Growing in controlled, pure cultures along with strict testing standards, guarantees quality and safety. Both spirulina and chlorella are farmed in this manner. Some people claim it has a milder smell, grassier taste and is easier to blend in juices, than blue green algae. The degree of effectiveness differs from one person to another since the physiological needs are different. A little patience is required to determine which one is best for you.
Major benefits reported are higher energy, more stamina, less illness, and maybe even regularity.
Some people find they digest the green superfoods better or benefit more when they take the two types of algae together. Make your choice and if it doesn't set well, try another one. We are all unique in the way we metabolize our food. But, when pharmaceutical and other companies started marketing synthetic, isolated vitamins, the interest in grasses declined until the 1970s. Popularity is growing again as we realize that it is not always in our best interest to use pharmaceuticals or isolated synthetic vitamins.