By Dr. Jeffrey Peng, MD · Published March 5, 2026 · 7 min read Watch the Full Video Vitamin D is widely recognized for its role in bone health, but could it also help with arthritis symptoms? As a sports medicine physician, I frequently field questions from patients with knee osteoarthritis about which supplements are worth trying. Vitamin D is one of the most popular — and the research behind it is worth understanding before you start supplementing. In this article, I revi

Written by Dr. Jeffrey Peng, MD — Board-Certified Sports Medicine Physician Published: March 1, 2026 | Last Updated: March 1, 2026 Knee arthritis is one of the most common conditions I treat in my sports medicine practice, and one of the most frustrating things patients experience is how unpredictable it can be. Two patients with nearly identical X-rays can have completely different levels of pain, function, and long-term outcomes. For years, we've treated osteoarthritis wit