Minerals
Minerals are where supplement labels get genuinely confusing, because the form is usually more consequential than the number. Magnesium is sold as citrate, glycinate, oxide and half a dozen others. Iron appears as ferrous sulfate, bisglycinate and others. Zinc comes as picolinate, gluconate and citrate.
Two further traps are worth knowing. The milligram figure on the front sometimes describes the whole compound rather than the elemental mineral it contains, which can differ several times over. And electrolyte products are blends — sodium, potassium and magnesium together — so they are compared per serving, not per mineral.
Filter by brand, strength, format and servings per container to line up comparable products, then open any listing for a full review written from its own label and manufacturer information.
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