Marc Darrow MD, JD. Thank you for reading my article. You can ask me your questions about  this article using the contact form below. 

This is a very frequent question that I get via email. “Can I get a Synvisc or other type of hyaluronic acid injection while I get stem cell therapy treatments?”

    • Our answer is, this is not something we do, we do not offer hyaluronic acid injections.
  • In this article you will see that  research suggests that one of the healing factors of stem cell therapy is its ability to stimulate the production of naturally occurring Hyaluronic acid and enhance the viscosity and thickness of your own synovial joint fluid. Therefore, synvisc injection after stem cell treatment or in between stem cell treatments is not something we would generally recommend.

Many patients we see have been researching their options in treating their chronic joint pain. These people come to see us because they are exploring non-surgical alternatives and have investigated various forms of regenerative medicine techniques. This includes the use of their own blood platelets as a healing solution, (more commonly referred to as Platelet Rich Plasma Therapy) or stem cell therapy which we will discuss below in relation to hyaluronic acid injections.

Many of these patients, perhaps including yourself as well, have had prior discussion with doctors about hyaluronic acid injections. These injections can provide a good amount of pain relief, temporarily. But ultimately they do not regenerate tissue and they are only a stop gap measure to delaying inevitable joint replacement.

  • Hyaluronic acid is a naturally occurring substance that is a major component of the protective synovial fluid that surrounds the knee. In its natural form it is also a key component of wound healing. In its processed form used for injection purposes, hyaluronic acid is NOT a key healing component as attested to by suggestions and recommendations that these injections are stop gaps until knee replacement can be performed.

Hyaluronic Acid Injections “buying time,” until you are ready for knee replacement

  • A study in the journal Public Library of Science one (1agrees with the current beliefs that Hyaluronic Acid Injections are at best, a treatment best used to help delay inevitable total knee replacement. How much so? In this research, the patients of the study were able to delay knee replacement for about 1.5 years on average.
  • To some researchers, this delay to knee replacement is so small that they suggest Hyaluronic Acid Injections are a waste of time, money, and resources. Some patients should be encouraged to proceed directly to the knee replacement and not consider the Hyaluronic Acid Injections. The research from the journal American Health and Drug Benefits suggest that patients over the age of 70 should proceed to total knee replacement as opposed to intra-articular injections of steroids or hyaluronic acid  to save on national health care costs.(2)

As many of you know first-hand, Hyaluronic acid injections, commonly known as Euflexxa®, Supartz®, Supartz FX®, Hyalgan®, Synvisc®, HYMOVIS®etc, is an attempt to restore the knee’s synovial fluid’s lubrication properties through viscosupplementation and restoration of  lost hyaluronic acid levels. These injections can not be given over long periods of time as their effect dwindles to the point of providing no benefit. This is outlined in the medical research.

Controversy as to whether Hyaluronic Acid Injections cause side-effects

There is a controversy surrounding not only the long-term / short-term benefits of hyaluronic acid injections, but also, as to whether or not these injections cause unwanted adverse reactions.

  • Doctors at Bern University Hospital in Sweden suggested in their published research in the Annals of internal medicine (3) that in patients with knee osteoarthritis, viscosupplementation offered a small and clinically irrelevant benefit and an increased risk for serious adverse events.
  • In another larger study in the French medical publication Prescribe International, researchers found that hyaluronic acid injections only provided a small relief to patients with osteoarthritis of the knee, but agreed that hyaluronic acid injections could provoke both local reactions and serious adverse effects.”(4)
  • In the Annals of rheumatic disease, doctors recently warned that while Hyaluronic acid injections can provide significant pain relief and improvement in the knee – This may cause excessive loading on the knee joints, which may further accelerate the rate of knee degeneration.(5)

There has been some research to suggest that hyaluronic acid injections do not cause adverse effects, but a May 2019 study challenged this notion.In the journal Drugs & Aging (4) a multi-national team of researchers suggested:

  • “(In reviewing the) available data on studies without any concomitant anti-osteoarthritis medication permitted during clinical trials, hyaluronic acid injections seems not to be associated with any safety issue in the management of osteoarthritis. However, this evidence was associated with only a “low” to “moderate” certainty. A possible association with increased risk of serious adverse effects, particularly when used with concomitant osteoarthritis medications, requires further investigation.”

In brief, the evidence is not good that hyaluronic acid injections are safe and further, they seem to cause worse adverse effects when used in conjunction with other osteoarthritis medications..

When Hyaluronic acid works best? When it is naturally produced in the body and provides a self-renewing source of joint protection

The reason you may have been recommended to Hyaluronic acid injections is that you have none or very little of your own. Your body, for the most part has stopped producing it or that which your body produces is a weakened, diluted product ravaged by incessant inflammation. Stem cell therapy may be able to reverse this problem and “re-open” Hyaluronic acid production.

