About 9% of the total dry weight is composed of the essential minerals; around 15% is in hydrocarbons. About 6 1/2% is composed of lipids, including 2.6% of the omega-3 and omega-6 non-saturated essential fatty acids (and this is very high); plus an average of 0.17% of beta-carotene (very, very high) and the B vitamins including 4 micrograms of non-analog vitamin B12 in each 10-gram daiIy dose of Spirulina ..the required daily dose of B12 for adults.