yes
No.
Yes, you can overdose on water by drinking too much too fast and several people have even died of water poisoning.
yes
Different vitamins you need
Different sources of vitamins
The recommended intake of vitamins vary according to the vitamin. It can range from milligrams to micrograms.
Sperm has Iron
Yes, there are vitamins for diabetes, but they are mostly diet supplements to help vitamin intake, nothing to directly help the symptoms of diabetes.
Excess of vitamin intake or vitamin overdose is called hypervitaminosis. It is a condition of high storage levels of vitamin, which can lead to toxicity.Hypervitaminosis A is an excess of vitamin A, Similarly Hypervitaminosis C an excess of vitamin C, and so on.High or toxic levels of vitamins occur when you have high supplement intake and when you do not take from dietary sources.
water soluble vitamins
poor hair and skin conditions
There does not appear to be an overdose risk to collagen supplements since it is water-soluble and is quickly eliminated from the body. -kira :3