Sugars have relatively no nutritional value. These extra calories are stored in body fats for future use. So sugar can cause obesity. Another major catastrophe caused by the excessive intake of sugar is tooth decay. This is why one's dentist always recommends to cut back on the sweets.
Sugar can cause tooth decay faster than any other food source.
This is because sugars are classified as a type of carbohydrate. Any type of carbohydrate can cause tooth decay, but since sugars are so naturally sticky, they keep in contact with the tooth much longer than other foods. If the sugar is not removed from the tooth surface soon after the sugar is consumed, the bacteria in the mouth will start to break down the sugars. It is the byproduct of this natural digestion of sugars that causes the tooth decay. It will slowly eat its way past the tooth enamel and get into the tooth itself, causing cavities.