where does the name digestive biscuit come from
McVitie's McVitie & Price's first major biscuit was the McVitie's Digestive, created in 1892 by a new young employee at the company named Alexander Grant.[7] The biscuit was given its name because it was thought that its high baking soda content served as an aid to food digestion.[7] Grant was later to become managing director of the company, in 1923 he was the main benefactor in the establishing the National Library of Scotland giving an endowment of £100,000. Grant donated a further £100,000 in 1928 to assist with the building of the National Library premises on George IV Bridge in Edinburgh.[8]
William Beaumont By August 1825, Beaumont had been relocated to Fort Niagara in New York, and Alexis St. Martin had come with him. Beaumont recognized that he had in St. Martin an unusual opportunity to observe digestive processes. Dr. Beaumont began to perform experiments on digestion using the stomach of St. Martin. Most of the experiments were conducted by tying a piece of food to a string and inserting it through the hole into St. Martin's stomach. Every few hours, Beaumont would remove the food and observe how well it had been digested. Beaumont also extracted a sample of gastric acid from St. Martin's stomach for analysis. In September, Alexis St. Martin ran away from Dr. Beaumont and moved to Canada, leaving Beaumont to concentrate on his duties as an army surgeon but Dr. Beaumont had him caught to continue to exhibit him. Beaumont also used samples of stomach acid taken out of St. Martin to "digest" bits of food in cups. This led to the important discovery that the stomach acid, and not solely the mashing, pounding and squeezing of the stomach, digests the food into nutrients the stomach can use; in other words, digestion was primarily a chemical process and not a mechanical one.[8]