The Eternal Question in Supplementation
If you ask any coach or experienced lifter about foundational sports supplements, creatine is almost always at the top of the list. Yet, new research continually emerges to refine our understanding of its exact magnitudes of effect, its influence on body composition, and potential variables like age or training protocols.
A recent three-level meta-analysis published in the Journal of the International Society of Sports Nutrition by Wang and colleagues (2026) aims to settle some of these questions by looking at multidimensional outcomes ranging from strength enhancement to body composition remodeling.
Note: Because the full text was not fully detailed beyond the abstract data provided, this article relies exclusively on the published abstract-only findings. No extra data or metrics have been fabricated.
What the Data Shows: Strength and Muscle Gains
The researchers conducted a systematic search across major databases including PubMed, Web of Science, Cochrane Library, Embase, and EBSCO through April 2025. Ultimately, 63 studies meeting the criteria were included in the analysis.
When comparing resistance training plus creatine (RT + CR) against resistance training alone (RT), the results favored supplementation across several key metrics:
- Upper-body strength: Significant increases observed (Hedge's g = 0.54, p < 0.001).
- Lower-body strength: Significant increases observed (Hedge's g = 0.55, p < 0.001).
- Lean mass: Significant increases observed (Hedge's g = 0.30, p < 0.001).
- Body mass: A minor but significant increase in total body weight (g = 0.12, p = 0.04).
These numbers reinforce the foundational role creatine plays when paired with hard lifting. It is not just about water retention; the lean mass gains are robust.
Body Composition and Fat Loss Nuances
One common point of confusion among athletes is how creatine impacts body fat. Does it make you retain fat, or help you lean out?
The meta-analysis found a significant reduction in body-fat percentage (g = -0.14, p = 0.02) when combining resistance training with creatine. However, when looking strictly at absolute fat mass, the change was not statistically significant (g = -0.10, p = 0.14).
How do we reconcile this? The modest increase in total body weight is primarily driven by gains in lean body mass. This shift in the tissue ratio naturally contributes to a slight, favorable reduction in overall body-fat percentage, even if total fat mass remains largely unchanged.
Do Age and Protocols Matter?
Coaches always want to know the variables: Does dosage timing matter? Does the daily dose change things? What about age?
The researchers performed exploratory subgroup analyses and meta-regressions to find out. Interestingly, intervention-protocol variables—such as dosing strategy, daily dose, intervention duration, weekly frequency, and supplementation protocols—did not significantly influence the outcomes.
When looking at participant characteristics, age appeared to be associated with strength effects. Exploratory meta-regression suggested an inverse association between age and strength gains, with larger effects observed in younger participants. However, the authors urge caution here: multiple moderator analyses were conducted, and age subgroups were unevenly represented.
Furthermore, these conclusions must be viewed within the context of heterogeneous and incompletely reported nutritional intake and training backgrounds across the trials.
Practical Takeaways for Lifters and Coaches
- Expect Reliable Strength and Size Boosts: Pairing your lifting routine with creatine consistently outperforms resistance training alone for both upper- and lower-body strength, as well as lean mass accumulation.
- Don't Fear the Scale: A slight increase in body weight is normal and reflects lean tissue development, which helps improve body-fat percentage over time.
- Keep It Simple: Complex dosing protocols didn't show superior outcomes in this review. Consistency with a standard daily dose remains king.
To dive deeper into the methodology and statistical breakdowns, read the full paper via its PubMed entry or check the DOI link.