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A flavonoid present in onions, apples and other plant foods. Also called: Quercetin What it does A flavonoid present in onions, apples and other plant foods. How this fits a treatment plan Quercetin is an educational entry in the antioxidan…

A plant compound found in grape skins and some other foods. Also called: Resveratrol What it does A plant compound found in grape skins and some other foods. How this fits a treatment plan Resveratrol is an educational entry in the antioxid…

…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 Rhodiola extracts and multi-ingre…

… a GPX variant does not prove a selenium deficiency. Review food, multivitamins, thyroid products and separate supplements together. Taking too much selenium can be harmful. How supplementation is approached Dr. Purser connects selenium wit…

…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 L-serine and D-serin…

… 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 dietary deficiency syndrome for this specific botanical or compound. …

…d. Symptoms are not evidence that you need this supplement. Food sources Trace amounts occur in foods and water; there is no established dietary requirement. Supplement forms Supplemental strontium salts are not interchangeable with prescri…

…d. Symptoms are not evidence that you need this supplement. Food sources Broccoli and other cruciferous vegetables supply precursors that can form sulforaphane. Supplement forms Broccoli-derived preparations may supply sulforaphane or its p…

…d. Symptoms are not evidence that you need this supplement. Food sources The body makes SOD enzymes. Eating a food containing SOD does not establish delivery of active enzyme to your tissues. Supplement forms Enzyme-containing products are …

…rption and the clinical setting with a qualified clinician. Food sources Fish, shellfish, meat and dairy contain taurine; the body also synthesizes it. Supplement forms Single-amino-acid products and protein mixtures are different. Check th…

…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 L-threonine may be i…

…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…