Gym Supplement Shows Promise for Depression Treatment

Scientists are exploring whether a supplement already sitting in millions of gym bags could help improve depression symptoms.

A new review of five clinical trials suggests creatine monohydrate, the popular workout supplement, might offer benefits for people with depression when added to existing treatments. The findings, published in Brain Medicine, show mixed but promising results.

Researchers from the University of Ottawa analyzed studies involving people with major depression and bipolar disorder. In one trial, women taking 5 grams of creatine daily alongside the antidepressant escitalopram showed greater improvement after eight weeks. Another study found benefits when creatine was combined with cognitive behavioral therapy.

However, not all results were positive. Studies involving teenage girls found no benefits from various creatine doses after eight weeks. A bipolar depression trial also showed no significant improvements when creatine was added to medication.

Lead researcher Bassam Jeryous Fares called the signal "interesting, but not a verdict." Two trials pointed one direction and three pointed another, he explained. That's not enough evidence to change how doctors treat depression today, but it's enough to keep investigating.

The science behind the potential connection makes sense. People with mood disorders appear to process creatine differently in their brains. Since creatine helps produce energy, disruptions in this process might contribute to depression. The supplement may also boost dopamine and serotonin, the same brain chemicals targeted by most antidepressants.

The Bright Side

Dr. Thea Gallagher, a psychologist at NYU Langone, says this research is encouraging because it identifies another potential tool for fighting depression. What makes creatine particularly exciting is that it's relatively inexpensive and widely available.

The supplement appears safe for most people, with side effects limited to mild stomach pain in studies. Still, experts emphasize talking with a healthcare provider before starting any supplement, especially for people with kidney disease or who are pregnant.

Researchers stress that creatine should complement existing treatments, not replace them. It's not a substitute for therapy, antidepressant medication, regular exercise, or healthy sleep habits.

The team acknowledges their study reviewed existing research rather than conducting new trials, and larger studies are still needed. They also note that depression is complex, so scientists don't yet know which patients might benefit most or what the optimal approach looks like.

For now, creatine joins a growing list of potential pathways for supporting mental health beyond traditional approaches. The possibility that something so accessible could help even a subset of people struggling with depression offers a glimmer of hope worth pursuing.