Gluten is a protein found in wheat, rye, and barley. People with celiac disease cannot tolerate gluten. Some oats are cross-contaminated with gluten during processing and may not be appropriate for people with celiac disease.

In the seven days of refined and whole grains you recorded, the gluten-free grains include white rice, brown rice, quinoa, and popcorn.

Which of the gluten-free grains contains the highest number of grams of fiber plus grams of protein per serving?

a) Brown rice
b) Quinoa
c) Popcorn
d) White rice

Of the gluten-free grains listed, quinoa normally has the highest amount of fiber and protein per serving, making it the correct answer among the given options.

Explanation:

The question pertains to identifying which gluten-free grain among white rice, brown rice, quinoa, and popcorn contains the highest combined amount of fiber and protein per serving. To answer this, one would need to compare the nutritional content of each grain. Typically, quinoa stands out as a grain that is high in both protein and fiber. While white rice is low in fiber, brown rice offers a moderate amount of both nutrients. Popcorn, when air-popped and without added butter or salt, can also be a good source of fiber. Nevertheless, quinoa usually has higher levels of both fiber and protein, in comparison to the other options listed. Hence, option b) Quinoa is the correct answer.