SerraGold delivers serrapeptase, a systemic proteolytic enzyme people use to support a normal inflammatory response and help thin and clear excess mucus, which is especially useful during sinus congestion or after overexertion. Take it on an empty stomach so it works throughout the body rather than just digesting your last meal. Don't take it if you're on blood thinners without checking with your doctor first, since serrapeptase can affect clotting.