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

Arginine

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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

Asparagine

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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

Astaxanthin

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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 Salmon, trout, shrimp and other seafood; certain …

Nutrient referenceSep 17, 2026

Açaí 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 Açaí pulp, puree and unsweetened frozen fruit. Su…

Nutrient referenceSep 17, 2026

Beta-Carotene

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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 Carrots, sweet potatoes, pumpkin and dark leafy g…

Nutrient referenceSep 17, 2026

Biotin

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…zymes process fats, carbohydrates and amino acids. Possible deficiency symptoms Rare deficiency may cause hair thinning, rash and neurological symptoms. Hair loss alone does not establish deficiency. Food sources Cooked eggs; nuts; seeds; f…

Nutrient referenceSep 17, 2026

Boron

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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 Prunes, raisins, avocados, nuts and legumes. Supp…

Nutrient referenceSep 17, 2026

Calcium

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…and teeth and supports muscle and nerve signaling. Possible deficiency symptoms Long-term low intake can affect bones without obvious symptoms. Low blood calcium has multiple causes and is not equivalent to low dietary intake. Food sources …

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