1 Vitamin A deficiency may lead to blindness

Vitamin A is a photosensitive substance that forms the surface of the retina and is one of the indispensable nutrients for protecting the eyes. Lack of it can easily lead to night blindness and dry eye syndrome. , long-term reduction of tear and mucus secretion may cause corneal inflammation, resulting in retinal function damage and blindness.

2 Excessive supplementation may have side effects

Many people will supplement vitamin A to protect their eyes. According to the daily recommended amount, additional vitamin A supplementation should not exceed 500 micrograms. Excessive supplementation may cause stomach pain and diarrhea. Side effects such as vomiting, headache, liver enlargement, and blurred vision; there is no limit to intake from food.

3 It is best to ingest vitamin A from natural foods

Vitamin A is best ingested from natural foods, such as carrots, spinach, red sweet potatoes and other green and yellow vegetables, as well as eggs, milk, Dairy products, etc., are rich in vitamin A and beta carotene, which can maintain eye health.