About this item SMALL SILVER PARTICLES ARE MORE BIOAVAILABLE. Natural Path / Silver Wings Colloidal Silver 32 oz average silver particles range from 0.6nm ֠3nm. It is easily absorbed and readily available for your bodyҳ immune support needs. Silver Wings Colloidal Silver is safe, more bioavailable and effective for immune support than competing brands. 250 PPM - 32 ounce. AMBER COLOR IS KEY: Silver Wings is made from naturally occurring elemental Silver, which has a color. It is not ionic or electrically processed. The higher PPM, the darker the amber color colloidal silver suspension (liquid) will appear. GMP CERTIFIED & QUALIFIED 3RD PARTY INDEPENDENT LABORATORY VERIFICATION- Natural Path / Silver Wings manufacturing and distribution facility is UL cGMP certified and FDA inspected. Silver Wings verifies PPM, silver particle size, stability, pH, etc. at Qualified Independent Third Party Laboratories. Both UL and FDA review the in house testing and independent laboratory verification. SINCE 1994, NPSW has provided health food stores, practitioners and loyal customers the highest quality colloidal silver on the market. SEE THE SILVER WINGS DIFFERENCE FOR YOURSELF: Add to your cart today and discover the difference in pharmaceutical grade colloidal silver. WORLDғ COLLOIDAL SILVER EXPERTS: The oldest family-owned and operated colloidal silver manufacturer in the U.S. Awarded the 2021 Natural Choice Award for Best Immune Product.