could the biotin be having an effect already?

i am FTM trans and pre testosterone. i have some natural facial hair (me and my family think i have naturally high T levels based on this and other things) that is actual hair and not fluff. the hairs are thin and not very visable so i thought i would give high strength biotin a go (i have problems with my nails falling out due to health issues so im hoping this might help them stay in). i started on tuesday and it is saturday now, i know it takes a while to work but i swear o have some new hair growth that would not normally have grown in that time.