I found these meta-reviews and thought some here might be interested. Looks like for CoQ10, the dose makes the poison… The optimum seems to be around 100-200 mg/day: but is it the same for all people? Does it depend on your gender? weight? race? How do you make sure you don’t take too much?
On the other hand, this other recent meta-analysis concluded that the optimal daily dose was 300–400 mg CoQ10 for “inhibition of inflammatory factors”. So there might be a trade-off here… Efficacy and Optimal Dose of Coenzyme Q10 Supplementation on Inflammation-Related Biomarkers: A GRADE-Assessed Systematic Review and Updated Meta-Analysis of Randomized Controlled Trials 2023