Claim: A new study found that creatine, the same supplement bodybuilders use to build muscle, provides a crucial energy boost to key immune cells that attack and slow cancer tumor growth.

The claim that creatine provides a crucial energy boost to immune cells involved in cancer defense is mostly true. Research from UCLA indicates that creatine enhances the energy levels of immune cells, specifically dendritic cells, which are vital in combating tumors. This finding is supported by multiple studies published in reputable sources. However, the evidence is primarily based on animal models, which may not fully translate to human outcomes. Thus, while the initial findings are promising, further research is necessary to confirm these effects in humans. All three graders point in the same direction, with minor differences. Gemini comes in highest (95%), while OpenAI is lowest (85%). While the studies from UCLA suggest that creatine boosts immune cell energy and slows tumor growth in mice, there is currently no opposing evidence presented in the evidence pack. However, skepticism may arise from the fact that results in animal studies do not always replicate in human trials. This uncertainty does not significantly alter the overall positive assessment of the claim, but it highlights the need for additional research to validate these findings in humans before drawing definitive conclusions about creatine's effects on cancer immunity.