I put salt in my (filtered) water every time I drink, which is several times a day. Much of our pain comes from either inflammation from anti-nutrients (usually plant defense chemicals), or mineral deficiencies. Celtic sea salt, Himalayan salt, etc. are good sources to counteract such deficiencies.
Discussion
Yes, I'm a fan of adding pinches of Celtic salt to my RO water as well. Especially in the morning, half an hour before I usually have my first coffee.