Fruits containing very high (greater than 1mg) in salicylic acid include blueberries, blackberries, raisins, dates, guava and apricots. Fruits with a relatively high amount of salicylic acid (between 1/2mg and 1mg) include fresh avocados, cherries, red grapes, fresh mandarin and tangelos, and Granny Smith apples.
Many vegetables are plants that naturally contain salicylic acid. Those containing the largest amounts are green peppers, olives, mushrooms, tomatoes, radishes and chicory. Broccoli, cucumber, spinach, fava beans, sweet potatoes and alfalfa sprout also contain a high amount of salicylic acid.
Almonds are the only nut containing at least 1mg salicylic acid. Peanuts also contain over a milligram per serving but are not technically a nut (they are a bean). Pine nuts, pistachios and macadamia nuts contain a relatively high amount (between 1/2mg and 1mg per serving).
Herbs and Seasonings
Seasonings can often contain high amounts of salicylic acid. Canella, dry dill, oregano, hot paprika, rosemary, thyme, turmeric, mustard, curry and vegemite are good sources of the acid.