Sugar eaten in excess can cause an increase in the level of blood fats and can lead to obesity. Eating too much sugar can add excess calories to the diet, which contributes to weight gain, and decrease the number of other nutritious foods a person eats.
While many point to refined sugar as the culprit, other types of natural sugars are high in calories as well, and cutting back on all types of sugars can lead to an increase in health. Moderation is the most important factor regarding sugar. Women should eat no more than 6 teaspoons of sugar daily, while men should eat no more than 9 teaspoons daily.