Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Amaranthus tricolor (commonly known as Joseph's coat or edible amaranth) is used to support or treat scurvy primarily due to its high vitamin C (ascorbic acid) content. Scurvy is caused by a deficiency of vitamin C, and the most direct and effective treatment is the consumption of vitamin C-rich foods. Multiple scientific analyses have demonstrated that leaves of A. tricolor are an excellent source of vitamin C, with fresh leaves containing between 40–80 mg of ascorbic acid per 100 grams, sometimes higher depending on growing conditions. This concentration is comparable to or exceeds that found in many commonly consumed vegetables.

Historically, edible amaranths have been consumed in Asia, Africa, and the Americas as an important leafy green, especially during periods when other vegetables were less available. While there is traditional consumption, the rationale for its use in scurvy is based on the established scientific understanding of its vitamin C content. Several nutritional studies (see for example, Shukla et al., 2006, and Srinivasan, 2007) have confirmed the efficacy of A. tricolor and related species in providing ascorbic acid through the diet. Therefore, the use of Amaranthus tricolor to prevent or treat scurvy is scientifically justified and supported by direct nutritional analysis, though clinical trials on scurvy treatment with this plant specifically may be limited (as is common for whole foods).

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