Figure 2.

The heatmap illustrates the causal relationships between various dietary intakes and five common cancers determined by the IVW method. The 45 dietary habits and five cancers are categorized respectively. Dietary categories include cereal, bread, fruit and vegetables, meat and fish, dairy products, drinks, and salt. The cancer types comprise breast cancer, endometrial cancer, lung cancer, ovarian cancer, and prostate cancer. The greater the significance (P-value < 0.05), the deeper the color, with blue indicating protective factors and red risk factors.