Andrographis paniculata is a bitter-tasting herb with a long history in traditional medicine. People most often reach for it right when they feel a cold starting, aiming to reinforce the body's defenses. Some also use it for ongoing immune upkeep.
Most supplements standardize the extract to its active markers, the andrographolides. Absorption can differ widely from one product to the next. Splitting the dose into several servings per day and taking them with food helps reduce the chance of stomach upset.
Pay close attention to the cautions. In rare instances, this herb has been linked to liver problems. Do not combine it with drugs that suppress the immune system, thin the blood, or lower blood sugar. Steer clear if you have an autoimmune condition, or if you are pregnant or breastfeeding.