Absolutely! The correlation is strong in my case, though, I was on alert waiting to get cold for quite some time at first, and I also didn't change anything else in my routines at the time, so I attributed the results to cold showers. I must say that I didn't notice other benefits that people expect from the practice: no weight loss, no boost in testosterone, etc.

Did your hair get shinier?

Being a man I'm afraid I forgot to check that. It does take me longer to clean off shampoo, so in theory that might make them shinier.