Why is Kendal Mint Cake so popular?

Romney's Kendal Mint Cake has a reputation as a restorative and energy provider among the world's leading mountain climbers. Visitors who walk or climb in the Lake District take it readily. Energy is produced when the sugar and glucose gets into the bloodstream. A letter from the Nepal Himalayan Expedition stated, "The Kendal Mint Cake when eaten seemed to be converted into energy almost immediately and we were able to undergo very strenuous activity for long periods without any further nutrition. It was an essential part of our diet. I know of no other food that would satisfy the exacting and difficult requirements of high altitude climbing so well."

It is preferred over chocolate and other sugar based rations as it does not create thirst and is generally considered a refreshing confectionery treat.