PRP vs. Stem Cell Therapy: Which Do You Actually Need?

PRP and stem cell therapy get lumped together as "regenerative medicine," but they're different treatments with different costs, mechanisms, and evidence. If you're weighing them for a joint or injury, here's how to decide — without the hype.

PRP vs. stem cells: the basics

Platelet-rich plasma (PRP) is made from your own blood. A small draw is spun in a centrifuge to concentrate platelets — typically 2–5× baseline — which are then injected into the target area. Platelets are packed with growth factors that signal healing. PRP contains no stem cells.

Stem cell therapy delivers living mesenchymal stem cells (from your fat, bone marrow, or donor cord tissue) that release anti-inflammatory and repair signals and can home to injured tissue.

How each one works

The practical difference is duration and intensity of signaling. PRP delivers a burst of growth factors that act over hours to days. Stem cells release repair signals over weeks, and may exert a more sustained anti-inflammatory effect. Both are "orthobiologics" — biological injections used for osteoarthritis, tendon, and cartilage problems.

What the evidence says

For knee osteoarthritis specifically:

• PRP has been shown superior to placebo, to hyaluronic acid, and to corticosteroid injections for pain and function, with a strong safety record. Guidelines (e.g., ESSKA) consider it appropriate for milder arthritis after conservative care fails — though not as a first-line or end-stage treatment.
• Stem cells carry broader recent meta-analytic support for moderate disease (Kellgren-Lawrence grades I–III) and may outperform PRP in some head-to-head data — but at higher cost and complexity.
• Notably, several studies suggest that a series of PRP treatments (2–3 sessions weeks apart) can produce results on par with stem cell therapy for many patients.

Cost comparison

PRP is consistently cheaper because it uses only your blood and a centrifuge — no cell harvesting, culturing, or donor product. In the US, PRP averages around $900 per injection while stem cell injections average roughly $3,100 (and range much higher). In Colombia, both cost dramatically less.

Note that for advanced stem cell protocols, Colombia's total cost can still land below US pricing while delivering higher cell counts — the comparison depends on exactly what's included.

Which should you choose?

Can you combine them?

Yes — some protocols pair stem cells with PRP, using PRP as a "scaffold" of growth factors to support the cells. Whether that adds meaningful benefit over either alone isn't firmly established, so ask your clinic to explain the rationale and cost.

In Colombia

Colombian regenerative clinics offer both PRP and stem cell protocols at a fraction of US prices, often with image-guided injection. Because PRP is inexpensive, it can be a sensible first step — or a lower-cost option to try before committing to a stem cell protocol.