Based on current production figures, an acre of spirulina can produce twenty times more protein than an acre of soybeans, suggesting that spirulina boasts the highest photosynthetic efficiency of any known plant. Perhaps that explains spirulina's extraordinary ability to produce the richest supply of nutrients known to man.
Spirulina is 65% protein - spirulina is higher in protein than nearly any other food. Compare spirulina at 65% versus eggs (45%), brewer's yeast (45%), soybeans (40%), dried milk (35%), and beef (17%).
Spirulina is rich in vitamins and minerals. It contains the entire B-complex group of vitamins. Previously, substantial amounts of B-12 were thought to occur only in animal sources. However, spirulina contains twice the Vitamin B-12 of liver. As a naturally occurring source of B Vitamins, spirulina could replace the current need for synthetic B Vitamins. The main pigment in spirulina is beta carotene, which, when absorbed by the body, is converted to Vitamin A. Two grams of spirulina provides more than 100% of the RDI of Vitamin A. Spirulina contains calcium, iron, phosphorus, potassium, zinc, and many trace elements.
Spirulina is a natural appetite suppressant. In the U.S. more and more people are successfully using spirulina to lose weight. Spirulina contains the amino acid phenylalanine, thought by scientists to act directly on the appetite center of the brain.