New Meta-Analysis Reveals What Creatine Really Adds to Resistance Training

[AlphaLifter]

Creatine is one of the most researched of all the sports supplements, and the question is, of course, how much of a benefit it actually provides in terms of your training results. A recent meta-analysis provides a more definitive answer: when creatine is combined with resistance training, it will improve both upper and lower body strength and increase lean body mass above and beyond the effects of training alone.

Published research from 63 studies involving 1489 participants makes a very clear distinction: creatine can support muscle development but is not a fat-burning supplement, and increased lean mass does not necessarily equate to increased muscle mass.

What the Latest Creatine Meta-Analysis Found​

The study is called “Resistance training combined with creatine supplementation: a three-level meta-analysis of multidimensional outcomes from strength enhancement to body composition remodeling”. It looked at the trials that compared resistance training with and without creatine supplementation.

Researchers searched the major scientific databases for studies published up to 21st April 2025. The analysis comprised 63 studies with 1489 participants and interventions of between 4 and 12 weeks' duration. All of the studies used creatine monohydrate.

Here are the main findings:

Outcome	Effect of adding creatine
Upper-body strength	Moderate improvement; Hedges' g = 0.54
Lower-body strength	Moderate improvement; Hedges' g = 0.55
Lean body mass	Small improvement; Hedges' g = 0.30
Total body mass	Very small increase; Hedges' g = 0.12
Body-fat percentage	Small reduction; Hedges' g = −0.14
Fat mass	No statistically significant difference

Source: Published meta-analysis. Hedges' g is a standardized effect size, not a direct prediction of kilograms gained or weight lifted.

How much stronger can creatine make you?​

The meta-analysis found a statistically significant improvement in both upper and lower body strength when creatine was combined with resistance training. The effect sizes (0.54 and 0.55, respectively) indicate a moderate advantage over training alone.

Creatine helps to replenish ATP (the energy source that the muscle uses during intense activity). Increasing the muscle's stores of creatine will help to restore ATP rapidly during repeated bouts of high-intensity activity (e.g., heavy lifting, sprinting).

This may help you maintain your performance across sets and get more productive training over time. Your results are still going to be down to training consistency, the work you do, your nutrition, your recovery, and your individual response. Creatine will help you build strength; it won't replace progressive overload.

Does creatine build more muscle?​

The researchers found a statistically significant improvement in lean body mass (effect size 0.30), which is a smaller benefit than the strength gains but one that may be of some significance over time.

It's vital to understand what lean body mass actually is. It's skeletal muscle, body water, and all the other non-fat tissues. Creatine works by increasing the amount of water held in the muscle cells, especially in the initial phase of supplementation.

An increase on the scale does not necessarily equate to an equivalent amount of new muscle tissue. Real muscle hypertrophy occurs as a result of consistent resistance training, sufficient protein intake, and recovery.

A separate meta-analysis of 61 trials also found that creatine plus resistance training resulted in an average increase in fat-free mass of 1.39kg compared to the control. The actual amount gained varies from study to study and from individual to individual.

Can creatine reduce body fat?​

The latest findings don't establish creatine as a fat loss supplement. There was a small reduction in body fat percentage in the study, but the difference in fat mass was not statistically significant.

Body fat % is fat mass as a percentage of total body weight. It can be altered by changes in lean mass and body water without any actual reduction in fat.

If you're after fat loss with muscle retention, then you need to get the calories right, you need adequate protein, and you need to do some regular resistance training. Creatine may help with training performance, but it won't in any way replace a sensible nutrition plan.

How to Take Creatine for Resistance Training​

Creatine monohydrate is by far the best-studied form when it comes to improving performance in high-intensity exercise and supporting gains in lean mass. For the majority of healthy adults, the approach is simply 3-5 g per day.

A loading phase is optional. One protocol that's often used is around 20g per day in smaller doses (say 2-3 g at a time) for 5-7 days, then reducing to 3-5 g per day. Alternatively, you can take 3-5 g per day consistently, and this will slowly build up your muscle creatine stores over several weeks.

Consistency is more important than exact timing. Just follow the product instructions, stay well hydrated, and if you've got any kind of kidney disease or other medical condition, then you'd be advised to talk to your doctor before you start supplementing.

Who benefits most from creatine?​

Creatine can be beneficial for novices, for the experienced lifter, and for the athlete doing repeated bouts of high-intensity exercise. Those people who are low in dietary creatine (many vegetarians and vegans) will have lower baseline muscle creatine stores and are likely to respond to supplementation.

However, the most recent meta-analysis did suggest that age may have an effect on the strength outcomes, with larger effects in the younger participants. These subgroup results are exploratory and should be interpreted with caution given the uneven representation of the groups. No consistent moderators were found for the body composition outcomes.

What the Research Cannot Tell Us Yet​

The results are positive, but the interventions included were only 4-12 weeks in duration, so we have very little evidence on long-term outcomes. Many of the studies were small, and the cohort was predominantly male, so we can't be confident in the generalisability of the findings to women or to other populations.

Further work is required to establish the long-term effects, individual differences, and the actual impact of creatine on muscle gain (rather than just lean mass).

The bottom line: is creatine worth it?​

The evidence points to creatine monohydrate being a good option for the regular resistance trainee. The most recent meta-analysis showed significant gains in upper and lower body strength, some increase in lean body mass, and no significant loss of fat mass.

Creatine works best as part of a consistent training program supported by adequate nutrition and recovery. It is not a shortcut to muscle growth or a substitute for fat-loss fundamentals.

If your goal is to get stronger and support muscle development, the research provides a strong reason to consider creatine monohydrate alongside a well-structured resistance training routine.