I honestly have no idea. The marketing material suggests old people show health improvements. I'm no expert but so far it seems officially it doesn't do anything but looks promising.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3021100/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC385349/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3383356/