Haematococcus pluvialis is a tiny green algae that produces astaxanthin, a powerful natural antioxidant that gives it a bright red color when stressed. Beyond astaxanthin, this microalga is rich in proteins, healthy fats, and vitamins, making it useful for creating functional foods and supplements. Researchers are developing better ways to grow this algae and extract its beneficial compounds using environmentally friendly methods, with potential applications in foods ranging from beverages to meat alternatives.