I have moderately severe degenerative joint disease in my cervical and lumbar spine. I started taking SierraSil in 2003 and took it daily for 5 years with great results – improved function and reduced aches. In 2010, I stopped taking SierraSil and my aches and loss of function returned. I started back on SierraSil and the relief was fantastic after 3 days. I take SierraSil every morning and even with a worsening condition since an automobile accident in February 2016, I still have minimal aches and excellent mobility in my knees and back.