Seventeen cohort studies were included in the meta-analysis based on the PubMed database. The authors observed a dose-response effect. The RRs were calculated as follows:
- 0.93 per 400 g total dairy products/d
- 0.98 per 200 g high-fat dairy products/d
- 0.91 per 200 g low-fat dairy products/d
- 0.87 (0.72, 1.04; I2 = 94%) per 200 g milk/d
- 0.92 (0.86, 0.99; I2 = 0%) per 50 g cheese/d
The impact of yogurt is even stronger with an RR of 0.78 per 200 g yogurt/d. Nonlinear inverse associations were observed for all categories of dairy products, but there was a flattening of the curve at higher intakes.