[G Larry]

The study says "reverses the aging process" it does NOT say "stops the aging process" which could be understood as being temporary.

Reversal is NOT temporary.

[Rockingham]

The reversal is as to two microbiological markers of aging, not in any other aspects. There is no proof of better health, appearance, or longer lifespan.

[Boogieman]

Well, it reverses a specific part of the aging process, because the telomeres start growing again instead of shrinking. I think they just don’t continue growing once you stop the treatments.

I think it’s just sloppy writing on the part of the author to say that this reversal is the same as reversing the whole aging process. Obviously people are not turning into Benjamin Buttons just by sucking on more oxygen.