I too am calling bullshit, although for different reasons. Take a look at Figure 3A. Is there really that big of a difference between THC and CBD treated vs. not treated images? To me, a seeing person with eyes, no.
They didn't claim that there was a statistical difference in 3A. It's with senescent cells at the 48 hour time-point when combined with hydrogen peroxide, that they saw the biggest difference. (3C, on the right)