Mild Silver Proteins contain silver in a bound, or compounded form, thereby leaving less available for desirable interaction within the body. Additionally, the only known forms of silver that accumulate in the tissues of the body are silver compounds. Silver proteins are not necessary for the body to receive the immune supportive benefits of silver. In fact, binding silver into protein compounds actually limits their supportive interaction within the body. Learn more about the various Types of Silver. We do not believe there is good reason to use MSP, since it typically contains much higher concentrations (50-500 PPM or more) of silver in bound forms.