Calcium interferes with iron absorption

Calcium interferes with iron absorption

The American Journal of Clinical Nutrition suggests that calcium consumption interferes with iron absorption. Therefore Calcium should be avoided with iron supplement, also do not take iron supplements with milk or other dairy products as they contain plenty of calcium. When you have to drink milk take iron supplements at least an hour before it.

Calcium and iron supplements should, if possible, be taken at different times of the day.

ALL ABOUT CALCIUM SUPPLEMENTS

ALL ABOUT CALCIUM SUPPLEMENTS 

Calcium Citrate e.g. Citracal or Solgar:
• Absorption: Calcium is best absorbed in an acidic environment, hence calcium citrate is the best absorbed supplemental form of calcium. It does not require extra stomach acid for absorption, hence we may take it anytime in a day, even on an empty stomach. 

• Calcium content: Calcium Citrate usually provides less elemental calcium per pill than Calcium Carbonate, therefore one may need to take a relatively more numbers of pills per day to meet the needs.

• Pill Size: Calcium Citrate is usually small in capsule form. 

• If you suffer from acid stomach, it is best to avoid Calcium Citrate.

Calcium Carbonate e.g. Tums or Caltrate, Shell cal
• Absorption: Calcium Carbonate is alkaline based, it requires extra stomach acid for better absorption, hence it is best taken right after meals or with a glass of acidic juice such as orange juice.
• Calcium Content: Calcium Carbonate is the most prevalent calcium supplements in the market . It provides more elemental calcium than Calcium Citrate hence you may not need take as many pills.
• Pill Size: Calcium Carbonate usually comes in a bigger tablet, some people may find it harder to swallow.

Calcium carbonate contains 40 percent elemental calcium, while calcium citrate contains 21 percent elemental calcium. So 1,000mg of calcium carbonate supplies 400mg of elemental calcium, while 1,000mg of calcium citrate contains 210mg.