Calcium

DESCRIPTION/FUNCTION

• Calcium is classified as a macromineral. It builds and maintains bones and teeth; essential in blood clotting; influences transmission of ions across cell membranes; required in nerve transmission and muscle contraction; enzyme activation.

DRI (RDA or AI for Adults)

• Under age 51: 1,000 mg.
• 51 years and older: 1,200 mg.

Major Sources

• Lowfat yogurt, sardines w/bones, blackstrap molasses, nonfat milk, whole milk, cheese (Swiss, provolone, cheddar, American, cottage), almonds, spinach, tofu, filberts, Brazil nuts, soynuts, collard greens.

MAINTENANCE/THERAPEUTIC RANGE

• 500 mg to 1,500 mg.

POSSIBLE THERAPEUTIC APPLICATIONS

• Cancer (colorectal)
• High blood pressure
• High cholesterol
• Obesity
• Osteoporosis
• Premenstrual syndrome

COMMENTS

• Calcium bound to organic acids (ascorbic, citric, malic, lactic, etc.) absorbs better than inorganic calcium salts (carbonate) if there is reduced stomach acid production (hypo- or achlorhydria). The carbonate form can cause gastrointestinal problems. Some calcium supplements (bone meal, carbonate) may contain lead, but calcium reduces lead absorption, so this may not be significant at low levels of lead. Vitamin D increases calcium absorption.

CAUTIONS

• Consult with your health practitioner if you have a tendency to form calcium-containing kidney stones.