Resurge is absolutely 100% natural, safe and effective. Many thousands of folks enjoy taking Resurge every day and there has been absolutely zero side effects reported. Every capsule of Resurge is manufactured here in the USA in our state of the art FDA approved and GMP (good manufacturing practices) certified facility under the most sterile, strict and precise standards. Resurge is 100% all natural, vegetarian and non-GMO. As always, if you have a medical condition it's recommended to consult with your doctor.