What fermentation products are made by both yeast and humans?

Which product of fermentation is made by both humans and yeast?
a. Ethanol
b. CO2
c. NAD+
d. NADH

In humans, lactic acid fermentation happens resulting in lactate, while the product of yeast fermentation is ethanol. For both, there is a regeneration of NAD+...so my guess is C. But if you take a "hangover" and Auto-Brewery syndrome, don't both yeast and humans both make ethanol as well?

So, I'm torn between C and E. Anyone care to help?

To determine which fermentation products are made by both yeast and humans, let's break down the options:

a. Ethanol: Yes, both yeast and humans produce ethanol through fermentation. Yeast carry out ethanol fermentation, converting sugars into ethanol and carbon dioxide. Similarly, humans can also produce ethanol via a process known as endogenous ethanol fermentation, which occurs in certain conditions like "Auto-Brewery Syndrome."

b. CO2: Both yeast and humans produce carbon dioxide during fermentation. Yeast release carbon dioxide as a byproduct of their metabolic process. In humans, carbon dioxide is generated through various metabolic pathways, including during the fermentation of sugars.

c. NAD+: NAD+ is not a fermentation product; it is a coenzyme that participates in cellular respiration and fermentation. Both yeast and humans regenerate NAD+ during fermentation, but it is not the final product.

d. NADH: Similar to NAD+, NADH is not a fermentation product but rather an intermediate molecule involved in cellular respiration. It is not the final product of fermentation.

Based on the given options, the correct answer regarding fermentation products made by both yeast and humans is a. Ethanol. Both yeast and certain conditions in humans can lead to the production of ethanol through fermentation.