Vitamin A has an antioxidant effect, but also produces pigments for the retina and promotes good vision, especially in low light.
A is common in food supplements, but is also associated with vitamin toxicity in extremely high doses. A is not only common, it is also common enough to be common as a supplement and it can cause serious health problems.
Cited Sources:
0
1
2
3
4
5
6
7
8
