There is evidence it increases the lifespan of test animals by 10%.
ScienceDaily (Mar. 8, 2011) — Scientists are reporting the first evidence that consumption of a healthful antioxidant substance in apples extends the average lifespan of test animals, and does so by 10 percent. The new results, obtained with fruit flies -- stand-ins for humans in hundreds of research projects each year -- bolster similar findings on apple antioxidants in other animal tests.
The study appears in ACS's Journal of Agricultural and Food Chemistry.