Garbage science, funded by Proctor & Gamble so they can sell snake oil to worried older people. Absolutely disgusting. These "scientists" should be ashamed of themselves.
> Conflict of interest > > ML and MY have received travel expenses and compensation following presentations at P&G.
A 3x improvement maybe not really be all that surprising. Smell is a pretty strong sense when you're young but it doe's fade when you get older, especially after the age of 60. It may be rewiring/re-energizing neural connections that are getting rusty (so to speak).
Should be pretty easy to test on one's self but you might have to be 60+ years old to get those results.
An obvious next step would be a controlled test to see what happens with those folks.
Seems to me it'd be worth a shot if you were close to someone dealing with that. I can't see how it could hurt.