b4d1ced9_sity_of_Michigan_Health_System__Why
[Recommendation] Reduce your sugar [Why] 
Studies have shown that women who eat high amounts of sugar-containing foods have had an increased breast cancer risk, whether the association may be due to other dietary or lifestyle factors is unknown. Preliminary studies have reported associations between an increased intake of sugar or sugar-containing foods and an increased risk of breast cancer,116 though this link does not appear consistently in published research.117 Whether these associations exist because sugar directly promotes cancer or because sugar consumption is only a marker for some other dietary or lifestyle factor remains unknown.
Breast Cancer Prevention (Holistic) | University of Michigan Health System