Protein[edit]
Dried spirulina contains about 60% (51–71%) protein.[2][3] It is a complete protein containing all essential amino acids, with slightly lower amounts of methionine, cysteine, and lysine compared to certain animal-derived products.[4] From a nutritional point of view, spirulina is no better than other protein sources, but is more expensive gram-for-gram and may have adverse interactions when taken with prescribed drugs.[5]