Some basics on Vitamin A...

Moving into the fat soluble vitamins which are A, D, E and K. They differ in many ways, but the most important is that because they are stored in our liver and fat tissue our bodies will pull from storage if we don't get them any given day. The negative to this is that because they are stored the risk of toxicity is greater than water-soluble vitamins and also you can go sometimes years without knowing you have a deficit. There are three forms of vitamin A - retinol, retinal, and retinoic acid. Beta carotein is a precursor to vitamin A.

Its major roles in the body are: vision (maintains your cornea); protein synthesis and cell differentiation (helps maintain your epithelial tissues which include things like your skin and GI tract and glands. Epithelial tissues are on all body surfaces - inside and out) and supports reproduction and bone and tooth growth.

Some deficiency symptoms are night blindness, corneal drying and a host of other cornea problems until blindness; and impaired immunity.

Toxicity can lead to reduced bone density, liver abnormalities and birth defects.

Sources: fortified milk and milk products, eggs, liver, dark leafy greens, vegetables (squash, carrots, sweet potatoes, pumpkin), deep orange fruits (cantaloupe, apricots)