http://blogs.scientificamerican.com/guest-blog/beyond-resveratrol-the-anti-aging-nad-fad/Recent research suggests it may be possible to reverse mitochondrial decay with dietary supplements that increase cellular levels of a molecule called NAD (nicotinamide adenine dinucleotide). But caution is due: While there's promising test-tube data and animal research regarding NAD boosters, no human clinical results on them have been published.