Why supplement?
Inorganic sulfate
Calcium sulfate is an inorganic sulfate salt. The elemental fraction is relatively high, water solubility is fair, and gut irritation is more noticeable. Taking it with food can ease discomfort. What it supplies is the physiology of calcium itself.
Bone mineralization
Calcium sulfate is a source of calcium. Calcium makes up hydroxyapatite and is absorbed with vitamin D. This salt supplies elemental calcium; after adulthood, calcium alone cannot reverse an established osteoporotic image.
How to take it
A single serving is usually best kept to about 500 mg of elemental calcium.
How oftenPrefer food first and make up any gap from the product label; the usual adult total upper limit is 2,500–2,000 mg/day, depending on age.
What to watch
Cautions
People with kidney stones, high blood calcium, kidney disease, or parathyroid disease should ask a doctor first.
Take calcium supplements apart from iron, levothyroxine, and some antibiotics.
· Constipation
· Stomach discomfort
· Long-term excess may raise the risk of high blood calcium or kidney stones.
Long-term dependenceNot addictive; long-term excess may cause mineral imbalance or kidney stones.

