concern is usually high-dose or prolonged supplementation, particularly in people who already have liver or kidney disease.
Here are nine vitamins and supplements worth using carefully.
1. Vitamin A
Vitamin A is essential for vision, immunity, reproduction, and normal cell growth.
However, excessive intake of preformed vitamin A, such as retinol or retinyl palmitate, can accumulate in the body because vitamin A is fat-soluble.
Very high or prolonged doses can potentially cause:
- liver enzyme abnormalities
- liver injury
- headaches
- nausea
- bone problems
- dry or peeling skin
The risk mainly applies to
