Author: Marc Darrow

Marc Darrow, M.D., J.D., is one of the world’s most experienced Regenerative Medicine doctors. He has more than 30 Years of expertise in regenerative medicine techniques and has treated thousands of patients. He uses non-surgical therapy to reduce pain in joints, tendons, ligaments, and a variety of other ailments and disorders throughout the body, including back and neck discomfort. He taught at UCLA and received Board Certification in Physical Medicine and Rehabilitation.

PRP, Bone Marrow, or Wharton’s Jelly for Knee Pain?

By Marc Darrow, MD, JD Before considering an injection for knee pain, I want the patient to understand two things: what is causing the pain and what the proposed preparation actually contains. The label “stem cell treatment” does not answer either question. PRP comes from a patient’s blood. Bone marrow aspirate concentrate comes from marrow […]

Stem Cell Therapy for Patellar Tendinopathy and Chondromalacia Patellae

Stem cell therapy offers a personalized approach for patellar tendinopathy, using your own cells to support healing and address stubborn knee pain.

Exosomes and osteoarthritis

Osteoarthritis is often described as simple “wear and tear,” but the condition is more complex than cartilage gradually thinning over time. It involves a combination of inflammation, cartilage breakdown, changes in the joint lining, stress on cartilage-producing cells, and remodeling of the bone beneath the joint surface. Together, these processes can contribute to pain, stiffness, […]

Stem Cell Therapy for Knee Osteoarthritis

Explore the latest research on stem cell therapy for knees, focusing on bone marrow-derived treatments for knee osteoarthritis and their potential benefits.

Identifying the Real Source of Pain | Stem Cell Institute Radio 2-14-26 Part 2

When faced with pain in your back or joints, it is important to recognize that surgery may not always be the optimal solution. Surgical procedures often carry risks, particularly those involving the removal of tissue. Instead, consider innovative therapies that focus on healing and rejuvenating the affected areas. Treatments such as stem cell treatments, platelet-rich […]

Stem cell therapy for chronic plantar fasciitis

Marc Darrow, MD, JD. Doctors may offer stem cell injection therapy to plantar fasciitis patients as a non-surgical and regenerative approach to rebuilding damaged tissue. In our practice, ultrasound guidance is used to help place the treatment. The goal of the treatment is to rebuild damaged and strengthen soft tissue. By supporting healing of the […]

Common Ligament Injuries | Stem Cell Institute radio 1-31-26 Part 2

Ligaments are strong structures that connect bone to bone, crossing joints and providing essential stability. They contain pain receptors and specialized mechanoreceptors, which contribute to proprioception—the body’s sense of position, tension, load, and movement. When ligaments are damaged, the resulting symptoms can include pain, decreased coordination, and impaired movement, which are often most noticeable in […]

Understanding and Treating Ligament Injuries | Stem Cell Institute Radio 1-31-26 Part 1

Ligaments are often misunderstood body parts. While people frequently focus on anatomical structures that are surgically treated, supportive structures around joints, like ligaments, play a crucial role. Ligaments, from the Latin “legare” (to bind or tie), are strong ropes of tissue that connect bone to bone—specifically, to the outer covering of the bone called the […]

Is neck surgery designed to prevent further degeneration of the cervical spine always necessary?

Marc Darrow, MD. JD. I frequently see patients who have been told by another physician that they require neck surgery. This procedure, they are told, is necessary to avert further deterioration of their cervical spine. Many of these patients are frightened by the information provided by their doctor. Some have been warned that if their […]

Stem Cell Therapy for TMJ

Publishing in the journal Stem Cells International, (1) researchers indicated that Mesenchymal stem cells, from the bone marrow, act as seed cells for helping cartilage grow back in TMJ osteoarthritis. They also help fix the abnormal changes happening in the subchondral bone, which is the jaw bone located under the TMJ cartilage. The study highlights […]

Can stem cell therapy be a realistic knee replacement alternative? Stem Cell Institute Los Angeles

Get the facts on degenerative knee stem cells, including pros, cons, safety, and what to expect from this innovative treatment for chronic knee pain.

SLAP Tear Stem Cell Treatment in Los Angeles

Find out how SLAP tear stem cell treatment offers a non-surgical option for shoulder pain, with details on recovery, safety, and what to expect.

Stem Cell Therapy for Thumb Osteoarthritis in Los Angeles

Marc Darrow, MD, JD. A significant number of individuals who reach out to our office in search of treatment for thumb pain have previously undergone a lengthy series of treatments with minimal success. Many will admit that their physicians are now suggesting pain management strategies (such as anti-inflammatories and painkillers) as their main course of […]

How stem cells reduce inflammation

Curious about how stem cells reduce inflammation? Learn how they calm immune responses and support your body’s natural healing in this easy-to-follow guide.

Stem Cell Therapy for Sciatica: Stem Cell Institute Los Angeles

Find out how stem cells for sciatica can help relieve nerve pain, repair damaged tissue, and support long-term recovery with this practical, friendly guide.

Can stem cell therapy regenerate meniscus tissue?

