There square measure 2 sorts of antiophthalmic factor that square measure found within the diet. Preformed antiophthalmic factor is found in an animal product like meat, fish, poultry, and dairy farm foods.

Provitamin A is found in plant-based foods like fruits and vegetables. the foremost common sort of pro-vitamin A is carotenoid. Vitamin A is additionally obtainable in dietary supplements.

 It most frequently comes within the kind of retinyl acetate or retinyl palmitate (preformed alimentation A), carotenoid (provitamin A), or a mixture of preformed and provitamin A.

Function

Vitamin A helps type and maintain healthy teeth, skeletal and soft tissue, mucous secretion membranes, and skin. it's conjointly called vitamin A as a result of it produces the pigments within the membrane of the attention. Vitamin A promotes sensible visual sense, particularly in low light-weight. It conjointly encompasses a role in a healthy physiological state and breastfeeding.

Vitamin A is found in 2 forms:

Retinol: vitamin A is a lively kind of antiophthalmic factor. it's found in animal liver, whole milk, and a few fortified foods.

Carotenoids: Carotenoids square measure dark-colored dyes (pigments). they're found in plant foods which will be converted into an active kind of antiophthalmic factor. There square measure quite five hundred legendary carotenoids. One such antioxidant is carotenoid. Beta-carotene is an AN inhibitor. Antioxidants defend cells from harm caused by substances known as free radicals.

Free radicals square measure believed to:

• Contribute to bound long diseases
• Play a task in aging
• Eating food sources of carotenoids could scale back the danger of cancer.
• Beta-carotene supplements don't appear to scale back cancer risk.