I am loosing a lot of hair. i had a histerectomy in 2018. i am using the best hair loss product on the market and vitamines for hair and nails but it doesn't help.

Possible causes...: One's primary care doctor can check for medical causes. If none are found, then one can see a dermatologist, especially one specializing in hair restoration (some treatments: minoxidil, etc, ...). Medical causes may include: hormonal problems (such as low thyroid), seborrhea, alopecia areata, a stressful illness. Other causes include: genetic male/female pattern baldness, telogen effluvium, etc...