Dale F. - Chatfield, MN*
AfewyearsagoIstartedtakingSierraSilformyknees. Within a few weeks I noticed a difference. Sorry to say, life got in the way and I stopped taking SierraSil for about 6 months. My knees cracked again. I am taking SierraSil again and have learned a valuable lesson. Don't stop SierraSil.