Maca is a root vegetable and medicinal plant native to the Andes in Peru. It is safe for humans and animals to eat and has been used in Peru long before the Spaniards conquered the area. Ancient warriors used maca to keep their body energetic and vigorous while in battle. It can be low in iodine, so excessive consumption can lead to thyroid problems. Dark coloured maca roots have a significant amount of natural iodine, about 10 grams of dried dark maca contains about 52 milligrams of iodine.

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