Onion contains high amounts of sulfur. Sulfur is known as the beauty mineral. It is necessary for formation of collagen and for the maintenance of the skin, hair, and nails. Dry skin, brittle hair, hair loss and weak nails could be a sign of sulfur deficiency. Using raw onion for hair loss is a form of herbal folk medicine that is still being used today. In fact, onion juice is an ingredient in several topical hair growth lotions on the market today.

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