While the flowers are high in flavonoids, the primary constituents in meadowsweet are the salicylates, including salicin, salicylaldehyde, and methyl salicylate.¹ In the digestive tract, these compounds are oxidized into salicylic acid, a substance that is closely related to aspirin (acetylsalicylic acid). While not as potent as willow, which has a higher salicin content, the salicylates in meadowsweet may give it a mild anti-inflammatory effect and ability to reduce fevers during a cold or flu. However, this role is only based on historical use and knowledge of the chemistry of meadowsweet’s constituents, and to date, no human trials have examined the therapeutic potential of meadowsweet.