Beta-carotene (provitamin A) is a fat-soluble form of vitamin A (retinol). It is a necessary vitamin for the development and acquisition of proteins, necessary to rebuild a bone structure. Irreplaceable in the treatment of eye diseases (prevents decrease of vision and so called night blindness). It strengthens the immune system. It is a strong oxidant. In its natural form it can be found found only in plants (unlike retinol, which is present in foods of animal origin) such as chard, squash, kale, carrots, apricots, tomatoes). Available in the form of supplements and nutrients as an essential component of the sports diet.