but, it also sez the following : "They also demonstrated that the compound is fully absorbed via the GI tract and totally eliminated from the body in 10 hours." so, not sure what causes the increase in life-span. although, the cryptic "attenuation of age-associated increases in oxidative stress" does hint at something, probably the effect that this combo causes as it is moving through the GI tract ?
This is not, it's simply a bit vague. If it attenuates age-associated increases in oxidative stress then it probably has an anti-oxidant effect. Alternatively, it affects the systems responsible age-related oxidation - in other words, an indirect anti-oxidant action.