Have before countless other magnesium products from drug stores and even tried dietary supplements shops and none of it had me are of my calf cramps may exempt the Tranings (martial arts, gym and jogging) .... until I push on this Prodkt. Silk had months no more cramps and even my sleep has improved, which means that I'm fitter daytime. The concentration during the exam preparation for Uni has been slightly improved. I must say that I'm not really the type to comment on everything, but in this case I feel obliged. No more cheap magnesium !!! After more than 3 months I order me now the 500g bag (taking even under Suggested) Conclusion: If you want to have good magnesium should, in my opinion, come back to this product !!!
