Yeast flakes (nutritional yeast) are known in English as “nutritional yeast”.
Health effects of yeast flakes
The glutamic acid contained specifically in yeast has a very strong effect irritating to the intestinal mucosa and can therefore contribute to intestinal diseases such as irritable bowel syndrome or celiac disease. This also applies to the purest form of nutritional yeast. The human body sees nutritional yeast or nutritional yeast as an unproductive invader and so every time you take nutritional yeast or nutritional yeast you are putting your weight on it Immune system under stress out of (Revised and Expanded Edition (p.255) Kindle version).
Glutamic acid also works irritating to the central nervous system, as it can attach itself to neurons and thus cause problems.
B12 in nutritional yeast flakes?
Some people claim that yeast flakes are a good source of Vitamin B12 are. However, the truth is that yeast flakes are not naturally rich in B12, but B12 is added to the yeast after the fact. The B12 used is usually of very low quality.
Conclusion
Nutritional yeast or nutritional yeast should not be considered a beneficial food. Especially people who already suffer from health problems should strictly avoid nutritional yeast whenever possible. This is for symptom-free people economical Using nutritional yeast as a flavor enhancer is an option.