 So they're strong and ready for action. Now, here's the key. This is so important for those of us, say, in our 50s, 60s, 70s. You see, we had lots and lots of creatine when we were young. We had oodles of this stuff. It was coming out of our ears. We had lots of creatine. Our bodies made a lot of it. But as we get older, like everything else, we don't do that as well. So we have less creatine in our muscles.