THE PURSER WELLNESS LIBRARY

Let’s explore Understanding a nutrient deficiency

A COURSE FOR YOUR CURIOSITYGetting to know your micronutrients

5 chapters, at your pace

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389 discoveries for your curiosity50 matching listings grouped; alternative sources stay available.

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Nutrient referenceSep 17, 2026

Frankincense

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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 Not an everyday food source. Essential oils and i…

Nutrient referenceSep 17, 2026

L-Glutamine

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…e or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, d…

Nutrient referenceSep 17, 2026

Glycine

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…e or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, d…

Nutrient referenceSep 17, 2026

Goji Berry

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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 Goji fruit, often sold dried. Supplement forms Dr…

Nutrient referenceSep 17, 2026

Green Tea

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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 Brewed green tea. Supplement forms Tea beverages …

Nutrient referenceSep 17, 2026

Histidine

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…e or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, d…

Nutrient referenceSep 17, 2026

Inositol

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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 Beans, whole grains, nuts and fruit; the body als…

Nutrient referenceSep 17, 2026

Iodine

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…e What it does Is needed to make thyroid hormones. Possible deficiency symptoms Low intake can contribute to an enlarged thyroid and impaired thyroid hormone production. Symptoms are not specific. Food sources Iodized salt; dairy; seafood; …

Nutrient referenceSep 17, 2026

Iron

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…carry oxygen and supports many cellular processes. Possible deficiency symptoms Iron deficiency can cause fatigue, weakness, reduced exercise tolerance and, sometimes, cravings for nonfood substances. Food sources Meat; seafood; lentils; be…

Nutrient referenceSep 17, 2026

Isoleucine

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…e or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, d…

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