There are two types of nutritional yeast — unfortified and fortified.

• Unfortified: This type does not contain any added vitamins or minerals. It only contains the vitamins and minerals that are naturally produced by the yeast cells as they grow.
• Fortified: This type contains synthetic vitamins added during the manufacturing process to boost nutrient content. If vitamins have been added to the yeast, they will be included in the ingredients list.

Nutritional yeast is a very good source of B vitamins, except for B12, although this is often added to help combat deficiency in vegetarian and vegan diets. It also contains glutamates, but not monosodium glutamate (MSG).

How to Eat Nutritional Yeast

Cheese lovers will be happy to know that this powdery, crumbly substance can be used just about anywhere that you would normally use grated cheese. Here are just a few ways to eat nutritional yeast:

• Sprinkle it on top of popcorn with a dash of salt and your other favorite seasonings
• Add it to roasted or steamed vegetables
• Stir it into soups or stews
• Toss it into a salad in place of cheese
• Use it to create a vegan macaroni and cheese
• Mix it with rice for a flavor boost
• Stir it into your favorite risotto

Source :

https://www.healthline.com/nutrition/nutritional-yeast#TOC_TITLE_HDR_2

https://www.webmd.com/diet/nutritional-yeast-good-for-you#1

https://www.bbcgoodfood.com/glossary/nutritional-yeast-glossary

https://www.openfit.com/what-exactly-is-nutritional-yeast-and-how-do-you-cook-with-it