Systematic Review And Meta-Analysis Suggest That Dietary Cholesterol Intake Increases Risk Of Breast Cancer, Nutrition Research, July 2016
Overall, 9 articles involving 6 cohort studies and 3 case-control studies were included in this study. The pooled relative risk with 95% confidence intervals of breast cancer for the highest vs lowest category of dietary cholesterol intake was 1.29 (1.06-1.56). Results from this meta-analysis indicated that dietary cholesterol was associated with an increased risk of breast cancer.
Those who consumed the most cholesterol had a 29% increased risk for breast cancer compared to those who consumed the least.
Only animal food contains cholesterol. (from Wikipedia):