Shower filters should be used to remove chlorine and heavy metals from shower water.

“I definitely would avoid taking a shower in water that has chlorine and fluoride in it and other potential contaminants. So, if you're in a place in the world where your water is not that clean, which is most municipalities in the United States, anywhere in the US, put a shower filter on it that's going to get rid of at least some of the chlorine, some of the heavy metals, and some of the other things in the in the shower water that you could absorb through your skin while you're showering.”