Calcium with human health

1. The role of calcium in human health

Calcium is particularly important for bone-tooth formation, coagulation, neuronal signaling and muscle contraction. Calcium is the most abundant mineral in the human body, 99% is concentrated in bones and teeth. Calcium is also capable of lowering blood pressure, but the mechanism of action is unknown. Normally, blood calcium levels are controlled by parathyroid hormone and lack of calcium increases the amount of this hormone. , producing hypertension.

Absorbing enough calcium will limit the risk of cardiovascular diseases in postmenopausal women. By reducing the absorption of oxalte - a substance found in many foods, calcium may reduce the risk of kidney stones. However, people with a history of kidney stones need to be careful, otherwise they will contribute to stone formation.

Calcium is also capable of controlling some fats and cholesterol in the intestinal tract - stomach. Previous studies that admitted calcium supplementation may help reduce blood cholesterol levels. Many experts believe that in the future, people will soon take the role of calcium in ovarian diseases such as polycystic syndrome. In addition, calcium is also resistant to colon cancer. Note that patients with prostate cancer should avoid calcium supplements. Calcium mostly comes from dairy products.

Also available in sardines, salmon, dark green leafy vegetables and tofu. Most studies suggest that calcium citrate / malate (CCM) is more easily absorbed than calcium carbonate. CCM today becomes the calcium recommended by doctors.

Lack of calcium or vitamin D will lead to rickets in children and adults. Because vitamin D is essential for calcium absorption, people with vitamin D deficiency are also deficient in calcium. Vegetarians, dark skinned people, living in the north or all day in the house are very vulnerable to vitamin D deficiency. Vegetarians often absorb calcium below the level of diagnosis. Calcium deficiency in nutrition contributes to osteoporosis especially in Asian women.

2. Human calcium needs

Some foods rich in calcium
(Photo: Irandokht)

The US National Academy of Sciences has recently developed a new guide to calcium absorption, with a minimum of 25-50% higher than previously recommended. Specifically: 19 to 50 years of age need about 1000 mg per day; over 51 years of age need 1200 mg / day. Constipation, edema are sometimes byproducts of calcium supplementation.

Excessive absorption of calcium from dairy products, plus calcium carbonate supplementation is the cause of milk alkaline syndrome. This disease is rarely mentioned today because most doctors do not recommend that patients with ulcers treat this method. People with hyperparathyroidism, chronic kidney disease or kidney stones should not take calcium supplements without the doctor's instructions. For adults the maximum intake is 1200 mg / day.

The most important role of vitamin D is maintaining calcium levels in the blood. So many doctors recommend adding about 400 units of vitamin D every day while taking calcium. In addition, lysine supplementation also increases calcium absorption and may reduce its excretion. Therefore some scientists believe that lysine may be involved in the prevention of osteoporosis.

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