SierraSil is a naturally-occurring mineral complex comprised of many trace minerals some of which include: calcium, magnesium, iron, manganese, copper, zinc, selenium, chromium, molybdenum and phosphorous. Some of the minerals in SierraSil are set in a clay foundation and are unabsorbable by the body. As they pass through the system they attract toxins, heavy metals, viruses and bacteria which are soaked up in the porous surface and eliminated from the body. SierraSil has been shown to have a chelating effect. Try Joint Formula 14 SierraSil Today!