Bromelain is a mix of enzymes taken from pineapple stems. People use it to help break down protein during meals. They also take it between meals to ease swelling and soreness from things like joint aches, sinus pressure, or post-surgery recovery.
Take bromelain with food when you want digestive help. For the anti-swelling effect, take it on an empty stomach. Doses differ by form and purpose, so check the product label.
Be careful if you take blood thinners or other supplements that slow clotting because bromelain can raise the risk of bleeding. Avoid it if you are allergic to pineapple. Stop taking it before any planned surgery.