Bio-Algae Concentrates are a relatively new product and unlike plain algae, such as spirulina and chorella, are not commonly available on the Internet or in vitamin stores.
Because of the advanced technologies involved and the proprietary aspects of the exact blends of algae utilized, I recommend that you ensure that you are buying from a legitimate distributor or health professional.
A relatively good way to find one is to search for resellers of Bio-Algae Concentrates (BAC) on the internet.