I take 5000 mg twice day but not liquid . It very much helps with hair , nails and even skin. I have not been sleeved yet so we will if still does in few months .
It won't help with the loss (no amount of anything will), but it will help with regrowth. I have taken it since my hair started falling out and my regrowth is coming back really fast and as a bonus, my nails are hard as concrete!
My hair is falling out like crazy too! I ordered 5000 mcg of biotin that dissolves under the tongue. Its from Natrol...I get my b12 fast dissolve in that brand also.