By Elaine WATSON Elaine WATSON, 14-Aug-2013. The FDAâs decision to give the thumbs up to spirulina as a source of blue color in candy and gum finally gives US firms a natural alternative to artificial FD&C Blue #1 ('brilliant blue') and opens up new opportunities in natural greens, say color suppliers.
Actually I just looked it up to make sure and yes biotin is created in the large intestine by bacteria. Also vitamin K is as well, but vitamin K is a fat soluble vitamin where biotin is water soluble. Source(s): http://www.vivo.colostate.edu/hbooks/pat... Plus having CF makes me take a lot of vitamins plus its an interesting topic to me.
1 The difference (if any) between vitamins that are water soluble and those that are not -- There is a big difference between the water soluble vitamins and the fat soluble vitamins and this is absolutely a critical distinction.  2 Specifically Vitamin E -- Vitamin E is a fat soluble vitamin. Specifically Vitamin E -- Vitamin E is a fat soluble vitamin. 2  Although it can be water solubilized in the lab to help its absorption through the intestinal wall, once it is absorbed into the body it would appear to behave as a fat soluble vitamin does.