Calcium
Ca
Definition
The main mineral in bones and teeth. Abundant in milk, dairy, dried anchovies, tofu and leafy greens.
In the body
Maintains bone density and takes part in muscle contraction, blood clotting and nerve signaling. Needs vitamin D to be absorbed well.
Watch out for
Excess from supplements raises the risk of kidney stones. High sodium and caffeine intake increase calcium loss.
Too few products list this one, so there is no overall ranking.