alchemypet's Immunity booster for dogs 2500mg has more potent strength to align with a reasonable dosing regimen for bigger dog breeds (over 45lbs). It is made from organically grown, full-spectrum Agaricus Blazei Murill Mushrooms, free from harmful chemicals and allergy-triggering ingredients and supports the immune system for optimized longevity. AbM mushroom has been considered a superfood for a long time and is widely regarded as one of the most powerful medicinal mushroom on the planet.