Diet for breast cancer

@resort The type of cancer we seek to prevent from recurring may influence diet. I had HR+, HER2- BC and my oncologist told me to avoid foods with plant estrogen. I researched flax seed, tofu, beans, etc. and the recommendation is to avoid these because while these foods help prevent some cancers, they help stimulate recurrence of others, such as the BC I had. Consequently I stopped eating flax seed. I do feel somewhat stymied over the exhortations to eat healthy AND avoid certain healthy foods: what can I eat that helps more than hurts?

I'm not sure if anyone has mentioned this website:
https://foodforbreastcancer.com
It offers helpful information but I sometimes wonder about certain statements. In the section "Foods can reduce some aromatase inhibitor side effects" it states, "Women should not use copper bracelets or copper compression garments to relieve arthritis pain. Copper has been shown to contribute to angiogenesis and metastasis of breast cancer." But I have been unable to confirm that finding elsewhere and no sources are provided.

So now I'll need to ask my oncologist or PA about this copper claim since I have a pair of copper fit socks and I like them!