Contains 290 kcal per 100g. Spirulina is a natural salt-water plant, and is consumed as a dried dietary supplement. It contains all of the essential amino acids and is rich in ‘good’ fats. It is also a very good source of Magnesium, Potassium, Pantothenic acid and vitamin K. Pregnant women and infants should not consume Spirulina due to the possibility of water pollution accumulating in Spirulina.