A green, single-celled organism called Chlamydomonas reinhardtii has served as a model species for topics spanning algae-based biofuels to plant evolution. While algae have been used as dietary nutraceuticals that provide beneficial oils, vitamins, proteins, carbohydrates and antioxidants, the benefits of consuming C. reinhardtii were previously unexplored. Researchers have now completed the first study in humans demonstrating that C. reinhardtii helps improve human gastrointestinal problems related to irritable bowel syndrome, including diarrhea, gas and bloating.