Women should limit sugar intake to no more than 6 teaspoons per day, which provides about 100 calories. Men should limit sugar intake to no more than 9 teaspoons, or about 150 calories.In contrast, the average adult consumes 22 teaspoons per day.omen should limit sugar intake to no more than 6 teaspoons per day, which provides about 100 calories. Men should limit sugar intake to no more than 9 teaspoons, or about 150 calories.