Now suppose that light in the yellow range of wavelengths (approximately 577 nm to 597 nm) enters the eye and strikes the retina. Light with these wavelengths would activate both the green and the red cones of the retina.
Brewer's yeast. Uses. Brewer's yeast is traditionally used as a source of vitamin B, selenium, and chromium, especially by vegetarians. Clinical trials have evaluated yeast for a role in immunomodulation, respiratory infections, prevention of postsurgical infections (as beta-glucan), and as a source of dietary fiber to improve the lipid profile.
Gastrointestinal Effects. Brewer's yeast is sometimes used to treat diarrhea and constipation. It can have a similar water-binding effect to fiber. The more common side effects of supplementing with brewer's yeast are those of a gastrointestinal nature, such as gas, flatulence and a laxative effect.rewer's yeast can have adverse effects as well as beneficial ones. You can use brewer's yeast, the type used to make beer, not bread, as a nutritional supplement.