BRM4 is a proprietary immune support complex from Daiwa Health Development and has been shown in clinical studies to support the immune system.

The active ingredient in BRM4 is Rice Bran Arabinoxylan Compound (RBAC), a polysaccharide dietary fiber derived from rice bran, modified by an enzyme from Shiitake mushrooms. BRM4 is an immune supporter, shown to be safe with no harmful side effects.