ON Serious Mass is the ultimate in weight gain formulas. With approximately 1,240 calories per serving and 50 grams of protein for muscle recovery support, this instantized powder makes the ideal post-workout and between meals shake for sizing up your goals. Serious Mass provides you with the tools (250gm Carbs) you need to pack on the kilograms and help you develop the physique you’ve always wanted. To instantly check the authenticity of your ON product, SMS us your 6 digit unique code (on the pack) at 57575 or visit our website AUTHENTICATEON.in. ON Serious Mass 3 LBs pack is formulated & designed in the US. Now as part of the Make In India initiative, it is manufactured in India in a facility that is ISO 14001 & 22000 certified and Inspected & Approved by Food Safety Standard Authority of India. Whey Imported from US.