May I offer a few little tips, a few things that I did while having two surgeries, 16 rounds of chemo, 30 rounds of radiology. Magnesium & bark, turmeric, hair/nails/skin, probiotic ... all purchased...
I went on a simple multivitamin and my white hair regrowth suddenly got colour again and my nails stops breaking. My diet was already hood but I think we are quite depleted following treatment.