Why Bio-Active Silver Hydrosol? Sovereign Silver's tiny particle size yields greater surface area and higher efficiency, making their 10 PPM product more effective than competing brands containing up to 500 PPM. Even if taken 7 times a day for 70 years, Sovereign Silver still falls below the EPA's daily oral reference dose (rfd) for silver. It does not contain added salts or proteins that render other silver products less effective. Plus, it is packaged in non-leaching glass bottles, never plastic. Effective if silver is not positively charged, it is not bio-active. The smaller the particle size, the more bio-active the silver and the easier it is for the body to absorb and eliminate. sovereign silver features an unprecedented particle size as small as 0.8 nanometers, resulting in a formula that contains greater than 98% bio-active silver ions and silver nanoclusters, making it exponentially more powerful than other brands. most other brands contain as little as 10% positively charged silver.