What is osteoarthritis?What are the main signs and symptoms of osteoarthritis?How is osteoarthritis diagnosed?What are some of the main medical treatments for osteoarthritis?Have any supplements been studied for osteoarthritis?How could diet affect osteoarthritis?Are there any other treatments for osteoarthritis?What causes osteoarthritis?What’s the difference between osteoarthritis and rheumatoid arthritis?What’s the difference between osteoarthritis and osteoporosis?Does running or resistance training cause osteoarthritis?Does joint damage on imaging show how much osteoarthritis can affect physical function?