Yes it is.
no, that's vitamin C's job. Vitamin A helps with eyes
Vitamin A is required for night vision, as well as a healthy skin. As a result of its antioxidant properties it helps the immune system in protecting against pollution, cancer formation and other diseases. It also helps with the sense of taste as well as digestive and urinary tract, Many also believe that it helps slow aging.
It is needed for development and maintenance of the epithelial cells in the mucus membranes and is important in the development of bones and teeth, storage of fat and the production of protein and glycogen.
The integumentary system provides vitamin D for proper calcium absorption.
NO,it needs vitamin D
I believe it is Vitamin D
vitamin c
Gastric acid
very important because they help the proper functioning of the body, for e.g. vitamin D and calcium. calcium is needed for building bones, for functioning of muscles, heart to pump etc, now vitamin D is needed for the proper absorption of calcium from intestine. deficiency of either of these especially in children who have a faster rate of growth can cause improper growth of bones a disease called rickets!
villi
vitamin d
People who live in the north have a decreased amount of sunlight exposure. Vitamin D is manufactured by skin cells when exposed to sunlight, and is needed for absorption of dietary calcium.
Vitamin D aids in the absorption of calcium, which will make bones stronger, and helps regulate mineralization of calcium and phosphate. It is found in flour, milk, fatty fish, mushrooms, eggs and meat.
Calcium is necessary for maintaining the strength of teeth and bones, so a deficiency in calcium would be a primary cause of breakage of either. Vitamin D is also needed for absorption of calcium.
Vitamin D and Calcium
Calcium
Several vitamins help to maintain healthy skin, bones, and eyes. These include vitamin D, vitamin E, and vitamin A along with niacin.
calcium and vitamin d
Vitamin C is needed for the absorption and uptake of iron. Iron supplements alone are often ineffective without adequate levels of vitamin C in the body.