I take a transdermal magnesium. Ie that I mix this with water, on behalf of the skin and then let soak in for 40 minutes. The mixing ratio I after repeated attempts for me to 500ml - set> 1 tbsp. When the body has open positions (small scratch etc.) you can feel here a burning sensation similar to that of common salt. The effect is to me a high physical freshness by the magnesium, I sleep definitely a better and through. I will continue to test the magnesium, provided that negative experiences occur or side effects, I will tell it here. Stand now after 2 weeks as described above optimal. Therefore, full 5 stars. Perfect for the price!