Supplements

Which Magnesium should I how much? Also, I am 14 years out. Also, my hair started thinning a lot over the past two years. Don't you lose your hair not long after surgery? I never did lose my hair after surgery, but I am doing any and everything I can to thicken my hair. My hair grows long, it's just very thin. I take the required supplements for bariatric patients. I would like to know your opinion about this and advice would be appreciated. Thanks very much.

Monica