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Nutrient referenceSep 23, 2026
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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
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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
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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
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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
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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
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Provides building blocks for NAD and NADP, which participate in cellular energy reactions. Also called: Vitamin B3 (Niacin), Niacin What it does Provides building blocks for NAD and NADP, which participate in cellular energy reactions. Poss…

Nutrient referenceSep 23, 2026
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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 a plant pigment found in the eye and often paired with lutein…

Nutrient referenceSep 23, 2026
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Supports enzymes, immune function, wound healing and taste. Also called: Zinc Read zinc together with copper Zinc connects with immune function, hormones, copper handling and antioxidant enzymes. A plan for zinc should also account for othe…

Gene referenceSep 23, 2026
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HRH1 is the gene name for Histamine Receptor H1. Learn what a specific result could mean and what to ask about it. Also called: Histamine Receptor H1 Receiving the histamine signal The Purser genetics reference places HRH1 in the histamine-…

Gene referenceSep 23, 2026
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SHMT1 connects serine and glycine with folate chemistry. Also called: Serine Hydroxymethyltransferase 1 Where amino acids meet folate SHMT1 connects serine and glycine with folate pathways. That is one reason both nutrition and genetics can…

Learning essentialsSep 23, 2026
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Understand why Dr. Purser teaches glutathione, SOD and catalase as a connected antioxidant team. Also called: An antioxidant team with different jobs Dr. Purser teaches redox defense as a connected team. SOD handles superoxide and produces…

Report teachingSep 16, 2026
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Explore NAFLD, NASH, MASLD, MASH, hepatitis, the IL-23/IL-17 axis, and liver inflammation. Understand the connection Dr. Purser explores IL-23 and Th17 signaling in fatty liver disease and inflammatory liver conditions. Older terms NAFLD a…

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