The reference dose, published by the United States Environmental Protection Agency in 1991, which recommends the estimated daily exposure which is unlikely to incur an appreciable risk of deleterious effects during a lifetime, is 5 µg / kg / d ; meaning 5 microgram of silver per kilogram of weight per person each day – about 1 litre of 10 ppm colloidal silver per month for a 66 kg person.

The reference dose, published by the United States Environmental Protection Agency in 1991, which recommends the estimated daily exposure that is unlikely to incur an appreciable risk of deleterious effects during a lifetime, is 5 µg / kg / d ; meaning 5 micrograms of silver per kilo of weight per person each day – about 1 liter of 10 ppm colloidal silver per month for a 66 kg person.

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