You should not take more than 1.5mg of vitamin A per day.

Too much vitamin A is also dangerous to one's health.

Choose at least one source of vitamin A every other day.

They may also have problems with memory, because vitamin A is important for the brain.

The use of vitamin A in treatment has been investigated.

Vitamin A is also needed for normal growth and good vision.

Too much vitamin A can lead to toxic side effects, however.

"Vitamin A in these patients is a bad idea," she says.

Before taking vitamin A, tell your doctor about all other medicines you use.

Vitamin A is also necessary for healthy growth of cells.