Gwyneth Paltrow: Good Genes or Good Docs?!

Gwyneth Paltrow's beauty is full of "Glee."

Here’s a 20-year-old version of the fresh-faced actress posing for a "Cruel Doubt" promo picture back in 1992 (left) and 24 years later ... the award-winning actress -- who celebrated her 44th birthday earlier this week -- at a benefit in New York City last month (right).

Goop.

The question is ...