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Size: 120 Capsules

Price: $23.95

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International Shipping: $13.95 for 1 unit

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Calcium is the most common mineral in the body, and is important for strong bones and teeth. It is also important for muscle contraction, proper nerve function, and blood clotting.

Calcium deficiency causes improper bone formation and stunted growth in children, and osteoporosis (weak, fracture prone bones) in adults.

Excess calcium may cause drowsiness and lethargy, and interferes with absorption of iron, zinc, and manganese.

These involve leeching calcium out of the bones so it can be used in the bloodstream, increasing intestinal absorption, and decreasing losses in the urine.

There is currently much interest in preventing or slowing osteoporosis in post-menopausal women by increasing the intake of dietary calcium.

Strong bones, good nerve conduction, and good muscle contraction are all necessary for peak performance, so sufficient calcium from a variety of food sources should be part of every athlete's diet.

A diet high in protein (typical of many bodybuilders) increases losses of calcium in urine.

You need to maintain constant levels of calcium in your blood. If your blood calcium gets too low, there are homeostatic mechanisms for returning your calcium level to normal.

Similarly, if your blood calcium gets too high, there are homeostatic mechanisms for returning your calcium level to normal. This involves depositing more calcium in your bones and increasing the amount excreted in the urine.

At this point, the question of whether supplementation with calcium beyond the RDA does any good in the fight against osteoporosis has yet to be settled.

Calcium, RDA: 800 mg (male), 800 mg (female)