yeah, I have no proof and have done no research, but my guess is that in the earlier photos he is a chef, and in the latter photos he is a celebrity chef.

Chefs work long hours and late nights in an extremely stressful job. They are renouned for their habits of heavy drinking and chain smoking. Stress, poor sleep, drinking, and smoking, all contribute to premature aging.

But celebrity chefs must look good. This isn't to say their job isnt stressful - but there is an additional pressure put on them to look good for the camera, because while your mom might love you no matter what, people watching tv mostly wanna look at pretty people. Enter: professional skin care routines, botox, personal chefs, personal lifestyle coaches, professional hair stylists, personal assistants, style consultants, and hair and makeup anytime you go out in public. Any celebrity who still gives a shit about their career and public image has a small army of people dedicated to keeping them looking as young and hot as possible for as long as possible.

Hence the apparent reverse aging effect. A combination of having a low starting point, and then making significant improvements in both health and aesthetics.