
Vitamin A is important for vision, adequate growth, and for young cells to know what type of tissue to become. Vitamin A is essential in the conversion of cholesterol into female estrogens and male androgens.
Sources include dark green vegetables, deep yellow fruits, butter, cabbage, carrots, egg yolks, fish, liver, meat, whole milk etc.
Deficiency of Vitamin A may lead to symptoms such as brittle finger nails, diarrhea, rough, dry, or prematurely aged skin, frequent fatigue, lack of tear secretion, loss of a sense of smell, night blindness, poor bone growth, skin blemishes, softening of bones and teeth, and weak tooth enamel.