Posted 8/6/2014 1:42 AM (GMT 0)
Do you mean hard on the kidneys or not hard on the kidneys?
I don't know about magnesium, but detox means detox, so it should be helping your kidneys, not hurting them (i.e. removing impurities and toxins).
If you're really worried about magnesium, just use sea salt, and you will be fine. Hydrogen peroxide shouldn't be a problem, but you can use food-grade hydrogen peroxide.
Make sure you add ginger tea to the bath water.
Margaret