Immune Recharging Mushroom Blend. Plus Astragalus Root Extract. NOW Immune Renew has been specifically formulated to support the immune system with standardized Astragalus Extract and a specialized Mushroom Blend. Our specialized blend of eight mushrooms has been optimized for the characteristic mushroom polysaccharides known as Beta-Glucans. Mushroom Beta-Glucans have been long respected and scientifically studied for their immune system supporting properties. Astragalus has been included to complement our Mushroom Blend due to its ability to support a healthy immune system response. NOW Immune Renew delivers the natural nutrient profile found in Genuine Whole Foods. Natural color variation may occur in this product.