THE PURSER WELLNESS ENCYCLOPEDIA

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Nutrient referenceSep 23, 2026

Beta-Carotene

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A carotenoid that the body can convert to vitamin A. Also called: Beta-Carotene What it does A carotenoid that the body can convert to vitamin A. How supplementation is approached Distinguish plant beta-carotene from preformed vitamin A bef…

Nutrient referenceSep 23, 2026

Biotin

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Helps enzymes process fats, carbohydrates and amino acids. Also called: Biotin What it does Helps enzymes process fats, carbohydrates and amino acids. Possible deficiency symptoms Rare deficiency may cause hair thinning, rash and neurologic…

Nutrient referenceSep 23, 2026

Boron

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… trace element found in food; a human dietary requirement has not been established. Also called: Boron What it does A trace element found in food; a human dietary requirement has not been established. How supplementation is approached Boron…

Nutrient referenceSep 23, 2026

Calcium

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Provides structure for bones and teeth and supports muscle and nerve signaling. Also called: Calcium What it does Provides structure for bones and teeth and supports muscle and nerve signaling. Possible deficiency symptoms Long-term low int…

Nutrient referenceSep 23, 2026

Chromium

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A trace element marketed in supplements; its essential role in humans remains under discussion. Also called: Chromium What it does A trace element marketed in supplements; its essential role in humans remains under discussion. How supplemen…

Nutrient referenceSep 23, 2026

Copper

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Supports iron handling, connective tissue and antioxidant enzymes. Also called: Copper Copper amount and copper handling are different questions Dr. Purser’s course discusses copper, zinc and metallothionein in its fibromyalgia and mineral …

Nutrient referenceSep 23, 2026

Cysteine

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An amino acid used in protein synthesis and other metabolic processes. Also called: Cysteine A building block for glutathione Dr. Purser’s course connects cysteine and NAC with the raw-material side of glutathione production. CBS and CTH he…

Nutrient referenceSep 23, 2026

L-Glutamine

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An amino acid used in protein synthesis and other metabolic processes. Also called: Glutamine What it does An amino acid used in protein synthesis and other metabolic processes. How supplementation is approached Review glutamine within prot…

Nutrient referenceSep 23, 2026

Iron

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Helps hemoglobin carry oxygen and supports many cellular processes. Also called: Iron Energy is not enough reason to add iron Dr. Purser’s course connects iron with oxygen transport and energy while identifying it as a safety-sensitive mine…

Nutrient referenceSep 23, 2026

Isoleucine

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

Nutrient referenceSep 23, 2026

Leucine

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

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