Women are more likely to pare down calories at mealtime if they’re in the company of men at the dining table, a new study suggests.

Researchers at McMaster University in Hamilton observed 469 people sitting down at tables either alone or with others during one week at three cafeterias.

The findings, which appear in the online version of Appetite, found that women who ate with a man chose food with significantly fewer calories than those observed when dining with another woman.

When it came to people eating in pairs, when women ate with other women they averaged about 670 calories. The average dipped to 550 calories when the woman’s dining companion was male.