Methodology
The 5-level evidence system
Levels compare topics inside this database only. They are not medical approval or endorsement.
- Level A
Stronger Clinical Evidence
1,507 studies in databaseRelatively higher-quality human studies compared with other topics in this database, e.g. multiple RCTs or systematic reviews. This does not mean it is standard or approved care.
- Level B
Emerging clinical evidence with positive signals
2,699 studies in databaseSeveral human studies show positive signals, while research methods and sample sizes continue to develop.
- Level C
Early human research exploring benefits
5,784 studies in databaseEarly human evidence such as case series or small samples is exploring possible benefits.
- Level D
Scientific groundwork from lab and animal studies
42,825 studies in databaseEvidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.
- Emerging
Emerging topic under active research
3 studies in databaseCurrently limited data exists for this topic; researchers are continuing to study it to understand future benefit and safety.
What levels do not tell you
- • They do not mean SVF is approved to treat that condition.
- • They do not predict that you would get the outcomes seen in studies.
- • They do not replace assessment by your treating physician.