Actually the cyanobacteria blue-green algae were the first living organisms dating back 3.5 billions years. Life on earth originated from blue-green algae; they invented cellular split and cellular hormones. Their membranes secrete hormones in order to communicate with neighboring cells.
Phytoplankton are one link up the food chain as they consume microalgae to live. Microalgae are the first link, then comes phytoplankton, crustaceans, small fish, big fish, animals and human. The microalgae in BAC are the densest food that also carry the least toxicity. As you travel up the food chain you begin to lose nutrient density and gain toxicity. A good example of progressive loss of density is with the red pigment astaxanthin of which the red microalgae hoemetacoccus pluvialis is its largest carrier on earth. From there you find astaxanthin in declining amounts in phytoplankton, krill, lobster, etc.
Bio-Algae Concentrates are a blend of blue-green and red algae that carry the highest antioxidant power naturally occurring from their mixed carotenoids. The ORAC value (free radical quenching and antioxidative power) of some of its alpha-carotene and astaxanthin is clinically proven to be near 1000 times more than that of vitamin E, 500 times more than vitamin C and 20 times more than beta-carotene as found in carrots.