Benefits of Vitamin A
Vitamin A is a fat soluble vitamin. Retinol is a type of Vitamin A that can be extracted from animal-based foods. It is found in the liver as well as the other intestinal parts of the animal. Another type of Vitamin A is available in the form of beta carotenes which are found in herbs and other herbivore-based foods. This comes in the form of alpha-carotene, beta-carotene or gamma-carotene. Retinol is currently available in a soluble pill form developed by many drug companies.
Vitamin A food sources are liver, meat, eggs, broccoli, carrots, sweet potato and others which are included in your daily recommended dietary allowance.
Eventhough there are many benefits of vitamin A, an overdose may cause side effects. A deficiency may also produce harmful effects.
The first sign of vitamin A deficiency is night blindness. Eventually, total blindness can occur due to retinal injury. Another sign of deficiency is susceptibility to infections.
Pregnant women who exceed the recommended dietary allowance may cause birth defects in children. And women breast feeding must seek a doctor's advice before taking any vitamin A supplements.
An overdose or toxicity of vitamin is harmful to skin and bones, causing brittleness and weakness. This leads to vomiting and fatigue. Consuming excessive intakes of vitamin A is toxic, and this occurs at dosages exceeding 20-25,000 daily.
Symptoms of a vitamin A overdose includes lethargy, discomfort, lessening appetite, decreased growth, joint soreness, cracked lips, hair loss and skin yellowing.