No, vitamins are by definition an essential nutrient that cannot be made by the body in sufficient quantities. Vitamin D is not really a vitamin. The human body can produce this nutrient and it is actually a hormone, not a vitamin.
Sorry to say this, still now I didn't hear about B8 Vitamin, but I have some knowledge regarding Vitamin-B. Here I am giving scientific names for Vitamin-B. Vitamin B1 called as thiamine. Vitamin B2 called as riboflavin. Vitamin B3 called as niacin or niacinamide. Vitamin B5 called as pantothenic acid. Vitamin B6 called as pyridoxine, pyridoxal, or pyridoxamine. Vitamin B7 called as biotin. Vitamin B9 called as folic acid. Vitamin B12 called as cobalamin; commonly cyanocobalamin in vitamin supplements.
called hypervitaminosis or vitamin poisoning
Vitamin C
Vitamin D3, also called cholecalciferol is another form of the vitamin D.It's the sunshine vitamin.
Yes, why else would it be called vitamin D if not?
Riboflavin, also called vitamin B2, is a water-soluble vitamin.
Vitamin K is commonly called the 'Blood-Clotting' vitamin.
Vitamin C
its is called vitamin A
Vitamin B complex is a group of water soluble substances. These are: Vitamin B1 is called Thiamine. It's deficiency causes Beriberi desease and Wernicke's encephalopathy. Vitamin B2 is called Riboflavin Vitamin B4 is called Nicotinic acid. It's deficiency leads to Pellagra desease. Vitamin B6 is called Pyridoxine
In the US Army, we used to call Motrim, Vitamin M because it was "supposed" to cure everything. "Take some Vitamin M and see me tomorrow!"
Yes, the vitamin is called vitamin f. F for fat.