15 ppm Colloidal Silver — 500ml Bottle, Enhanced Concentration

The more concentrated version for intensive or topical use with Bio Colloïdal 15 ppm Colloidal Silver: 500ml of pure 15 ppm (15 micrograms/ml) colloidal silver solution in ultra-pure distilled water. The composition is strictly identical to the 10 ppm version but with a 50% higher concentration. No additives, no silver proteins, no silver salts.

What is the difference between 10 ppm and 15 ppm?

The concentration in ppm (parts per million) indicates the amount of metallic silver per liter of solution: 15 ppm = 15 mg of silver per liter, which is 50% more than at 10 ppm. Some users prefer the 15 ppm concentration for topical applications or for shorter courses of use. The composition remains the same—only the density of silver particles varies. The 500ml size offers a good balance between volume and convenience.

Common uses

• Topical use: local application on the skin for skin hygiene.
• Oral and throat spray: as a gargle or direct application to oral mucous membranes.
• Short-term courses: some users opt for the 15 ppm concentration for shorter periods of use.
• Intermediate family size: 500ml for regular use without reaching the large 1L format.

Composition

No additives, no silver proteins, no silver nitrate, no preservatives. 500ml bottle.

Who is this product for?

• People wanting a higher concentration than 10 ppm for topical uses
• People preferring an intermediate size between the 250ml spray and the large 1L format
• Regular users looking for a compromise between volume and concentration

Important precautions

• Argyria: excessive and prolonged consumption can cause permanent grey discoloration of the skin. This risk increases with concentration — strictly observe recommended usage at 15 ppm.
• Drug interactions: may reduce the absorption of certain antibiotics (tetracyclines, quinolones) and thyroxine — do not use simultaneously without medical advice.
• Pregnant or breastfeeding women: not recommended as a precaution.
• Children: use with caution and under adult supervision.
• Do not use as a substitute for prescribed medical treatment. In case of doubt, consult a physician.

See our range: Discover Bio Colloïdal products

To learn more: Read the article Colloidal silver — Benefits and safe usage