A supplements with fatty foods, which will help with absorption. Vitamin A needs fat in order to be absorbed properly. Take vitamins A and E together.
Vitamin E is necessary for vitamin A to be properly metabolized.
Take zinc with vitamin A if you are using a zinc supplement. It also helps vitamin A metabolize. Smoking may increase your need. Vitamin A is an antioxidant and can help protect against the free radical damage caused by smoking. Avoid using mineral oil laxatives.