Type 1, Type 2 and it's complications of retinopathy, nephropathy, neuropathy, and cardiovascular disease; MODY, LADA,  metabolic syndrome, insulin resistance, impaired glucose tolerance, impaired fasting glucose, reactive hypoglycemia and obesity.

Hyperthyroid, hypothyroid, thyroid nodules and cancers, thyroiditis, post partum thyroiditis, goiter, sick euthyroid syndrome, Grave's disease and ophthalmopathy, autoimmune thyroid disease, Hashimoto's disease, thyroid hormone resistance, multiple endocrine neoplasia, and thyroid replacement therapy.

Vitamin deficiencies and toxicities, bacterial overgrowth, complications of bariatric surgery, Celiac sprue, hyperhomocystinemia, obesity, eating disorders, and malnutrition.

Erectile dysfunction, hypogonadism, low testerone, decreased libido, muscle atrophy, galactorrhea, testosterone replacement therapy, and osteoporosis.