Supplements that can be beneficial in preventing Breast cancer via modifying estrogen metabolism.

DIM di Indole methane found in garlic and onions

Resveratrol

Alfa lipoic acid ALA

NAC n acetyl cysteine

Iodine

Cruciferous vegetables

Flax seed meal lignans

Folic acid,B6, B12

Milk and meat both have estrogens so reduce consumption.

Soy (not fractionated)

Kudzu