b4d1ced9_sity_of_Michigan_Health_System__Why
[Recommendation] Cut down on alcohol [Why] 
Limit your intake to lower your risk: Studies show that women who drink alcohol have a higher breast cancer risk than those who abstain. An analysis of studies using the best available methodology found that women who drink alcohol have a higher risk of breast cancer compared with teetotalers.109 Alcohol consumption during early adulthood may be more of a risk factor than alcohol consumption at a later age.110 Some,111 , 112 though not all,113 studies have reported that alcohol increases estrogen levels. Increased estrogen levels might explain the increase in risk. In a preliminary report, drinkers with low intake of folic acid had a 32% increased risk of breast cancer compared with nondrinkers; however, the excess risk was only 5% in those drinkers who consumed adequate levels of folic acid.114 In the same report, women taking multivitamins containing folic acid and having at least 1.5 drinks per day had a 26% lower risk of being diagnosed with breast cancer compared with women drinking the same amount of alcohol but not taking folic acid-containing vitamins.115
Breast Cancer Prevention (Holistic) | University of Michigan Health System