You are the gem; I am a retired surgical pathologist gem -feeding patients to oncology specialists before I retired. I believe strongly in the power of supplements- from fisetin to berberine and beyond. Physicians are not taught that aging is a disease; we are taught the disease of aging. And, IMO, there is a big-pharma-induced anti-supplement bias. Yet the NLM is replete with reports of good outcomes with supplements. Vitamin levels should be routinely available, esp. for D3 which is correlated with lifespan.Supplements have little value without lifestyle changes. IMO, your approach is the correct one. The brohaha over the study is a medical version of "if it bleeds,it leads". I think we would enjoy an email dialogue -you are busier than I am as a certified but very active (learning Chinese to communicate with my mainland fiancee, exercise, diet, ad nauseiim) old fart retiree in the beautiful state of Maine.
Yours with admiration,