Collagen is a protein found in connective tissues of the body. It is significant in making certain parts of the body such as nails strong and is also an important factor in joint health. Collagen supplements come in various forms.
Calcium supplements are available throughout the United States and Canada in different forms. There are four types of calcium supplements available for purchase. The most frequently used and effective calcium supplements are calcium carbonate and calcium citrate. The other two, calcium gluconate and calcium lactate, contain less elemental calcium are not as readily available as the other types.
Dietary supplements. Supplements typically contain vitamin C in the form of ascorbic acid, which has equivalent bioavailability to that of naturally occurring ascorbic acid in foods, such as orange juice and broccoli [ 13-15 ].ther forms of vitamin C supplements include sodium ascorbate; calcium ascorbate; other mineral ascorbates; ascorbic acid with bioflavonoids; and combination products, such as Ester-CÂ®, which contains calcium ascorbate, dehydroascorbate, calcium threonate, xylonate and lyxonate [ 16 ].