Marc Darrow, MD. In this article we will focus on how a meniscus tissue can be regenerated. In many cases, a meniscus can heal itself or can heal with a little repair. One aspect of meniscus repair borne out by research is that your meniscus is always trying to make more meniscus. Can stem cell […]

Stem Cells for Shoulder Injury

Find out how stem cells for shoulder injury can help you recover naturally, reduce pain, and restore movement with a minimally invasive treatment option.

Stem Cell Therapy for Hair Loss: Your Complete Guide

Stem Cell Therapy for Hair uses your body’s own cells to help restore thinning hair. Learn how it works, who’s a good candidate, and what to expect.

SLAP Tear surgery vs non-surgical treatment options

Get the facts on SLAP tear shoulder surgery, including labrum repair, biceps tenodesis, recovery, and non-surgical options for lasting shoulder relief.

PRP Hamstring Recovery Time: Your Complete Guide

Learn how PRP therapy can aid hamstring injuries and understand the PRP hamstring recovery time for a faster return to your daily activities.

Chronic Shoulder Instability and Dislocation

If you have received the surgical recommendation for chronic shoulder dislocations you have already been advised of the possibility of a 6 month post-surgical recovery, that is on top of the waiting time to get the surgery. You may also have been told that you should have a realistic expectation that a second surgery may […]

Wendy M.

March 30, 2026

Please...Please... Before you consider surgery... Please do this! My fiance was looking at another shoulder surgery.. something I considered risky because of his heart surgery and Traumatic Brain Injury... plus the down time and pain.. ... He's very active, rides horses.. lifts heavy saddles..heavy hay... He was told he may need a few treatments, and still I was able to talk him into it.. He has had ONE treatment.. and he said he is about 99% better.. no pain... when his pain WAS anywhere from a 9 to a 12 every day. Thank you Doctor... you are brilliant and caring... and you save lives.. literally Please go and see Dr Darrow.. You will not regret it.

Karla B.

March 11, 2026

So very grateful for the wonderful care and treatment I have received at Joint Rehab. Dr. Grove is passionate about his patients and his staff are incredible. I feel so much better after my treatments and I'm able to more comfortably do the things I love to do.

Ruth R.

February 23, 2026

I had stem cells in my knees by Dr Darrow some years ago and my Knees are still good. I walk well, I have even been hiking in the Alps. Before the treatment I had a stair lift at home (no stairlift now !) and walking was very difficult. I am immensely grateful , Dr Darrow is very knowledgable, professional, kind and caring and so is his staff. For me the treatment changed my life and I recommend highly to everybody.Ruth, London, UK

Michael D.

February 22, 2026

Just finished my second series of injections. What a difference. They added exosomes to the stem cells, which seems to have taken healing to another level. My lumbar problem has been with me for over a year. I can't walk more than 5-10 minutes before having to sit down. After my recent procedure, the pain is almost completely gone. It's a miracle! Great staff, very professional, and up to date with the latest scientific breakthroughs. I'm very grateful for my results.

Joanna C.

January 18, 2026

Mark darrow is the optiomy of efficiency, caring, kindness and everything he does works!!!! He is the best!!!!!

Diana L.

Excellent experience with Dr. Grove and his entire staff for PRP and stem cell treatment. All of my needs were met, and the care was thorough and professional. Dr. Grove is very personable and took the time to explain everything clearly. The front office staff was wonderful and welcoming and the RN assisting Dr. Grove was great as well. Highly recommend.

Cindy L.

January 9, 2026

Drs. Darrow and Grove and their office staff are wonderful. They both took the time to really explain things, listened to my concerns, made me and my mother both feel comfortable, and worked with us on the financial side of it. They are extremely knowledgeable in this field and truly believe in their process, which makes it easier to believe in it yourself and in their skill. I am about two weeks out from my initial injections into my hip, lower back, and knee. I do not have any relief from pain yet, but I did not expect to this early. I will do a follow-up review on how I'm feeling in a month. But whether stem cells work for me or not, I would still recommend them!

Amy L.

December 31, 2025

Dr Darrow and his staff are extremely caring. I had autologous stem cells for my knees a few years ago and found it helpful with pain after exercise. I came back today after a new knee injury and Dr Darrow aspirated a lot of joint fluid and injected stem cell from my bone marrow. I am once again impressed by the level of care I received. And it's always uplifting to talk with Dr Darrow, who is incredibly spiritual.

B E.

December 19, 2025

Dr. Darrow has been treating my various pain conditions for several years, helping me avoid multiple surgeries. Most recently, I suffered a rotator cuff tear in my right shoulder. Dr. Darrow treated my rotator cuff tear with PRP injections and I was able to avoid surgery. I am truly grateful for his skill and dedication.

Newport G.

December 15, 2025

Best decision I ever made, and wish we would have gone sooner! Both doctors, Dr. Darrow and Dr. Grove are exceptional as far as their knowledge AND skill. I've taken my daughter multiple times over several years and her relief has always been immediate, each time. Prolotherapy gave her a life, after she had been suffering over a year and there's nothing else out there like it. I do give her something to relax before, because it is quite a few injections in her neck (C spine) the problem area. She has hypermobility and no curve in her neck, and is 22 years old. The office staff and assistants are courteous and there's even a little cafe inside the building which is nice. I hope more people can find them because treating the spine to avoid surgery, who doesn't want that ?!!