GEVA Supershake F Series contains Spirulina which in turn contains 20 to 25 times more beta-carotene (which is a source of vitamin A), than carrots. Beta-carotene is an anti-cancer substance and several researches have revealed that taking beta-carotene can help protect against chemical substances causing malignant tumors, as well as defend against chromosomal changes that causes cancer and also enhances the immune system.