A Common Gym Supplement May Give Cancer-Fighting Cells an Energy Boost - ScienceAlert

What the report says

ScienceAlert reported on July 25, 2026, that a new study in iScience suggests creatine, widely known as a gym supplement and also produced by the body, may help energize immune cells involved in anti-cancer responses. The research, led by a University of California, Los Angeles team, builds on earlier work indicating that creatine can support killer T cells, which attack cancer cells directly.

According to the report, the latest study focused on dendritic cells, which help identify tumor material and activate T cells. In mouse tumors, researchers found that genes linked to nutrient handling were active in dendritic cells, including a creatine transporter that appeared more active in tumor-associated dendritic cells than in those from healthy tissue. Lab-grown dendritic cells lacking that transporter died sooner and were less effective at training T cells.

The team also tested creatine supplementation in mouse models of melanoma. ScienceAlert reported that this slowed tumor growth and increased dendritic cell numbers and activity. The findings point to a possible role for creatine in strengthening the broader immune network that current cancer immunotherapies rely on, not only the T cells that carry out the attack.

The evidence remains early: the article notes that the work so far comes from mouse models and human cells grown in the laboratory, not from clinical trials in patients. Researchers said future trials would be needed to test creatine alongside immunotherapy. ScienceAlert also emphasized that cancer patients should not start creatine or any treatment regimen without medical advice, even though creatine is widely available and generally considered safe at recommended doses for many users.