I have been using Ox for about a year and a half on and off. I have noticed an increase in stable energy throughout the day as well as more sound sleep at night. Now that I'm over 40, I think Toby Keith said it best with I'm not as good as I once was. With regular use of Ox I feel better in general, stronger and more motivated to do physical activity. I have noticed an increase in stamina. Combined with Ammo, I am steadily loosing my spare tire and getting back to my fighting weight. Mama doesn't seem to mind either if you get my drift.