Its harder to tease out because the data is a little noisier, but it appears the glucose reduction was also not quite at a plateau, suggesting further improvements may be forthcoming in longer term trials, especially if other anti-diabetic medications are on board
[1] [2] [3] [20] NAD+ supplementation could prevent mitochondrial deterioration and preserve metabolic function/energy (ATP) generation by balancing age-related degradation of NAD+ and its precursor nicotinamide mononucleotide via NADases, particularly CD38
Clinical trials showed 15 to 24% body weight loss over one year
Pre-mixed solutions are more convenient but may have a shorter shelf life and higher prices
(PubMed) Topical glutathione (creams / lotions / soaps) acts locally on the skin, minimal systemic absorption, lower risk
Take, for example, their cult-favorite Zero Pore Pad