Because the knee is a weight-bearing joint involved in all many types of movement, it is susceptible to injury and wear-and-tear. The knee joint contains three bony structures: the femur, the tibia and the kneecap. The ends of each of these bones are covered in cartilage, and the spaces between the bones are filled with synovial fluid. Inflammation of the cartilage and synovial fluid leads to a loss of lubrication in the joint, according to research published in the Arthritis & Rheumatism journal. The result is arthritis. Unfortunately, there is not a single "magic" diet that cures arthritis. However, dietary changes are one of the easiest and cheapest ways to reduce inflammation and increase the lubrication of the knees.
Omega-3 Fatty Acids
Omega-3 fatty acids, a type of polyunsaturated fat, have anti-inflammatory properties because they inhibit the production of cartilage-eroding compounds, according to nutrition expert Joy Bauer. Include foods high in omega-3 fatty acids such as eggs, flaxseed, walnuts and coldwater fish like salmon and tuna.
Vitamin C helps keep your collagen healthy, which in turn keeps your cartilage healthy. As an antioxidant, vitamin C also reduces the effects of the free radicals responsible for inflammation. Vitamin C-rich foods include citrus fruits, brussel sprouts, kale, sweet peppers and strawberries.
Don't let this name scare you. Beta-cryptoxanthin is simply a type A carotenoid such as the more familiar beta-carotene. Your body can convert it to vitamin A. Some research indicates this compound significantly reduces the chance of developing inflammatory arthritis. Good food sources of beta-cryptoxanthin are apricots, corn, oranges, papaya, pumpkin, red pepper, tangerines and winter squash. Because your body absorbs carotenoids better when you eat them with fat, include healthy sources of fat such as fish and olive oil with your beta-cryptoxanthin.
Quercetin is an antioxidant with strong anti-inflammatory effects. In fact, quercetin's effects mimic those of aspirin and ibuprofen in reducing inflammation. To get more quercetin in your diet, include apricots, blueberries, broccoli, cocoa powder, citrus fruits, olive oil and onions.