Spirulina contains about 60% complete protein containing all essential amino acids, though with reduced amounts of methionine, cysteine and lysine when compared to the proteins of meat, eggs and milk. It is, however, superior to typical plant protein, such as that from legumes.
Spirulina's fat content is rich in gamma-linolenic acid (GLA), and also provides alpha-linolenic acid (ALA), linoleic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA). Spirulina contains vitamins B1 (thiamine), B2 (riboflavin), B3 (nicotinamide), B6 (pyridoxine), B9 (folic acid), and vitamin E.
Spirulina is also a source of potassium, calcium, chromium, copper, iron, magnesium, manganese, phosphorus, selenium, sodium and zinc