Because sugar isn’t an essential nutrient, it doesn’t have an official recommendation. However, the American Heart Association set a recommended limit, so you don’t get too many extra calories in your diet. Men shouldn't have more than 9 teaspoons daily, while women shouldn't have more than 6 teaspoons. This amounts to a max of 37.5 grams of sugar or 150 calories from sugar for men, and 25 grams of sugar or 100 calories from sugar for women.