Tell us what this radioactive creme was used for

Hint:

Cracked by: Rosh, Amarendra Kumar, KK, badideabear, Amit, Rogi, Thejas V R, raklodramA, Anonymous, Rahul Rajeev, Dibyo, sandeep bhat, Aditya S, username, Girish, Manish Achuth, jowens, Jayaprakash B R, thirudgr8, shrik, Ananth, Siddarth Pai, Rahulk, vishwanath, Bharath, Sumanth Patlolla, mankuTimma and Shwetha Maiya