Our friends in the Nerd Patrol may remember a scene in Never Say Never Again where M (re-imagined as a health fetishist) tells Bond that he needs to eliminate free radicals. And Bond gets really excited until he discovers it's nutritional advice. "Free radicals," he is crushed to learn, refers not to the Brigati Rossi but to the chemicals which cause aging and cancer. Joke's on the brass, as usual. Turns out the best way to eliminate free radicals is with a martini.
Apparently, there is some little-understood synergy between the gin and vermouth (and possibly olives) which is especially effective at eliminating these free radicals. Honestly. And yes, shaken is better for you than stirred.