What wets your whistle? A cold beer? A slushy margarita? A glass of red wine? At a party, a happy hour or a night by the fireplace, a drink is such a natural accompaniment that sometimes we forget about the calories we’re consuming. Big mistake: Calories from alcohol add up quickly. Our bodies don’t register liquids in terms of fullness,” says Elizabeth Somer, R.D., a nutritionist and author of The Origin Diet (Henry Holt, 2001). “The reason you gain weight from alcohol is that you don’t compensate by eating less later. You still eat the same amount, regardless of whether you had the drink.”

Remember this too: Even though the screwdriver you order at brunch has vodka and orange juice, mixed drinks provide little to no nutritional value - only calories. “Alcohol is not an essential nutrient,” says Somer. “It has a diuretic effect on the body. Even if you mix it with orange or cranberry juice, you are more likely to flush the nutrients out of your system.”

- Amy Goldhammer, Cristina Markarian