Magnesium Gel is for use at the end of the day to promote a sense of relaxation and wellbeing through massage. Apply before bedtime to the neck and shoulder area, lower back, legs or even the bottoms of your feet. 30% Concentration 1 ml of Magnesium Gel is approx. 100 mg of pure magnesium. Apply Só Magnesium Gel and gently massage into skin. Allow to dry completely before contact with any fabrics. May leave a salty residue and can be rinsed off after 20 mins. *Avoid direct contact with eyes, mucous membranes, open wounds, broken skin, and other sensitive areas such as your face. If redness or irritation occurs, rinse with cool water. Slight itching/warming is normal and will dissipate in 10-15 mins.