Recommendations that may assist in preventing breast cancer include:

• maintaining a healthy weight
• avoiding or limiting alcohol intake to no more than 10 standard drinks a week and no more than four standard drinks on any one day
• getting 30 minutes or more of moderate-intensity (puffing) exercise most days (150–300 minutes per week)
• avoiding or limiting hormone replacement therapy use
• additional prevention strategies in people with increased risk (e.g. gene mutation carriers).

Additional prevention interventions are considered for women at increased risk, including those at moderately increased risk. For example, those at moderately increased risk (1.5–3 times the population risk) may be offered medication to reduce risk, and those at high risk (more than three times the population risk) may be offered medication or risk-reducing surgery.