THE PURSER WELLNESS LIBRARY

Let’s explore 25-hydroxyvitamin D, total — lab reference

A COURSE FOR YOUR CURIOSITYGetting to know your micronutrients

5 chapters, at your pace

Explore the course

498 discoveries for your curiosity16 matching listings grouped; alternative sources stay available.

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Nutrient referenceSep 23, 2026

Arginine

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

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

Inositol

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A compound involved in cell-membrane signaling. Also called: Inositol One nutrient, more than one teaching context The course includes inositol in nervous-system support alongside magnesium, amino acids and omega fats. The combined Genetic/…

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

Manganese

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Helps several enzymes, including a mitochondrial antioxidant enzyme, function. Also called: Manganese The mitochondrial SOD connection The course links manganese to the SOD enzyme family, particularly mitochondrial SOD2. This illustrates th…

Nutrient referenceSep 23, 2026

MK-4 & MK-7

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Are forms of vitamin K2, a family involved in activation of vitamin K-dependent proteins. Also called: MK-4 & MK-7 What it does Are forms of vitamin K2, a family involved in activation of vitamin K-dependent proteins. Possible deficiency sy…

Nutrient referenceSep 23, 2026

Omega-3

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A family of fats that includes ALA, EPA and DHA. Also called: Omega-3 Food source, chemical form and membrane function Dr. Purser’s course connects omega-3s with membranes, brain function and inflammatory/metabolic teaching. FADS1 and FADS2…

Nutrient referenceSep 23, 2026

Selenium

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Is part of proteins involved in thyroid hormone metabolism and antioxidant defense. Also called: Selenium Selenium and the GPX connection Dr. Purser teaches selenium in relation to glutathione peroxidase enzymes and thyroid/redox context. T…

Nutrient referenceSep 23, 2026

L-Serine

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An amino acid used in protein synthesis and other metabolic processes. Also called: Serine An amino acid with two pathway connections The homocysteine chapters place serine in the transsulfuration discussion, while the practitioner course c…

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