Key points from article :
Keio University running a human trial orally administered nicotinamide mononucleotide (NMN).
NMN indirectly activates sirtuins which is known to inhibit aging.
In previous mice trials muscles have been rejuvenated from the equivalent of 60 year old to 20 year old.
Life expectancy of mice increased and gap with healthy life expectancy reduced.
Difference between average life expectancy and healthy life expectancy is about 10 years in Japan.
NMN is found in animals and plants but it would be difficult for humans to get enough in their diet to make a difference.