To all biotin supplement takers:
How long until you saw results with your hairs strength and growth?
Also, how many mcg do you take daily?
Any side effects?
Thanks in advance!

No one vitamin is really going to improve what you are attempting. You should take a formula that contains something like this for optimal results
Folic Acid 800mcg, Biotin 200mcg, Pantothenic Acid 200mg, vitamin E, Zinc 30mg, Manganese 10mg, Choline 1000mg, Inositol 250mg, Para Amino Benzoic Acid (PABA)60mg