Spirulina is a nutrient-dense, blue-green algae that has gained popularity as a superfood due to its impressive health benefits. It grows in both fresh and saltwater and has been consumed for centuries by various cultures. Rich in protein, vitamins, minerals, and antioxidants, spirulina is considered one of the most nutrient-packed foods available. It contains essential amino acids, iron, B vitamins (especially B12), vitamin K, and magnesium, along with chlorophyll and carotenoids.