Stem cell basics
What are stem cells?
Stem cells are early, adaptable cells that help the body build, maintain, and repair tissues. They are different from mature cells because they can renew themselves and, in the right setting, develop into more specialised cell types.
Why the details matter
This does not mean that every stem-cell treatment can regrow any tissue, cure disease, or reverse ageing. In medicine, the important question is not simply "are stem cells used?" but: what type of cells are being used, where do they come from, how are they prepared, and what condition are they being used to treat?
Why are stem cells important?
Stem cells matter because they are part of the body's natural repair and renewal systems. Researchers study them to understand healing, inflammation, tissue damage, ageing, immune disease, and conditions where cells are lost or no longer work properly.
Some stem-cell treatments are already established in medicine. The best-known example is hematopoietic stem-cell transplantation, often called bone marrow or blood stem-cell transplantation, which is used for selected blood cancers and immune conditions.
Many other uses of stem cells are still being studied. This includes research in joints, cartilage, wounds, heart disease, diabetes, neurological conditions, autoimmune disease, and tissue engineering.
Different types of stem cells
Not all stem cells are the same.
Hematopoietic stem cells
HSCs are blood-forming stem cells. They live mainly in bone marrow and can produce the different cells found in blood and the immune system.
Mesenchymal stromal or stem cells
MSCs are cells found in tissues such as bone marrow, fat, and umbilical cord. They are being studied for possible effects on inflammation, tissue repair, and cell signalling.
Embryonic stem cells
These can develop into many different cell types, but their use raises ethical and regulatory issues and they are not the same as the treatments usually discussed in clinics.
Induced pluripotent stem cells
iPSCs are adult cells reprogrammed in the laboratory to behave more like early stem cells. They are powerful research tools, but most clinical uses remain experimental.
Where do stem cells come from?
Bone marrow
Bone marrow contains blood-forming stem cells and other cell populations. It is used in established transplant medicine and is also studied in orthopaedic and regenerative settings.
Fat tissue
Adipose, or fat tissue, contains cells being investigated in musculoskeletal, wound-healing, and reconstructive medicine.
Peripheral blood
Stem cells can sometimes be mobilised from bone marrow into the bloodstream and collected for transplant purposes.
Umbilical cord and perinatal tissues
Umbilical cord, placenta, and related tissues are studied because they contain young cells and signalling molecules. Products from these sources vary widely and should be understood as donor-derived, regulated biological products.
Autologous and allogeneic treatments
An autologous treatment uses cells or tissue taken from your own body. An allogeneic treatment uses cells or tissue from a donor.
This difference matters. It affects regulation, safety, immune reactions, manufacturing, cost, and how much evidence is needed before a treatment can be responsibly offered.
Are PRP and PRF stem-cell treatments?
No. PRP and PRF are regenerative treatments, but they are not stem-cell treatments. PRP, or platelet-rich plasma, uses a concentrated part of your blood that contains platelets and growth factors. PRF, or platelet-rich fibrin, is another blood-derived preparation that forms a fibrin matrix and may release signalling molecules over time.
These treatments aim to support healing biology, but they do not contain the same type of stem-cell product as bone marrow, fat-derived, or laboratory-expanded cell therapies.
What should patients ask?
Stem-cell science is promising, but the field is often oversimplified. Some treatments are established. Some are promising but still being tested. Others are marketed well ahead of the evidence.
- What exactly is being used?
- Is it my own tissue or donor tissue?
- How is it prepared?
- What condition is it meant to treat?
- What evidence supports it for that condition?
- What are the known risks?
- Is it approved, regulated, or experimental?
The goal of this site is to help patients and clinicians ask better questions, understand the evidence, and separate realistic medical progress from hype.
Evidence platform for regenerative medicine
Clear, evidence-based guidance on stem cells and regenerative medicine.
Dr Stemcells helps patients, clinicians, and educators understand what is established, what is promising, and what remains experimental in stem-cell and regenerative medicine.
What the site is for
The aim is to separate hope from hype while keeping the science accessible. The site brings together plain-language education, structured research summaries, and practical clinical context.
Plain-language learning
Clear explanations of stem cells, MSCs, HSCs, PRP, PRF, exosomes, tissue engineering, and why treatment details matter.
Evidence mapping
A research repository organized by organ system, publication year, trial status, outcome direction, and clinical readiness.
Patient-centred caution
Responsible discussion of evidence, regulation, consent, safety, durability, and disease-specific claims.
Clinician education
Teaching, seminars, courses, and practical guidance for clinicians interested in regenerative medicine.
Choose your starting point
Use the site according to what you need today.
New to the subject?
Start with the patient-focused explanation of what stem cells are, where they come from, and how they differ from PRP and PRF.
Checking the evidence?
Use the repository to scan current research by disease area, organ system, study type, and reported outcome.
Looking for teaching?
Clinicians can explore individual teaching, seminars, courses, and hands-on guidance with price on application.