Synergy Natural - Org Spirulina (100 Tablets) Spirulina is a quantum leap beyond ordinary nutritional supplements as it contains the richest and most complete souce of nutrients found in any single food on the planet. Spirulina is a blue-green micro algae that grows naturally in mineral rich lakes. It boosts energy, strengthens the immune system, improves skin tone, hair and nail growth and provides every-day, high-level nutrition with almost no calories. It satisfies hunger, reduces craving and supports both vegetatian and vegan diets. Spirulina is rich in calcium, magnesium and other trace minerals. In fact it supplies more calcium gram for gram than milk. Low in iodine and sodium, it is safe for those on salt-restricted diets.