The legendary British climber George Mallory said that in his 1923 attempt on Mount Everest, he succeeded in making it within two thousand feet of the summit by living on sugar for the last few days of the ascent: almost exclusively lemon drops, peppermint candies, and chocolate. “At great elevations no one has any strength to waste on unnecessary processes of digestion,” Mallory said; “sugar…can be digested quickly and easily converted into muscular energy. It has also a much-needed stimulating effect.