Is this a safe choice if you are possibly insulin resistant yet not pre-diabetic, only taking Nature-thyroid for hypo-throidism, under control (a benign nodule removed half of thyroid, 20 years ago), Considering as about 20 pounds over weight and read this is good as a help with many aging issues.....(73 years and basically healthy). If OK to take, will this be something I may stop at a later date, or will this become a necessary drug to take indefinitely? This has been suggested as helpful by my integrative doctor.....Great blood pressure and cholesterol readings....