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.