23 ppm Ultra-fine Dispersion Dietary Supplement Immune Support Argentyn 23 Professional Bio-Active Silver Hydrosol delivers advantages no other manufacturer can match: Actively Charged: >98% positively charged silver ions and nanoclusters. Easily Absorbed: Unprecedented particle size of 0.8 nanometers allows for easy absorption and excretion. Less is More: Ultra-small particle size results in greater surface area, making our low concentration of 23 ppm more effective than brands up to 1000 ppm. Perfectly Safe: Safe for the whole family.