I'm about 50% sure this is actually an early-90s TV show, but part of me thinks it was a movie, so here goes:
So in this movie/miniseries/whateverthehellitwas, people figured out a fountain of youth. And it worked for most people. Those it didn't work for, they became these extremely strong cavemen-like people. I think they were called Recessives or something. Anyway, those strong-cavemen like people either trashed society, or the war to try and kill them trashed society.
One of the things I remember was that there was one couple in the movie/miniseries/whateverthehellitwas in which the woman was young and hot, while the man was old and feeble. See, they are both the same age, but the man never took the fountain of youth serum thing. I distinctly recall his old man saying "if I had taken that (garbled in memory), would I have become one of those things out there?"
There's also some genetic thing where every person in the society has to have a crystal implanted in them, which would change color and stay one color. people with the same color were allowed to date/have kids while others were not, to avoid some sort of Genetic Thing That I Can't Remember.
Also, there was some guy in it that was the product of a StrongCavemanGuy raping a normal woman, so he's half-StrongCavemanGuy. This guy, I distinctly remember, had a black crystal.
Hopefully someone can help me with this, its been floating around in my brain for a while now.