Beta glucan is a soluble fiber nutrient commonly derived from the cell wall of baker’s yeast, cellulose of plants, some mushrooms ([[shiitake]] and [[maitake]]) and fungi, and from the bran of cereal grains.
==Special Precautions of Beta glucan==
Although beta-glucan is generally considered safe, there's some concern that it may lower blood sugar. Therefore, people with hypoglycemia (or anyone taking medications to reduce blood sugar) should consult a physician before using beta-glucan.