Nutritional yeast that is 100% nutritional yeast, and/or when listed as an ingredient, is Kosher for Pesach for all.
Some products labeled “nutritional yeast,” can contain other ingredients. Very seldom, if ever, is there Chametz in there, but give a quick check on those other ingredients, just to be certain.
Michael Cabasso 
Eli A 
Eileen Missry
Nutritional yeast that is 100% nutritional yeast, and/or when listed as an ingredient, is Kosher for Pesach for all.
Some products labeled “nutritional yeast,” can contain other ingredients. Very seldom, if ever, is there Chametz in there, but give a quick check on those other ingredients, just to be certain.