Administration of Olive oil + C60 buckminsterfullerene to rats doubled lifespan.
The control rats 50% survival was to ~32 months, C60 treated rats 50% survival was to 64 months. (page 6 of the linked study)
Of interest is that the C60+ Olive oil was only administered from months 10-17.
"The prolongation of the lifespan of rats by repeated oral administration of 
fullerene Tarek Baati a,b, Fanchon Bourasset c, Najla Gharbi d, Leila Njim b, Manef Abderrabba e, Abdelhamid Kerkeni b, Henri Szwarc d, Fathi Moussa d,*"
Jeanne Calment was known to eat 2 lbs of chocolate (antioxidant) a week and dump olive oil on everything she ate -- lived to 122.
The Singularity approaches