Is there gluten in yeast?

No, there is not inherently gluten in yeast. Yeast, a single-celled fungi used for leavening baked goods and fermenting alcoholic beverages, does not contain gluten. However, be aware that certain kinds of yeast, like brewer’s yeast which is a by-product of beer making, can be contaminated by other ingredients that contain gluten. Always check product labels if you are seeking to maintain a strictly gluten-free diet.