New research, however, suggests that low-fat dairy may benefit mental health, too.
Prof. Nagatomi and colleagues note that previous studies have associated dairy intake with depression, though whether the effect is positive or negative has been inconclusive.
For their study, the researchers set out to investigate how the consumption of certain low-fat and high-fat dairy products individually impact the risk of developing symptoms of depression.
Participants disclosed how often they consumed low-fat and whole-fat milk and yogurt in a dietary questionnaire. The intake of cheese, butter, and other dairy products was not reported.
Symptoms of depression were assessed using the 20-item self-rating depression scale.
The team identified depressive symptoms among 31.2 percent of men and 31.7 percent of women.