Hi Rabbit,
I’ve had cancer cachexia. I went from 250 or so to less than 130lbs in less than a month. I had TPF induction chemo, and that put me in the hospital and nursing home for 6 months. Probably from the weight loss I could not walk for a year. It’s right you loose fat, but skeletal muscle too.
I can laugh now, but one day in the hospital I woke up, and couldn’t find my legs (from the waist down I had no movement) and patted the blanket. I figured they needed to take my legs, only to find I had snuck in the bed mattress!
I was still underweight from my initial weight. I read up on cachexia, and part of is not due to the lack of eating, it’s a metabolic metabolism effect from the tumor. To help reverse this effect, I took certain vitamins, protein drinks a prescription drug called Marinol, and anabolic steroids through a doctors prescription, and weight training. It takes time, and eventually I went up to 200lbs, but my kidney doctor told me not to gain more weight because it’s effecting my kidney.
I had a few more recurrences, 6, and was up and down with my weight. Currently, 10 years after diagnosis, i’m 180, but was in better shape a few years ago goibg o the gym and watching my diet, but slacked off due to other issues.
Here’s one link about Cachexia. You may not have cachexia, but I read it can effect up to 20 percent of cancer patients.,
https://www.verywellhealth.com/understanding-cachexia-symptoms-causes-and-treatments-2249008It goes with saying, discuss any concerns with your doctor(s) too!