In contrast, TG (RR: 1.02, 95% CI: 0.91–1.13, n = 12 studies, I2: 54.2%, p = 0.79, Figure 3), total cholesterol (TC) (RR: 0.98, 95% CI: 0.90–1.06, n = 14 studies, I2: 67.2%, p = 0.57, Figure 4), apolipoprotein A (ApoA1) (RR: 0.96, 95% CI: 0.70–1.30, n = 3 studies, I2: 83.5%, p = 0.78, Figure 5) and LDL–C (RR: 0.93, 95% CI: 0.79–1.09, n = 4 studies, I2: 0%, p = 0.38, Figure 6) were not associated with breast cancer development. Here, APOA1 is linked to breast cancer.