Melatonin A hormone that is used clinically to induce sleep. Available in pure form from several companies. Monoterpenes Fragrant essential oils. Monoterpenes include limonene, perillyl alcohol, and geraniol. Proanthocyanidins Flavonoids that are used to treat venous problems and other conditions.
Standardized extracts are available from several companies.
Usually these are made from pine bark or grape pips. Quercetin A flavonoid found in many plants. Extracts standardized for greater than 90 quercetin are available from several companies. Resveratrol A compound found in wine and grapes, in the herb Polygonum cuspidatum, and in other herbs. Selenium A trace element that plays a role in the body's antioxidant system.