There is no way for us to know what intake is due to the amount of variables associated with topical application. Factor include:
- area of application
- amount of time the application is left on the skin
- frequency of application
- varying the location of application
- temperature of the area of application
- hydration of skin
The best approximate calculation would can give is a yield of .236 ml of magnesium with approximately 50+ applications – for the PROcure Epsom Salt Rub 6oz tube.