John Goodman: Good Genes or Good Docs?

John Goodman is quite the babe.

Here’s a 39-year-old version of the "Roseanne" star at back in 1991 (left) and 26 years later ... the slimmed-down actor -- who stars in "Kong: Skull Island" -- at a movie premiere in Hollywood earlier this week (right).

Good, man.

The question is ...