The generalized name for sweet, short-chains of soluble carbohydrates. The world produced about 168 million tonnes of sugar in 2011. The average person consumes about 24 kilograms (53 lb) of sugar each year (33.1 kg in industrialised countries), equivalent to over 260 food calories per person, per day. New FDA nutrition facts labels recommend no more than 50g of added sugars per day. Potential negative health effects of excess sugar consumption include addiction, Alzheimer's disease, changes in blood glucose levels, cardiovascular disease, hyperactivity, obesity, diabetes, and tooth decay.