Gastric Bypass Surgery Support Group
Gastric bypass (GBP) is any of a group of similar operative procedures used to treat morbid obesity, a condition which arises from severe accumulation of excess weight in the form of fatty tissue, and the health problems ("co-morbidities") which result. If you are considering gastric bypass or have had it, join the community where we share our experiences and find support.

God knows I will probably have a million more questions about GB in the very near future :)
That's it. It sucks, but eventually it comes back. :)
One of my favorite products is Bumble and Bumble dry hairspray. It pumps up the volume.
https://www.drdkim.net/ask-the-dietitian/understanding-hair-loss-after-bariatric-surgery/
It is very noticeable , and gets me down, but I try to remember that the health benefits- (diabetes better, sleep apnea gone, and down 60+ lbs) FAR out-weigh the hair loss and saggy skin.
Hanging in there....