The most clear dietary contributor to osteoarthritis is caloric excess leading to obesity, making weight loss one of the first-line suggestions for treating knee and hip OA.[1] There’s weaker but suggestive evidence that increasing long-chain omega-3 fatty acid consumption by eating more fatty fish can also help, as could increasing vitamin K intake.[2]
How could diet affect osteoarthritis?
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•Last Updated: May 16, 2025
Diet can affect osteoarthritis primarily through caloric excess, which contributes to obesity, which makes weight loss a key treatment suggestion. Additionally, increasing the intake of long-chain omega-3 fatty acids from fatty fish and vitamin K intake may also provide benefits.