Microvascular Health

The goal of this study is to learn how a supplement Quercetin can affect microvascular function. Participants will: * give two blood draws of 5 mL each * have a camera placed under the tongue to take pictures of blood vessels * have 2 laser Doppler microdialysis catheters placed on the forearm to monitor blood vessels before and after local drug infusion Researchers will compare blood vessel function of those who take estrogen supplements to those who do not.