Sounds about 13-15 in my opinion
If this is the case then of course she needs to be under moms guidance but hopefully her doctor can help ease any fears.
Here's an article titled "Biotin-rich Foods Essential for a Healthy Pregnancy": http://www.whfoods.com/genpage.php?tname=news&dbid=66 . You see, too little biotin may cause birth defects. It's all about balance.
This is a decision you'll ultimately have to make on your own, really. Even after speaking with your doctor and your mother, you may still have reservations.
Mega-doses of any supplements can be either be harmful, or pointless (because it'll pass through your body). But, I think there is no harm with at least taking your daily recommended amount of biotin in the form of a supplement.
Better yet, try eating more biotin-rich foods if your mother truly objects.
I found a couple of good articles about biotin here: http://www.ovarian-cysts-pcos.com/biotin.html
and here: http://www.whfoods.com/genpage.php?tname=nutrient&dbid=42
I have to keep reminding myself that Biotin is good for more than just hair thickening and strong nails!
Thanks for this, sweetie!
I love to try to be helpful. 
No problem!
Actually, I'm glad I found this information, too, because biotin seems important for women's health issues and the nervous system. I'm also very glad that any biotin not used is always safely excreted.
