Ingredient directory

A chelated form of magnesium bound to the amino acid glycine.

Typical: 200–350 mg

Magnesium bound to citric acid, one of the best-selling magnesium forms because it is inexpensive, dissolves readily, and has shown good bioavailability in comparison studies.

Typical: 150–350 mg

The most concentrated and least expensive common calcium salt, supplying about 40% elemental calcium by weight.

Typical: 250–600 mg

The most concentrated magnesium source at about 60% elemental magnesium, which is why it dominates in multivitamins and small tablets.

Typical: 200–350 mg

A calcium salt of citric acid that does not rely on stomach acid to dissolve, so it can be taken with or without food and is often chosen for older adults and people on acid-reducing medication.

Typical: 200–500 mg

Boron supplied as a blend of citrate, aspartate, and glycinate complexes, the usual form in bone, joint, and men's-hormone formulas.

Typical: 3–10 mg

Magnesium paired with malic acid, an intermediate of the Krebs cycle.

Typical: 100–350 mg

Potassium bound to citric acid, about 36% elemental potassium as the monohydrate.

Typical: 99–500 mg

A water-soluble calcium complex formed with both citric and malic acids, originally developed for fortifying juices and later sold as a supplement ingredient.

Typical: 250–500 mg

A whole-bone extract made from bovine bone that keeps the natural hydroxyapatite mineral matrix together with collagen and other bone proteins.

Typical: 250–700 mg

Manganese chelated with glycine, about 15% elemental manganese in commercial grades, used in bone, joint, and antioxidant formulas where manganese serves as a cofactor for enzymes involved in cartilage and bone matrix formation.

Typical: 1–5 mg

A water-soluble manganese salt of gluconic acid with about 11–12% elemental manganese, common in multivitamins and bone formulas as an inexpensive, mild-tasting source.

Typical: 1–5 mg