What research stage is stem-cell therapy for Osteoporosis & Bone Health at?
Confirmatory-phase work accounts for 0 of the 14 records here; the remainder is dose-finding, safety or observational (2026-08-29).
Phase distribution
| Phase label | Records | Share |
|---|---|---|
| Phase 2 | 5 | 33% |
| Phase 1 | 5 | 33% |
| Not applicable | 5 | 33% |
What the phase mix means for Osteoporosis & Bone Health
The cell-specific base is early. Meanwhile the comparator drugs have run large fracture-endpoint trials, so the evidential gap between options here is unusually wide.
The later-phase studies themselves
No registered study for this condition carries a Phase 3 or Phase 4 label in this snapshot. That is the single most useful fact on this page: the confirmatory stage has not been reached.
How to read phase labels
Early phases exist to find harm and set a dose. They are not built to detect benefit, and they routinely produce encouraging-looking numbers that later trials fail to reproduce. Only a confirmatory design with a comparison arm can separate the intervention from everything else happening to a patient.
Median planned enrolment across sampled studies here is 37 participants. Small single-arm studies can flag safety problems; they cannot separate a treatment effect from natural fluctuation, placebo response or regression to the mean.
The largest studies by planned enrolment
Size is a crude proxy for what a study can detect, but it separates a serious attempt from a case series presented as evidence.
| Study | Phase | Status | Planned n | Lead sponsor | Start |
|---|---|---|---|---|---|
| NCT06065852 — National Registry of Rare Kidney Diseases | n/a | Recruiting | 35,000 | UK Kidney Association | 2009-11-06 |
| NCT02985424 — Polymyalgia Rheumatica and Giant Cell Arteritis | n/a | Unknown | 80 | Svendborg Hospital | 2017-05 |
| NCT00321932 — Zoledronic Acid in Preventing Osteoporosis in Patients Undergoing Donor Stem Cell Transplant | Phase 2 | Completed | 61 | University of Minnesota | 2005-07 |
| NCT03197623 — Safety and Tolerability of Intravenous LLP2A-Alendronate for Osteopenia Secondary to Glucocorticoids | Phase 1 | Completed | 58 | Nancy E. Lane, MD | 2016-10-14 |
| NCT01656629 — Stem Cell Recruitment in Osteoporosis Therapy | n/a | Terminated | 55 | Johns Hopkins University | 2012-08 |
Frequently asked
What research stage is stem-cell therapy for Osteoporosis & Bone Health at?
0 of 14 records are labelled Phase 3 or 4 (2026-08-29).
Is a Phase 3 trial proof that it works?
No — it is a design capable of testing that question. Proof depends on the reported result, replication, and whether the outcome measured matters to patients.
Why do so many records have no phase?
Observational studies and some cell-therapy protocols are registered without a phase label. It is a registry field, not a quality rating.
Registry and literature counts retrieved 2026-08-29 (ClinicalTrials.gov API v2; PubMed E-utilities). Registration or publication volume measures research activity, not effectiveness or approval. Educational information — not medical advice; verify product, indication, legal pathway and evidence with an independent qualified physician. Page generated 2026-08-29. See our editorial standards.