This is a premium product. Each capsule contains both spirulina and chlorella making it a more convenient way of taking these healthy supplements. I don't get sick very often and attribute this to taking spirulina and chlorella over the years. I used to get ill at the change of every season and picked up colds and flu once or twice a year. I can honestly say that on the rare occasion that I do get a cold I get over it very quickly. This is the first time I have tried this product and so far so good.