Added 9/4/2021
In rats study conducted in Sweden , Aug 6, 2021
"Neuroprotective effects of Coenzyme Q10 in Parkinson's model via a novel Q10/miR - 149-5p/MMPs pathway
pubmed.ncbi.nlm.nih.gov/343...
Summary & Opinion: Rat model that I believe was injected. miR-149-5p was used in the study. "Taking together miR-149 and CoQ10 has shown to have an impressive potential to prevent damage to dopaminergic neurons caused by 6-OHDA injection through reducing MMP-2,9, increased TH expression, and improved motor function." I do not understand it and therefore can not give an opinion.
Added 9/4/2021
amjmed.com/article/S0002-93...
In human study with 7 participants. (Thank you Park Bear for sharing this.)
My conclusion of this report: CoQ10 can help with Orthostatic Hypotention
jamanetwork.com/journals/ja...
Phase 2 Study was in 80 PWP with a placebo control group and lasted for I believe 8 months.
Phase 2 had a positive outcome but Phase 3 in 600 people did not. But the Phase 3 study did state, "One problem may be optimizing administration, and how to achieve this remains to be understood. For example, Ubiquinol, the reduced form of CoQ10 ....."
Preclinical looked consistently promising. Phase 2 did as well. Phase 3 although unsuccessful left some questions.
jamanetwork.com/journals/ja...
Quote from study:
"Significant methodological issues affect the interpretation of studies evaluating putative neuroprotective agents in early PD. The dopaminergic deficit is typically far advanced at the time of diagnosis, with upwards of 50% of the dopaminergic neurons lost and the fate of those remaining possibly already determined.26 The optimal time to initiate a disease-modifying therapy may be before the onset of motor symptoms. The window from diagnosis to need for symptomatic therapy is short, and a growing tendency to treat earlier could affect the ability to determine a positive benefit.27 In the CARE-HD (Coenzyme Q10 and Remacemide Evaluation in Huntington's Disease) study,28 for example, a possible benefit did not become apparent until after 2 years of treatment."
I'm not sure what to make of the above quote part of which is "The optimum time to initiate a disease-modifying therapy may be before the onset of motor symptoms." To me this implies that the research hypothesize that pre-parkinson's or prodromal PD may benefit from CoQ10. Interesting to note that in Huntington's Disease, a positive benefit was not apparent until after 2 years of treatment.
A small study in Japan in 2016 using Ubiquinol (Not CoQ10 like the phase 2 & 3 large studies above) I will summarize this study with, it does not slow disease progression but may ease off periods.
naturalmedicinejournal.com/...
It is my present conclusion that Ubiquinol is a potent anti-oxidant that can have general health benefits and is generally safe but appears to do little if anything for PWP but how it interacts with other interventions and if it can be beneficial when used in conjunction with other supplements is unknown but I believe quite possible. It is safe, a potent antioxidant, and it can help with Orthostatic Hypotension (dizziness, low blood pressure.)
Who is taking CoQ10 or the more bioavailable Ubiquinol?
I have been taking 600 mg.