My right knee was injured playing softball. A very smart alternative health practitioner told me that all illness, ie staph, strep and any virus, etc goes to the injury area. She said if you want any injury area to heal, you need to give it added nutrition and support. Since I had some liquid Trace Minerals at home, I put a quarter size amount on my palm and rubbed it onto my knee. After doing this for two weeks my right knee felt stronger than my good left knee. Later playing racquetball, I injured my left knee - and the Trace Minerals came thru again! I now apply liquid Trace Minerals directly externally over my heart, liver, kidneys, pancreas and colon. Plus my knees! This is incredible!