One thing worth factoring in, past a certain age for women, bone and muscle loss really starts kicking in. I'm 64 myself, running zepbound for several years at this point, and started running plus lifting at the gym specifically to push back against that, along with eating properly. So she might be sitting at a BMI that's technically low for her height, and usually once you're a bit older it helps to carry a few extra pounds as a buffer in case of a fall, especially if the bone and muscle side isn't being actively addressed. Might be worth focusing more on nutrition as the actual fix here. Also had some hair thinning myself on this medication, nothing too dramatic though, not worried about it.