We can question the validity of the science, if you'd like, by analyzing the experiments and judging if the conclusion reached by the scientists is actually supported by their data. But if we accept that the scientific study is sound and that there is a biological basis behind it (i.e., that melanin is a contributing factor), then it's not a stereotype. Science doesn't care about your opinions.That is only one person's opinion. No offense to cachoo but she doesn't make the official call. I think this thread is based on a stereotype. Of course not all black people age well even if many do and even if melanin helps.
Obviously, not all black people age well, but I think it could be fair to say that a greater % of black people, relative to white people, age well.