A UCLA study published July 8 in iScience reports that creatine, the supplement widely used by athletes, boosted the energy and tumor-fighting activity of dendritic cells in mice, suggesting a possible role alongside cancer immunotherapy. The research team, led by professor Lili Yang, found that creatine acts like a rechargeable battery for these immune sentinels, helping them survive inside tumors and instruct killer T cells to attack.
What the Researchers Found
The team examined metabolic gene activity in dendritic cells that had infiltrated tumors in mice. They discovered that the gene encoding the creatine transporter, the protein that ferries creatine into cells, was significantly more active in tumor-infiltrating dendritic cells than in dendritic cells from healthy tissue.
When the researchers removed the creatine transporter, dendritic cells survived less effectively, became less active, and lost much of their ability to prime T cells against tumors. T cells grown alongside creatine-deficient dendritic cells multiplied less and produced fewer signaling molecules required for an anti-cancer response.
How Did Creatine Affect Tumors in Mice?
In mouse models of melanoma, daily creatine injections measurably slowed tumor growth and increased both the number and activity of dendritic cells inside the tumors. Treated dendritic cells released higher levels of chemical signals that attracted additional immune cells into the tumor environment.
Metabolomics analyses showed that creatine supplementation raised intracellular ATP levels in dendritic cells, supplying energy for the inflammatory signaling pathways required for cell activation. The authors compared creatine’s role to a rechargeable battery, allowing dendritic cells to store and release energy even while competing with rapidly growing tumor cells for limited nutrients.
What This Could Mean for Human Cell and Vaccine Research
Creatine also enhanced the activation of human monocyte-derived dendritic cells, which are commonly used to develop dendritic cell cancer vaccines, in laboratory experiments. The supplement improved those cells’ ability to stimulate human T cells against a cancer-associated target. The authors suggest that adding creatine during the production of dendritic cell vaccines could potentially make those therapies more effective.
Co-first author James Elsten-Brown noted that creatine could be considered as a supplement for patients already receiving immunotherapy and as a tool to improve the quality of dendritic cell-based vaccines before administration. The therapeutic strategy is the subject of a patent application filed by the UCLA Technology Development Group on behalf of the Regents of the University of California.
What Are the Limitations?
The researchers stressed that all experiments were conducted in mice and in human cells grown in the laboratory. None of the work has been tested in cancer patients, and the approaches have not been approved by the Food and Drug Administration as safe and effective for use in people.
Creatine monohydrate has been used for decades and is generally considered safe at recommended doses, but anyone undergoing cancer treatment is advised to consult a physician before adding any supplement to their routine. The next planned step is prospective clinical trials to determine whether creatine supplementation can improve outcomes for patients receiving cancer immunotherapy.
Background on Creatine
Prior research has documented creatine’s role in cellular energy metabolism. Frank Murray’s 100 Super Supplements for a Longer Life notes that creatine ingestion increases intramuscular creatine and phosphocreatine concentrations. Other authors have explored broader applications: Ralph W. Moss discussed creatine hydrate’s role in distributing urea in cancer treatment in Cancer Therapy: The Independent Consumer’s Guide to Non-Toxic Treatment and Prevention, while Allen C. Bowling noted in Complementary and Alternative Medicine and Multiple Sclerosis that creatine may have a protective effect on nerves.
Researchers have also reported that creatine may help calm inflammatory processes in the gut and support immune function beyond muscle physiology, suggesting that the supplement’s biological reach extends well beyond its original athletic use.
Source: Yang et al., iScience, University of California, Los Angeles (published July 8, 2026). These statements have not been evaluated by the Food and Drug Administration. Creatine and other products sold by SaltyFuelShop are not intended to diagnose, treat, cure, or prevent any disease. Anyone undergoing medical treatment should consult a physician before adding a supplement.
