GMP (good manufacturing practice)-certified supplements follow strict rules set by the FDA to ensure they're safe and reliable. These rules cover everything from cleanliness to how they're made and tested. By sticking to these rules, manufacturers guarantee that their supplements are safe, potent, and accurately labelled. When you see a GMP certification, you can trust that the supplement meets high quality standards, giving you confidence in what you're buying. Decode Age supplements are GMP certified.