pros and cons of stem cells

Stem cells may help regenerate damaged tissue and support recovery, but their effectiveness and safety remain uncertain.

1. Research and trials: Researchers are exploring stem-cell treatments for joint problems and neurological disorders. In an early Stanford trial for stroke, some patients improved in movement or speech, but results varied and controlled studies are still needed. 1 2
2. Severe complications: Poorly regulated treatments have caused serious harm. After a clinic injected stem cells into patients’ eyes for macular degeneration, several patients became irreversibly blind. 3
3. Limited oversight and evidence: Many marketed treatments are unproven, and some are not approved or adequately overseen. Clinicians caution that patients may not know what cells they are receiving; rigorous trials are needed to establish safety and benefit. 4 5
4. Tumor risk: Stem cells can develop into different cell types, so their differentiation must be carefully controlled; otherwise, they may form tumors. 6
5. PRP uncertainty: PRP is sometimes promoted as a stem-cell treatment, but it contains very few, if any, stem cells. Whether its effects are due to the PRP itself or the injection procedure has not been clearly established. 7