I will answer but you might search back through this subject, too. There has been quite a lot of discussion. As to the powder, I use an organic seed powder by Banyan Botanicals. Google it and you will find several sources. As to why I bake it, raw beans contain a toxin to discourage creatures from eating them. Kidney beans in particular can sicken. That's why people soak them overnight before cooking. I toast the powder before use in hopes of breaking down the toxin. I don't know if it works or not, but I have had no more problems with cramping. Finally, the "HP-200" is just a name, like a brand name. I don't know for sure but the HP-400 may be a typo.