I know this might not help anymore, but just really wanted to say this since I just read up on it. OldFishLady said NO to beefheart lol. A lot of people use this, and it is sold in package as a legit fish food, but I remember someone saying that it is packaged and sold only because of demand for them. Lots of debate over this too, but best thing is to try for yourself and see how that works. I honestly think this is not made for bettas/fish. It's beefheart, and I think it came from a cow? Lol. Some will tell you that you can use it, but use it sparingly lol. That has got to be the most tarded-tarded line evahhhhh. Use it sparingly? Why not just never use it? lol. If you have to use it sparingly!!? Doesn't that tell you something? Anyway, try it out and let us know how it goes. Not just OP, but anyone who is reading this and experimenting with beefheart. Sorry if I'm just babbling.