  • There is new fascinating research about the inter-relationship between natural hyaluronic acid and stem cell therapy. Here is where we will get into the research and discussions surrounding stem cell therapy’s ability to increase the natural production of hyaluronic acid in osteoarthritic knees.

A paper published in the Journal of orthopaedic research (6) from researchers at Tokyo Medical and Dental University made these observations:

  • First, the researchers investigated whether mesenchymal stem cells in synovial fluid increased in the knee with degenerated cartilage and osteoarthritis.
    • Observation: The number of stem cells found in the synovial fluid of patients with good knees and little of no degenerative problems were “hardly noticed.”
    • Observation: The number of stem cells found in the synovial fluid of patients with degenerative knee disease or injury  increased along with degenerated cartilage and osteoarthritis.

Stem cells “re-hydronate” the synovial fluid with natural hyaluronic acid.

In other words, as there was more knee damage, stem cells were making their way to the damaged knee. Many stem cells found their way to the synovial fluid.There they could help with the production of natural hyaluronic acid and help produce more of the natural and protective fluid.

  • This unique relationship between stem cells and hyaluronic acid was also noted by doctors at the University of Leeds in the UK who suggested a spontaneous healing of cartilage in a newly created  “favorable biochemical and biomechanical (knee) environment.(7)

Research like that presented above begs the question: Why get short lasting viscosupplementation when stem cell therapy can change the healing environment of the knee to produce its own?

Are you a candidate for treatment? Ask Dr. Darrow


A leading provider of stem cell therapy, platelet rich plasma and prolotherapy
11645 WILSHIRE BOULEVARD SUITE 120, LOS ANGELES, CA 90025

PHONE: (800) 300-9300

1. Altman R, Lim S, Steen RG, Dasa V. Hyaluronic Acid Injections Are Associated with Delay of Total Knee Replacement Surgery in Patients with Knee Osteoarthritis: Evidence from a Large U.S. Health Claims Database. PLoS One. 2015 Dec 22;10(12):e0145776. doi: 10.1371/journal.pone.0145776. eCollection 2015
2. Pasquale MK, Louder AM, Cheung RY, Reiners AT, Mardekian J, Sanchez RJ, Goli V. Healthcare Utilization and Costs of Knee or Hip Replacements versus Pain-Relief Injections. Am Health Drug Benefits. 2015 Oct;8(7):384-94.
3 Rutjes AWS, Jüni P, MD; da Costa BR, et al. Viscosupplementation for Osteoarthritis of the Knee: A Systematic Review and Meta-analysis. Ann Intern Med. 2012 Jun 11.
2, Intra-articular hyaluronic acid injection: not for gonarthrosis. Prescrire Int. 2013 Oct;22(142):248-9.
4 Tang AC, Tang SF, Hong WH, Chen HC. Kinetics features changes before and after intra-articular hyaluronic acid injections in patients with knee osteoarthritis. Clin Neurol Neurosurg. 2015 Feb;129 Suppl 1:S21-6. doi: 10.1016/S0303-8467(15)30007-X.
5 Honvo G, Reginster JY, Rannou F, Rygaert X, Geerinck A, Rabenda V, McAlindon T, Charles A, Fuggle N, Cooper C, Curtis E, Arden N, Avouac B, Bruyère O. Safety of Intra-articular Hyaluronic Acid Injections in Osteoarthritis: Outcomes of a Systematic Review and Meta-Analysis. Drugs Aging. 2019;36(Suppl 1):101-127. doi: 10.1007/s40266-019-00657-w. Epub 2019 May 9. PubMed PMID: 31073925; PubMed Central PMCID: PMC6509101.
6 Sekiya I, Ojima M, Suzuki S, Yamaga M, Horie M, Koga H, Tsuji K, Miyaguchi K, Ogishima S, Tanaka H, Muneta T. Human mesenchymal stem cells in synovial fluid increase in the knee with degenerated cartilage and osteoarthritis. Journal of Orthopaedic Research. 2012 Jun;30(6):943-9.
7. Baboolal TG, Mastbergen SC, Jones E, Calder SJ, Lafeber FPJG, McGonagle D. Synovial fluid hyaluronan mediates MSC attachment to cartilage, a potential novel mechanism contributing to cartilage repair in osteoarthritis using knee joint distraction. Annals of the Rheumatic Diseases. 2016;75(5):908-915. doi:10.1136/annrheumdis-2014-206847.
9. Sánchez M, Fiz N, Azofra J, et al A Randomized Clinical Trial Evaluating Plasma Rich in Growth Factors (PRGF-Endoret) Versus Hyaluronic Acid in the Short-Term Treatment of Symptomatic Knee Osteoarthritis. Arthroscopy. 2012 Aug;28(8):1070-8.

1123/1523 (400)