Dr. Gary Fettke shares clinical observations on nutrition and joint pain, with context on the separate evidence for GLP-1 medications and osteoarthritis.
Original LowCarbMD air date: December 7, 2020. Interview guest: Dr. Gary Fettke.
Updated October 1, 2026, with a short excerpt and a link to our newer research article.
Knee pain can change how you walk, exercise, sleep, and live your day. Weight on the joint is part of the story, but it is not the only question worth asking. In this short excerpt, orthopedic surgeon Dr. Gary Fettke tells Dr. Tro what he has observed when people with hip or knee osteoarthritis change how they eat.
Dr. Fettke is a Tasmanian orthopedic surgeon. His clinical experience with joint disease gives this conversation a practical starting point: pain and function matter to the person living with osteoarthritis, even before a scale changes.
What the interview adds
Dr. Fettke describes people reporting relief from joint pain after a low-carbohydrate dietary change, sometimes before substantial weight loss. This is his account from the 2020 interview. It is about nutrition and joint symptoms; he is not discussing the later semaglutide osteoarthritis trials.
Read the newer research
In our 2026 research update, a separate question is getting attention: can GLP-1 medications improve osteoarthritis pain, and is any benefit independent of weight loss? In Can GLP-1 Medications Help Osteoarthritis Beyond Weight Loss?, Dr. Tro reviews the human trials, observational findings, and newer laboratory work. The article explains what has been shown for knee pain and what remains uncertain about a direct effect on the joint.
If you are living with osteoarthritis, the interview offers one clinician's perspective on diet and symptoms. The related article provides a separate look at medication evidence. Neither replaces an individualized discussion with your treating clinician about pain, movement, treatment choices, and your goals.
