So normally, buffers contain equal amounts of conjugate acid as conjugate base. For example, in this buffer system, we have the same amount of acetic acid as the acetate ion. Now, some exceptions do exist. For example, our blood, our blood has much more conjugate base than conjugate acid. But that's because our body produces many more acidic byproducts than basic byproducts. And so we need more base to neutralize our acid.