RAD 140 is a supplement that helps people who struggle with working out and gaining muscle mass. It works by improving testosterone regulation in the body, elevating energy levels, and boosting metabolism for better absorption of nutrients. According to the supplement's manufacturing company, it contains different natural ingredients, all of which are individually known to provide several benefits to health. They are also highly potent, which is why most users get results within weeks of adding them to their routines. However, do you even need a supplement for muscle building?