Forbes et al. 2022: Creatine and Lean Body Mass in Older Adults — A Systematic Review and Meta-Analysis

TL;DR — Forbes et al. 2022

In 2022, Forbes, Candow, Ostojic, Roberts, and Chilibeck published a systematic review and meta-analysis in Nutrients examining whether creatine supplementation enhances the effects of resistance training on lean body mass in older adults. Pooling data from 721 participants across multiple RCTs, they found that creatine plus resistance training increased lean body mass by 1.37 kg more than resistance training with placebo (SC et al., 2022) . This provides strong evidence supporting creatine as a practical intervention for combating age-related muscle loss.

Study Background and Rationale

Sarcopenia — the age-related loss of skeletal muscle mass and function — is one of the most significant health challenges facing aging populations worldwide. Beginning as early as age 30, adults lose approximately 3-8% of their muscle mass per decade, with the rate accelerating after age 60. Sarcopenia increases the risk of falls, fractures, loss of independence, and mortality.

Resistance training is the primary intervention for sarcopenia, but its effectiveness is limited in older adults compared to younger populations. Researchers have long been interested in whether nutritional supplements like creatine could enhance the muscle-building response to resistance training in older adults.

Earlier work by Candow et al. (2014) had shown promising results in individual trials (DG et al., 2014) , but the field needed a comprehensive meta-analysis to determine the true magnitude of creatine’s effect across multiple studies and populations.

Study Design and Methodology

The review followed PRISMA guidelines and included:

Search strategy:

• Systematic searches of PubMed, MEDLINE, SPORTDiscus, and the Cochrane Library
• Search terms combining creatine supplementation, resistance training, and older adults

Inclusion criteria:

• Randomized controlled trials
• Participants aged 50 years or older
• Creatine monohydrate supplementation combined with resistance training
• Lean body mass as a measured outcome
• Comparison to placebo plus resistance training

Statistical analysis:

• Random-effects meta-analysis to account for between-study variability
• Subgroup analyses by study duration, sex, and dosing protocol
• Assessment of publication bias and study quality

Sample: The final analysis included data from 721 participants across multiple RCTs, making this one of the largest meta-analyses focused specifically on creatine in older populations.

Key Findings

1. Creatine plus resistance training increased lean body mass by 1.37 kg beyond placebo

The pooled analysis showed a statistically significant and clinically meaningful difference: older adults who supplemented with creatine during resistance training gained 1.37 kg more lean body mass than those who trained with placebo. For context, this is a substantial amount of lean tissue for an older population and could meaningfully impact functional capacity.

2. Greater effects with longer study durations

Studies lasting 12 weeks or more showed larger between-group differences than shorter studies. This finding aligns with the established understanding that creatine’s benefits compound over time: muscle creatine saturation takes time, and the downstream effects on training adaptations (increased work capacity, enhanced recovery) accumulate progressively.

3. Consistent effects across subgroups

The meta-analysis found positive effects regardless of:

• Sex (both males and females benefited)
• Specific resistance training protocol
• Creatine dosing strategy (loading vs. daily dosing)

This consistency strengthens the conclusion that creatine is broadly effective in older adults, not just in specific subpopulations.

4. No significant adverse effects

Importantly, the meta-analysis did not identify any significant adverse effects associated with creatine supplementation in older adults. This is consistent with the broader safety evidence summarized in the ISSN position stand (RB et al., 2017) .

Why This Meta-Analysis Matters

Clinical significance: The 1.37 kg difference in lean body mass is clinically meaningful in older adults. Even modest increases in muscle mass can translate to improved strength, balance, and functional independence — reducing the risk of falls and improving quality of life.

Public health implications: With global populations aging rapidly, sarcopenia is becoming a major public health concern. Creatine supplementation is inexpensive, safe, and widely available — making it an accessible intervention that could be implemented at scale.

Builds on prior evidence: This meta-analysis builds upon earlier individual trials and the earlier Branch (2003) meta-analysis (JD, 2003) , providing the most focused and up-to-date evidence for creatine’s effects in older adults specifically.

Malaysian Context

Malaysia’s aging population makes the Forbes 2022 findings particularly relevant:

Demographic shift: Malaysia is projected to become an aged nation by 2030, with over 15% of the population aged 60 and above. Sarcopenia prevention strategies are increasingly important.

Affordability: Creatine monohydrate is one of the most affordable supplements available in Malaysia. A month’s supply at 5 g/day costs approximately RM 30-60 when purchased from Shopee or Lazada — far more cost-effective than many prescription interventions.

Cultural context: Many older Malaysians may be unfamiliar with creatine, associating it primarily with young bodybuilders. The Forbes 2022 evidence helps reframe creatine as a health-promoting supplement for all ages, including warga emas (senior citizens).

Integration with exercise programs: Malaysia’s “Aktif Senior” and similar community exercise programs could potentially incorporate creatine supplementation guidance, given the strong evidence for its synergistic effects with resistance training in older adults.

Limitations

• Lean body mass is a composite measure: DEXA-measured lean mass includes water, and creatine promotes intracellular water retention. Some of the lean mass gain may reflect increased cell hydration rather than contractile protein
• Study quality varied: While all included studies were RCTs, they varied in methodological quality, blinding, and outcome reporting
• Limited ethnic diversity: Most included studies were conducted in Western populations, and results may not be fully generalizable to Southeast Asian populations
• Training adherence not always reported: Compliance with both creatine supplementation and resistance training protocols varied across studies
• Functional outcomes not the primary focus: While lean mass is important, the meta-analysis did not primarily examine functional outcomes like strength, balance, or fall risk

Practical Implications

1. Older adults should consider creatine: The evidence strongly supports creatine supplementation alongside resistance training for maintaining and building lean mass
2. Start with 3-5 g/day: The standard maintenance dose is effective and well-tolerated in older adults
3. Commit for at least 12 weeks: Longer supplementation periods produce greater results
4. Combine with resistance training: Creatine alone may have limited effects — it enhances the response to exercise
5. It is safe for healthy older adults: No significant adverse effects were reported across the included trials
6. Discuss with your doctor if you have kidney disease: While creatine is safe for healthy individuals, those with pre-existing kidney conditions should consult their healthcare provider

Full Citation

Forbes SC, Candow DG, Ostojic SM, Roberts MD, Chilibeck PD. Creatine supplementation and resistance training: a systematic review and meta-analysis of effects on lean body mass in older adults. Nutrients. 2022;14(6):1266. doi:10.3390/nu14061266

Sources & References

This article is based on the systematic review and meta-analysis published in Nutrients (2022) and contextualized with findings from Candow et al. (2014), Kreider et al. (2017), and Branch (2003). All citations link to PubMed-indexed publications.

Further Reading

• creatine dosage guide
• creatine safety profile
• creatine monohydrate
• creatine for muscle building
• creatine loading phase
• creatine and water retention