Malt extract
From Wikipedia:
Malt extract, also known as extract of malt, is a sweet, treacly substance used as a dietary supplement. It was popular in the first half of the twentieth century as a nutritional enhancer for the children of the British urban working class, whose diet was often deficient in vitamins and minerals. Children were given cod liver oil for the same reason but it proved so unpalatable that it was combined with extract of malt to produce "Malt and Cod-Liver Oil." Malt extract was given as a "strengthening medicine" by Kanga to Roo in The House at Pooh Corner, and was also Tigger's favorite food in the book.
The 1907 British Pharmaceutical Codex's instructions for making nutritional extract of malt do not include a mashout at the end of extraction, and include the use of lower mash temperatures than is typical with modern beer brewing practices. The Codex indicates that diastatic activity is to be preserved by the use of temperatures not exceeding 55°C (131°F).