Car…

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