David focuses his research on gastrointestinal health, clinical trials and chronic disease. Within these areas, he has concentrated on the effects of supplementations, gastrointestinal function and exercise on body composition, absorption/bioavailability (pharmacokinetics), liver and kidney disease, exercise recovery, inflammation, intestinal permeability, oxidative stress and biochemical analysis. David is currently conducting numerous clinical trials on natural supplements and has been an investigator on more than 12 published clinical trials. Clinical trials completed to date have included trials on body composition, appetite control, GIT health, inflammation, CKD, exercise and macula health. In addition to clinical trials, David has completed pharmacokinetic trials on vitamins B12, C, D & E, Coenzyme-Q10, alpha lipoic acid, glutathione, curcumin, fish oil, krill oil, lutein, saffron, fisetin, astaxanthin and palmitoylethanolamide.