Foods containing omega-3 fatty acids have blood-thinning properties. These foods include salmon, anchovies, lake trout and albacore tuna, according to New Health Guide. Other foods with blood-thinning properties include olive oil, red wine, oregano and dill.
Garlic also helps thin the blood, according to Natural News. It also has powerful antiviral and anti-inflammatory properties. While eating raw or cooked garlic are the most effective ways to take advantage of its health benefits, it can also be taken in supplement form. Garlic supplements are tolerated better in those who suffer from stomach upset from eating raw garlic or for people who prefer to avoid garlic's strong odor. Foods rich in salicylates also have strong blood-thinning capabilities. Salicylates are the active ingredients in aspirin, which is commonly recommended by physicians to thin the blood in an effort to reduce the risk of heart attack, blood clots and stroke.
Foods rich in salicylates include raisins, cherries, cranberries, strawberries, oranges and tangerines, according to Sandy Simmons' Connective Tissue Disorder Site. Other substances high in salicylates include honey, chewing gum, vinegar, peppermints and cider. People taking prescription anticoagulants like warfarin should avoid foods that have blood-thinning properties like garlic, according to Medscape. This can result in dangerous abnormal bleeding and platelet abnormalities.