Research shows Lion's Mane Mushroom (Hericium Erinaceus) may help support your dog’s mental and neurological health, which is so good for our senior dogs. This is a powerful full-spectrum mushroom extract.With organic traditional cultivation, you can be sure that the mushrooms are full of phytonutrients and beta-glucans.Note: Your dog only needs a tiny amount. This jar size reflects that. 40g in a recyclable glass jar