But some vitamins, especially fat-soluble ones that are stored in the liver, can be harmful if taken in excess. Taking too much vitamin a can lead to headaches, skin changes and liver damage.

但是一些维生素，特别是脂溶性维生素在肝脏中储存，补过了就会影响健康。

youdao

Get some sun when you can. Not to excess, but a little sun is good for you. Your body USES it to make Vitamin d.

可能的话获得一些阳光。不要过量，一点点阳光对你有好处。你的身体靠用阳光制造出维生素d。

youdao

We do know that sun exposure will ensure an adequate level of vitamin D and because of a clever regulatory mechanism, will never result in excess vitamin D.

FORBES: Vitamin D: Still More Questions Than Answers