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Too
Much Calcium?
Calcium in supplements,
calcium in cereal, calcium in antacids, in orange juice, on and on, are
promoted. A big question is--can we take too much?
Here is what two
scientist-doctors told Lancet, the British Medical Journal on May 19,
2001* " ...Excess calcium supplementation will ...slow the natural
turnover of bone." Bone naturally reduces density as we age,
and builds anew. This is bone turnover.
They continued, "'aged]
bone is at risk of 'small] fractures. Calcium intakes of 1 to 1.5 grams
daily, commonly recommended for postmenopausal women, are associated
with an increased (emphasis added) rather than a decreased risk of
fracture.
".... International
rates of hip fractures are higher in countries where calcium consumption
is high."
DETAILS: 1000
milligrams equals 1 gram. Many calcium supplements suggest taking 3
tablets, totaling 1000 milligrams. Taking milk and/or cheese would add
to this, as would your basic vitamin supplement and any
calcium-fortified foods. One idea may be to reduce the tablet dosage to
2, and avoid such foods if taking the tablets.
Also, vitamin D aids in
the balance of calcium in the blood (and is anti-cancer.) The
established requirement is 400 milligrams (mgs.) Note the content in
your basic vitamin pill. 800 mgs. would not be excessive, but there is
also D in milk and some cheeses. Taking D with the calcium may be a good
idea, but the report suggests we should limit
calcium to under 1000mgs. As to vitamin
D, the established requirement is 400 mgs. We
would not be concerned about
800mgs., but would keep our intake likewise to
under 1000mg.
Also, magnesium and
boron are helpful in building bone, so one can seek a calcium supplement
containing these minerals. Magnesium has a 400 mg. suggested total
requirement and boron 3 mg. Boron can also be obtained in parsley. Avoid
excessive boron ingestion.
*Drs. Devendra and
Wilkin, Peninsula Medical School, Derriford Hospital, Plymouth PL6 8DH,
UK. They also referenced studies in the International Journal of
Epidemiology, The Journal of Internal Medicine and Clinical Orthopedics
to support their contention.
back
to Vitamins index

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