For the millions of aging men who quietly navigate the daily indignities of an enlarged prostate, relief has long meant choosing between imperfect pharmaceuticals or learning to endure. An Australian clinical trial now suggests that fucoidan — a compound drawn from brown seaweed — may offer something the natural world has rarely provided: a plant-based remedy that holds up under rigorous scientific scrutiny. The findings invite us to consider how often healing has been waiting, unexamined, in the margins of the natural world.