Yes, reverse osmosis does remove calcium and magnesium. Like, really well. In fact, it strips out about 90% to 99% of these minerals, along with a whole party of other stuff like lead and chlorine.
But don’t panic! This isn’t a bad thing—it’s actually the whole of the process. Imagine you’re a bouncer at a VIP club, and only pure H₂O molecules get past the velvet rope. Calcium and magnesium? Sorry, they’re staying outside.
Why Does This Even Matter to You?
Here’s the fun part: those minerals are the reason your showerhead looks like a tiny limestone cave. Hard water—heavy in calcium and magnesium—leaves white, crusty deposits on your favorite coffee mug and makes soap refuse to lather properly.
By removing them, RO water actually makes your soaps and shampoos foam like crazy. Plus, your pipes won’t get clogged with that annoying scale. So, you’re not losing “good stuff”—you’re giving your plumbing a spa day.
