It is very simple, for the absorption of calcium from our intestine to blood we need estrogens and vitamin D. If you have deficiency of estrogens, vitamin D or both you can also have less absorption of calcium which may lead to osteoporosis.

It is more difficult to keep the absorbed calcium in our body and several factors such as, the amount of calcium or the amount of vitamin D, or sodium or protein has a good or very bad influence on it. Too much from these food or nutrients are bad for calcium metabolism.

The estrogens production is slowly reduced during the pre-menopausal period and in post-menopausal the concentration is very low. Estrogens replacement therapy or enough vitamin D intake is, therefore, very important for women’s health.

The phytoestrogens from soya beans or other vegetables can also replace estrogens replacement therapy.