| Dimension | Scoring Notes | Score |
|---|---|---|
| Study Design | Dozens of independent Human RCTs plus multiple meta-analyses across strength, cognition, recovery, and body composition. The ISSN position stand synthesizes hundreds of trials. Clearest 25/25 in the catalog. |
25 / 25 |
| Sample Size | Thousands of participants across the evidence base. Meta-analyses alone include hundreds per study. |
20 / 20 |
| Replication | Research groups across 20+ countries have independently replicated creatine's performance effects. Among the most replicated findings in sports nutrition. |
20 / 20 |
| Journal Impact Factor | Primary journals: JISSN (IF 3.7), Nutrients (IF ~4), Int J Sport Nutr Exerc Metab (IF ~4.6). Solid Q1 journals in their field. |
12 / 15 |
| Funding Independence | Mixed. Many studies independently funded through universities and NIH. However creatine supplement industry (Creapure, AlzChem) funds a meaningful portion. |
7 / 10 |
| Population Diversity | Studied across men and women, young athletes to elderly, multiple countries. Minor deduction for early foundational studies being predominantly male athletes. |
4 / 5 |
| Researcher h-Index | Richard Kreider (Texas A&M), lead creatine researcher, h-Index 83 with 28,000+ citations. |
5 / 5 |