THE PURSER WELLNESS ENCYCLOPEDIA

Let’s explore “Understanding a nutrient deficiency”

A RELATED COURSEGetting to know your micronutrients

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Nutrient referenceSep 23, 2026

Shiitake

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…APA result. A cell-response finding is not a diagnosis of a deficiency in this botanical or compound. Shiitake mushrooms used as food differ from concentrated mushroom extracts. What symptoms can—and cannot—tell you There is no established…

Nutrient referenceSep 23, 2026

Strontium

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…oms can—and cannot—tell you There is no established dietary deficiency syndrome for this specific botanical or compound. Symptoms are not evidence that you need this supplement. Food sources Trace amounts occur in foods and water; there is …

Nutrient referenceSep 23, 2026

Sulforaphane

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…APA result. A cell-response finding is not a diagnosis of a deficiency in this botanical or compound. Broccoli-derived preparations may supply sulforaphane or its precursor glucoraphanin, sometimes with myrosinase. These labels are not int…

Nutrient referenceSep 23, 2026

Turmeric

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…APA result. A cell-response finding is not a diagnosis of a deficiency in this botanical or compound. Turmeric as a spice differs from concentrated curcumin extracts, especially formulas with absorption-enhancing ingredients. What symptoms…

Nutrient referenceSep 23, 2026

Vanadium

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…oms can—and cannot—tell you There is no established dietary deficiency syndrome for this specific botanical or compound. Symptoms are not evidence that you need this supplement. Food sources Trace amounts occur in foods such as mushrooms, g…

Nutrient referenceSep 23, 2026

Vitamin A

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…ts vision, immune function and tissue development. Possible deficiency symptoms Deficiency can cause night blindness and eye-surface damage. How supplementation is approached Distinguish preformed vitamin A from beta-carotene and review exi…

Nutrient referenceSep 23, 2026

Zeaxanthin

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…ntioxidant-response category does not diagnose a zeaxanthin deficiency or set a treatment schedule. What symptoms can—and cannot—tell you There is no established dietary deficiency syndrome for this specific botanical or compound. Symptoms …

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