A therapeutic low dosage would still be considerably higher compared to the levels that has been suggested to add in drinking water. Normal therapeutic dosage

A therapeutic low dosage would still be considerably higher compared to the levels that has been suggested to add in drinking water. Normal therapeutic dosage is around 300mg and 500mg lithium per day, and blood levels should be around 0,5-1,2 mEq/L. A concentration at 0,7 mEq/L as quoted in the article is within normal values and dosage, and not really considered low. The real dangers is NSAIDS or ACE inhibitors which can push your concentration up quite rapidly, but that's easy to avoid, and still not very relevant until you're at around 1,0 mEq/L, give or take. Concentration above 1,6 mEq/L is considered an overdosage and comes with a lot of risks, thyroid being one of them. Anyone put on a therapeutic dosages of lithium will have their blood checked frequently, often starting with twice a week for an extended period. But again - in dosages that are 100-1000x times higher than that they want to add in the drinking water.