Hi Lifedream,
"If you are 83 and never taken supplements, that not a ligit argument against supplementation."
Let us discuss this a little further, Okinawan elders are the longest lived people in the world Ref. The Okinawa Program. - A twenty five year study by Dr Bradley J. Willcox MD,MSc, Dr Craig Willcox PhD, Dr Makoto Suzuki MD,PhD, and guess what none of the centenarians took supplements.Okinawans men get about 625mg and women about 400mg per day in their diets, which would be equivalent to 900 mgs for men in a 2,000 calorie diet, 730 for females, the Okinawans also would have ingested an unmeasured amount of calcium from their water supply because the soil is calcium rich.
Women reach 99% of peak bone mass by twenty two years of age and after that you are only trying to slow down bone loss, calcium intake is important for sure to help arrest this.
A typical American diet yields about 800mgs of calcium daily, and I believe people are eating less calcium today than what they were eating 50 years ago where every family had a back yard garden that included good sources of calcium such as beans, and often a backyard cow, or goat.
Over consumption of calcium supplements can be dangerous, no one has ever got into trouble, that I am aware og by dietary sources of calcium, but they certainly have with supplements. The Massai in Africa ingest about 5000 mgs of calcium daily, about ten times what the Americans ingest without any problems Ref, the same study as quoted earlier. These three research scientists recommend 1200mg to 1,500mg per day for women 11 to 23 years of age, men the same and 1000mg for women over 25years, lactating or pregnant women should also get 1200 to 1500mgs, including what you are getting in your diet.
Hypercalcemia achieved by supplementation causes severe problems such as lax muscle tone, constipation , large urine volumes, nausea and ultimately death, and I neglected to mention the possible link with kidney stones which are mostly composed of calcium oxalate.
I have a patient now so I have to go, so sensible advice would be to get some tests done by your doctor and see if you need supplements, don't listen to salesmen/women.
Cheers