In 2022 I was undergoing 5-day-per-week radiation treatment for squamous cell carcinoma (base of my tongue and right side of my neck). During this 7-week treatment, I also received two infusions of a "lite" version C-chemo infusion. At halfway through my (successful) treatment, my hemoglobin count had gone down to about 40% normal. A second chemo oncologist stepped in and agreed to stop the chemo portion of my treatments.
I'd been prescribed oral iron supplementation, but I made my own decision to go from the gluconate iron form to the polysaccharide form (much more absorbable iron in each pill). I also started taking both B12 and folic acid. Subsequent to my treatment, I experienced after-effects of the treatment itself. Fatigue was a big one, but there were four or five other ones, most of which persisted for five or six months, some longer.
Of course, I was getting tested every three months: fiber-optic throat scope, blood test, and CT scan. My blood test in the first couple of those test points was still showing anemia, though it had come up to about 77% & 85% of normal. Energy & stamina increased accordingly. By my third test point, my hemoglobin was in the low-normal range, and has continued to rise.
Now I find I only have the desire to nap during a day if I've over-exerted myself in the early part of the day, or if I don't have something engaging my interest & attention. But one thing that's interesting to me about the blood tests is that my doctor, finding the other blood scales to have been consistently in the normal range, is only interested in my hemoglobin count, my iron level, and my B12.
I still take the polysaccharide iron, but whereas I initially took it every other day, I now take it every 3-5 days. I make sure I get B12 daily, and folic acid supplement about once a week. Other than that, I eat a good diet and do take a general daily vitamin supplement.