This video is all about how taking cold showers can stimulate better immune function.

☞ Immunometabolism
https://www.ncbi.nlm.nih.gov/pmc/arti...

This is a really interesting area of research, especially in light of America's obesity epidemic, so I highly encourage you look into this and I might even put out a video on it some time soon because it just has so many implications on our understanding of health and wellness.