A recent review conducted the by National Osteoporosis Foundation (NOF) stating that they didn't see any relations between the calcium supplements and heart attacks or having a stroke. Pfizer Consumer Healthcare which produces calcium supplements funded the review of the NOF. The review says that as long as the consumers of the calcium supplements don't go overboard and remember that supplements are considered "safe from cardiovascular standpoint" say the guidelines from NOF and American Society for Preventive Cardiology.

The recent review clearly contradicts with a lot of studies conducted regarding whether the calcium supplements contribute to any heart failures and diseases or stroke. According to Taylor Wallace an affiliate professor at George Mason University in Fairfax, one of the authors of the guidelines says that supplements can make used to 'fill any gaps' in a person's diet.

Not everyone agreed though and insisted that getting calcium from foods like milk, tofu, and yogurt, are still preferred. As the review shows that the calcium-rich food is safe for the heart, according to Dr. Erin Michos an associate director of preventive cardiology at John Hopkins University. In her own study that published just this month shows that one quart of the supplement users is more likely to develop calcium buildup in the arteries of their heart over 10 years than the non-users, WebMD reports.

There are other several reasons as to why calcium supplements needed to view with precautions; more likely to cause constipation, kidney stones, and bloating and preventing bone fractures is not very clear, says Dr. Erin Michos.

Another updated research review was done by the independent researchers at Tufts University School of Medicine in Boston to develop new guidelines and analyzed 31 studies. Some are older adults that randomly assigned to take calcium with or without vitamin D and four of them were clinical trials. The review shows that none of the clinical trials are connected to any higher risk of heart diseases for the supplement users, via Health Day.

According to the institute of Medicine, younger adults should only take 1,000 mg of calcium supplement a day. 1,200 mg per day aged 50 years for women and men older than 70 as given the higher chance of bone thinning, according to IOM.

The guideline specifies that people should intake calcium from food and supplements below the tolerable upper level that is set at 2,000 - 2,500 mg per day, IOM says.