Biotin
Hair loss is fairly common post op and there’s not a whole lot you can do about it unfortunately. Either it’s going to happen or it won’t and the degree of hair loss varies per person. Vitamins help somewhat, but you’re going through something that’s medical in nature and it’s a response to the trauma your body went through coupled with the resources it requires to heal. You’re going through something called telogen effluvium, and I know it’s scary but you just need to breathe and wait it out. I took Hair Skin and Nail supplements for Bariatric patients and I still suffered about 30% hair loss. I believe it did help though but again… it won’t stop it entirely or prevent it.