https://www.midwesterndoctor.com/p/what-water-should-you-drink?

From The Forgotten Side of Medicine substack. Quite detailed but dive in and immerse yourself. See the bit on Aluminum!

Excerpt:

“one of the most important but least appreciated water filtration needs is for showers. This is because once water is heated, chlorine will off gas from water, which results in people frequently breathing it significant amounts of it in while showering. In turn, I and many others have found a subset of patients (e.g., singers or those with a sensitive throat) find certain chronic symptoms improve once they get a chlorine shower filter, and likewise that it feels much better for the skin and hair if they use a dechlorinated shower.”

And…

“Our bodies are quite sensitive to lowered magnesium levels (e.g., this can cause heart arrhythmias or muscle pain).
•We often depend upon water for our daily magnesium intake
•Many foods are now magnesium deficient (due to modern agricultural practices having demineralized the soil and the herbicide Roundup binding many of the essential minerals that remain in the soil), and as a result widespread magnesium deficiencies already exist. For these reasons, I often advise people who plan to drink RO water for a prolonged period to also take a magnesium supplement (preferably magnesium threonate, malate, orotate or citrate—magnesium oxide is not good).