Amazon is offering Aurganic Spirulina Powder 100% Organic 100 gm at Rs.319. Protein Powder, Diet Supplement. Spirulina being a rich source of antioxidants, slows down the ageing process by fighting free radicals. Free radicals are bio-chemical elements that are known to be responsible for diseases like cataract, arthritis, atherosclerosis, diabetes,excessive stress and fatigue, even cancer. It’s a Natural “algae” powder that is incredible high in protein and nutrients.