The checklist

1. Two ingredients

Look for purified (deionised or distilled) water and silver, and nothing else. Added salt, protein, gelatin or stabilisers make a different product. See colloidal vs ionic silver.

2. A measured concentration

The label should state a concentration in ppm, and the maker should be able to tell you how they measure it. A consistent, measured figure is more useful than a big number. See what ppm means.

3. Dark glass

Violet or amber glass protects the solution from light. Plastic bottles and clear glass don't. See how to store colloidal silver.

4. A batch number and date

Traceability means you know when your bottle was made and the maker can trace any problem back to a batch.

5. A real maker

Can you email them and get a straight answer about their water, silver purity and method? Small producers usually can.

Red flags

  • Medical or “miracle” claims. Colloidal silver isn't a licensed medicine in the UK, so claims that it treats or prevents illness aren't allowed. A seller making them is ignoring the rules.
  • Cloudy, grey or very dark liquid, or sediment in the bottle.
  • No ingredients list, ppm or batch information.
  • Very high ppm figures with no explanation of how they were measured.
  • Plastic packaging for long-term storage.

How we measure up

We make our colloidal silver to meet every point on this list: deionised water and 99.99% fine silver only, 10ppm measured every batch, violet glass, and a batch number and date on every label. See the range or ask us anything.