<<Disclaimer: Verify this information before applying it to your situation.>> Dear List, I have used Red Star nutritional yeast for many years as a source of B vitamins. It always boosts my energy considerably after I have taken it several days in a row. I take quite a lot: 3 T. a day. I know some people do not tolerate yeast, and this is not the greatest taste-treat, but it might be worth a try for some people who are desperate for energy, as I often am. I recently e-mailed Red Star to be sure that it is still gf, and I received this reply: Thank you for your interest in Red Star Nutritional yeast. The products that we produce as nutritional yeast are all "gluten" free. Absolutely no wheat gluten is used in the fermentation or down stream production of the nutritional products. Richard Wine Business Development Manager & Nutritional Red Star Yeast & Products Leslie in Calif.