Hormones and the skin go hand-in-hand, so to speak. Problem skin, premature wrinkles, and inflammation are mediatd by hormones. This is a saliva and capillary finger-tip blood test, again at home. This looks at the larger array of hormones affecting skin vitality, including thyroid and Vit D.
SKIN VITALITY Home Testing Kit -ZRT Lab
The skin is really the way in. You can't watch your heart age, but you can your skin. Your outside skin is a mirror of the inside body. It is the largest organ system in the body and will tell you everything you want to know about how well the body is working. You just have to know what to ask it.