Do stem cell injections cure knee arthritis?

No. Stem cell injections have not been shown to cure arthritis or reliably regrow cartilage. Most of the cells used act as signaling cells that may reduce inflammation and ease symptoms rather than building a new joint surface. Studies suggest some people get pain and function relief, but the evidence is still early, and severe bone-on-bone arthritis responds less well.

Is PRP better than stem cell injections for the knee?

PRP has the stronger evidence base of the two for mild to moderate knee osteoarthritis, with several trials showing reduced pain and improved function, sometimes longer lasting than other injections. Stem cell injections show early promise but rest on smaller, more varied studies. Results depend heavily on the preparation method and the severity of the arthritis.

Are stem cell injections FDA approved for knees?

Many are not. The FDA has warned that numerous marketed stem cell products are unapproved and carry risks. Some procedures using a person's own minimally processed tissue in the same visit sit in a different category, but donor or amniotic products sold as living cells often fall outside what the FDA has cleared. Always ask what is being injected and its status.

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