THE PURSER WELLNESS LIBRARY

Let’s explore food storage

125 discoveries for your curiosity

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Nutrient referenceSep 17, 2026

Iodine

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…ired thyroid hormone production. Symptoms are not specific. Food sources Iodized salt; dairy; seafood; eggs. Seaweed iodine content varies greatly. Supplement forms Potassium iodide and sodium iodide. Before taking a supplement Excess iodin…

Nutrient referenceSep 17, 2026

Iron

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… reduced exercise tolerance and, sometimes, cravings for nonfood substances. Food sources Meat; seafood; lentils; beans; iron-fortified cereals. Vitamin C helps absorption of plant iron. Supplement forms Ferrous sulfate, fumarate and bisgly…

Nutrient referenceSep 17, 2026

Isoleucine

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…rption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, dairy, soy and legumes supply amino acids. The body also makes some amino acids. Supplement forms Single-amino-acid pr…

Nutrient referenceSep 17, 2026

Lavender

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…d. Symptoms are not evidence that you need this supplement. Food sources Usually encountered as an herbal preparation or concentrated extract, rather than a source of an essential nutrient. Supplement forms Oral, topical and aromatic prepar…

Nutrient referenceSep 17, 2026

Leucine

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…rption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, dairy, soy and legumes supply amino acids. The body also makes some amino acids. Supplement forms Single-amino-acid pr…

Nutrient referenceSep 17, 2026

Lipoic Acid

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…d. Symptoms are not evidence that you need this supplement. Food sources Small amounts occur in foods such as organ meats and vegetables; it is also made in the body. Supplement forms Alpha-lipoic acid and R-lipoic acid products. Before tak…

Nutrient referenceSep 17, 2026

Lithium

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…d. Symptoms are not evidence that you need this supplement. Food sources Trace amounts occur in water and food. This does not establish a need for a lithium supplement. Supplement forms Prescription lithium salts and over-the-counter lithiu…

Nutrient referenceSep 17, 2026

Lutein

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A carotenoid found in foods and in the retina. Also called: Lutein What it does A carotenoid found in foods and in the retina. What symptoms can—and cannot—tell you There is no established dietary deficiency syndrome for this specific botan…

Nutrient referenceSep 17, 2026

Lycopene

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…d. Symptoms are not evidence that you need this supplement. Food sources Tomatoes, watermelon and pink grapefruit. Supplement forms Tomato extracts and lycopene supplements. Before taking a supplement Concentrated supplements can interact w…

Nutrient referenceSep 17, 2026

L-Lysine

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…rption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, dairy, soy and legumes supply amino acids. The body also makes some amino acids. Supplement forms Single-amino-acid pr…

Nutrient referenceSep 17, 2026

Magnesium

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…al heart rhythms. These symptoms have many possible causes. Food sources Pumpkin seeds; almonds; spinach; beans; whole grains. Supplement forms Citrate, chloride, oxide and glycinate are examples. The label reports elemental magnesium. Befo…

Nutrient referenceSep 17, 2026

Maitake

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…d. Symptoms are not evidence that you need this supplement. Food sources Cooked maitake mushrooms. Supplement forms Culinary mushrooms, powders and concentrated extracts differ. Before taking a supplement Concentrated supplements can intera…

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