Supplement Label Index

Compare supplement forms

Magnesium glycinate or oxide? Methylcobalamin or cyanocobalamin? Each comparison puts two forms side by side: cited quality tier, how much of the nutrient each actually delivers by weight, how common it is on US labels, and the doses brands declare.

Ashwagandha (Withania somnifera)

Calcium

Choline

Chromium

Copper

Creatine

Folate (Vitamin B9)

Glucosamine

Iodine

Iron

Magnesium

Manganese

Omega-3 Fatty Acids (EPA + DHA)

Potassium

Selenium

Vitamin A

Vitamin B12 (Cobalamin)

Vitamin C

Vitamin E

Zinc