Created by the breakdown of starch. Also happens in seeds or other plants as they begin to sprout.
Effects on health are not well studied but likely less harmful than other simple sugars like fructose or table sugar containing fructose. Overconsumption of maltose has a direct correspondence to obesity and related diseases and can also cause GI issues like bloating, gas, and diarrhea. Excessive added sugar intake is associated with adverse health conditions, including obesity, metabolic syndrome, and inflammatory diseases. Excessive sugar consumption may trigger neuroadaptations in the brain that decouple eating behavior from caloric needs and leads to compulsive overeating. The American Heart Association suggests an added-sugar limit of no more than 24 grams of sugar for most women and no more than 36 grams of sugar for most men each day.
Impact of sugar on the body, brain, and behaviorhttps://pubmed.ncbi.nlm.nih.gov/29772560/
Added sugars drive coronary heart disease via insulin resistance and hyperinsulinaemia: a new paradigmhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5708308/
Added Sugar in the Diethttps://www.hsph.harvard.edu/nutritionsource/carbohydrates/added-sugar-in-the-diet/#:~:text=The%20AHA%20suggests%20an%20added,of%20sugar)%20for%20most%20men.
Sugar-Sweetened Beverages and Cardiometabolic Health: An Update of the Evidencehttps://pubmed.ncbi.nlm.nih.gov/31398911/