A common workout supplement might be a secret weapon for cancer immunotherapy

The study linked in the post found that creatine helps certain immune cells work more effectively in tumors, which lets cancer-fighting T-cells stick around longer and do their job better. Other research backs this up, showing creatine improves how immune cells power themselves in the tumor environment. But here’s the twist—another study found that too much creatine in tumors might actually help the wrong kind of immune cells take over, weakening the body’s response. So while creatine looks promising in some cases, it might backfire in others, and we don’t yet know who it helps or hurts.