I’m sure your visual analysis performed via a screen is more accurate than the dozens of tests he constantly has carried out by specialists in a lab.

Just to keep the sarcasm going: Is there a scientific test that checks for "looking like a vampire"?. Cause he sure does to me, but I'm not a vampire-specialist, so what do I know...

Umm isn't that the point of trying to reverse aging ..to look normally youthful not look so unusual that the look isn't youthful at all just unusual. Look at all the comments here that agree some saying the look is that of a vampire. Thats what the majority thinks and wishes for when it comes to reverse aging ..to be and look 20 again yet with all the wisdom and wealth gained over the years.

Are those test results compared to average and "unhealthy" people, and/or his own baseline tracked over a few years before he started this thing?

And tons of makeup it is TV after all.

Do we have evidence that looking healthy and being healthy are correlated?

Depends how you define those terms, but i think the answer is an obvious yes.

Many looking healthy things are literally just your body functioning correctly.

The thing is that what "looks" healthy is culture-dependent; nowadays in the caucasian west, looking lean and tanned is considered a healthy / attractive look, but in other places, times and subcultures having more weight or pale skin is considered healthy (or attractive).

That doesn't prevent it from correlate. If obesity is the bigger threat than looking skinny is correlated with being healthy. If food scarcity is a bigger threat than the opposite.

However a lot of more subtle things like soft, shiny hair or good skin are correlated with nutrition.

I think he looks old and young at the same time. It's obvious he is not 20 years of age. But he doesn't look like 44 either. It's almost like he looks much younger than his age giving him this unnatural look.

Since very few people are measured and as fit as he is, it's not strange that we think he looks strange. But mostly I think it's lightning and makeup giving him this unnatural look.

He uses similar lighting in his YouTube videos just not as much.

Was thinking like maybe he has cancer or something cause he doesn't look healthy ..maybe the truth is is that his diet really is about keeping him alive & trying to find a cure for what he has naturally.

This is only a thought and an opinion based on how I think he looks which looks not healthy to me, but again only an opinion. Time will tell!