Drugs 29 , 11791185 (2020)
It all comes down to bioavailability - basically, how much of what you take actually makes it into your bloodstream
These preparations are not regulated like medicines and independent testing has found incorrect doses, contamination, different compounds
Water is always a good idea, too
389,390,391 Environmental toxins and neurodegenerative disorders Exposure to various types of environmental toxins including trace metals as just discussed, but also pesticides such as organophosphates, substances of abuse such as methamphetamine, organic solvents, air pollutants, and others are increasingly recognised as risk factors in neurodegenerative disorders such as PD and others