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

L-Threonine

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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

L-Tryptophan

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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

Turmeric

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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 Turmeric used as a culinary spice. Supplement for…

Nutrient referenceSep 17, 2026

L-Tyrosine

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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

L-Valine

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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

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 17, 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. Food sources Eggs; dairy; liver; orange and dark-green vegetables containing provitamin A carotenoi…

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