This is rather rare! Biotin deficiency is a little difficult to come across because intestinal bacteria produce it in excess of daily requirement. No don’t be alarmed. Biotin is water soluble and the unused portion gets removed from the body via urine or sweat. But in case of a biotin deficiency which may be the result of your body not being able to absorb biotin, you need to see a doctor who will prescribe a biotin supplement amongst other things.
Another thing to note here is that since the excess biotin is excreted out of the body, there really is no fear of a biotin over dose. Many health institutions don’t have a set dosage for biotin for that precise reason. Also there are no side effects to excess biotin. It will get metabolized or removed from your system.
Now you have a clear picture of what biotin can do for you. But as with any thing new for your body, do consult your doc before you take this head on.