When should I start taking Biotin to prevent hair loss?(I have very thick hair)

I started before surgery.and still take it and im.almost 4 months out. I just had my hair cut yesterday and ask my stylist if she.noticed hair loss and she said no,just a little dryness on the ends,but I color my hair so that is expected.I also make sure I get at least 40 grams of protein a day

I'm curious what kind of biotin to take. Are they big pills? Liquid? Chewables? I have a lot of hair and it's falling out in clumps. Thank god I have so much that you can't tell but I'm done cleaning up all the hair laying around.

2 a day

Walmart for $14 I think

I've been taking them since 2 months pre op- not sure I'll ever stop'

I started taking 2 a day 4 months ago I'm still pre op and already have thin hair thanks to pcos. I have noticed new growth.

most of the time you can get them buy one get one free,look at kroger, or one their family of stores, or at walgreens CVS etc,usually can find good deals on them somewhere