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Digestive biscuits

Is a semi-sweet biscuit that originated in Scotland, and is popular worldwide. The digestive was first developed in 1839 by two Scottish doctors to aid digestion at a place called Logie Steading in Forres. 

The term "digestive" is derived from the belief that they had antacid properties due to the use of sodium bicarbonate when they were first developed. Historically, some producers used diastatic malt extract to "digest" some of the starch that existed in flour prior to baking. (src)

Digestive biscuits aren't without their benefits, they just have nothing to do with healthful eating. Were touted as a digestive aid from their inception, likely because they contained a large amount of baking soda. (src)