I have taken this supplement since 2008 because of illnesses caused by toxins in office environment and the building (3,000 employees). The ceiling air ducts were circulating black mold/spores that caused dizziness, digestive issues, brain fogging and breathing issues. Within 30 days of taking supplement there were improvements in all areas of functionality. After 5 years of usage, doctor recommended continuing treatment/supplements throughout my life (endless toxins all around us).