Icosin, is usually best taken on an empty stomach in the morning, when it is more easily absorbed. Icosin is also called vitamin AD capsules, mainly to supplement vitamin A and vitamin D. Vitamin A is good for eye and skin development; while vitamin D is mainly to promote calcium absorption to prevent rickets. Vitamin A is good for the development of eyes and skin; and vitamin D is mainly to promote calcium absorption and prevent rickets. After the birth of a small child, the routine is required to supplement vitamin D, otherwise the child will have a calcium deficiency, prone to rickets, mainly manifested in poor night sleep, easy to wake up, occipital baldness, humming, easy to sweat and other abnormalities, usually take the baby more sunshine, can be conducive to the absorption of calcium, to prevent the occurrence of rickets.