Raw, unpasteurized, organic sauerkraut cleared up my sinuses -finally!! After many, many years of stuffiness and suffering. You buy this kind of sauerkraut at a health food store or a farm - NOT at a supermarket - that's the processed kind and you don't want that! Start out just taking a teaspoon, then a few days later add another teaspoon, keep going until you find the right dose that clears you. If you take too much all of a sudden, you may get stuffy - that's a detox reaction. Try and gauge what the right amount is for you and stay on that amount for a while before you raise it. Raw, unpasteurized sauerkraut kills yeast and fungus, which is usually the culprit in long term sinus issues.