THE PURSER WELLNESS LIBRARY

Let’s explore Vitamin E, alpha-tocopherol — lab reference

A COURSE FOR YOUR CURIOSITYGetting to know your micronutrients

5 chapters, at your pace

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768 discoveries for your curiosity62 matching listings grouped; alternative sources stay available.

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Gene referenceSep 23, 2026

TNF

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TNF encodes tumor necrosis factor, an immune-signaling protein involved in inflammation, host defense and regulation of cell survival. Its name should not be read as proof that a TNF result indicates cancer. Also called: Tumor Necrosis Fact…

Gene referenceSep 23, 2026

IL4

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IL4 encodes interleukin-4, a cytokine involved in Th2 immune responses and antibody class switching, including pathways related to IgE. It operates alongside IL-5 and IL-13 rather than representing all allergic biology by itself. Also calle…

YouTubeJan 5, 2026

What Causes Chronic Fatigue Syndrome?

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Do you know what causes chronic fatigue? Dr. Purser explains the top causes of Chronic Fatigue Syndrome (CFS) and shares what steps to take to feel normal again. Discover why CFS is a symptom of underlying conditions and what the treatment of underlying causes of CFS includes. Dr. Purser dispels the myth of medication deficiency related to CFS symptoms. Discover the relationship of nutritional deficiencies, hormone imbalance, and poorly understood genetic causes from MTHFR deficiency to fatigue. Learn what contributes to fatigue when the absorption of Vitamin B12, folate, pantothenate, and oth

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