Magnesium Oil Spray. Recommended by a friend, she sprayed my neck and shoulders and I screamed in pain as it stung. She said that was evidence of a manesium deficiency. The pain definately reduced (spraying and muscle pain) much quicker than anything I had tried before… 24 hour improvement. I used to suffer neck and shoulder tension pain regularly. Now I spray morning and night under my arms and its a fabulous deodorant and anti-perspirant too.