In 2014, Guarente started a company called Elysium Health, which sells a dietary supplement containing a different precursor of NAD, known as NR, as well as a compound called pterostilbene, which is an activator of SIRT1.
Supplements containing pterostilbene are sold in many natural - foods stores and in stores specializing in dietary sSupplements containing pterostilbene are sold in many natural - foods stores and in stores specializing in dietary supplementssupplements.