Below is a 3 month study that says 300 mg of Coenzyme Q10 is enough to provides the same plasma levels as 1200 mg. Note the study was for 3 months and it determined there was no apparent symptom relief. Also nothing was said about neuroprotection for Q10.
So, save your money and only take 300 mg of Q10?
ashley
http://www.ncbi.nlm.nih.gov/sites/en..._uids=17502459
CONCLUSIONS: Nanoparticular CoQ(10) at a dosage of 300 mg/d is safe and well tolerated and leads to plasma levels similar to 1200 mg/d of standard formulations. Add-on CoQ(10) does not display symptomatic effects in midstage Parkinson disease.