Your purchase is backed with a 365-day 100% money-back guarantee. If you change your mind for any reason, you may send an email for the complete return instructions. Amyl Guard is 100% natural, and effective! Thousands of people have enjoyed its benefits and continue to use it because there have been absolutely zero side effects reported. Every capsule is manufactured here in the USA in our state of the art FDA approved GMP (good manufacturing practices) certified facility under the most sterile, strict, and precise standards. Amyl Guard is 100%, natural, vegetarian, and non-GMO. Based on our research, it is best to take Amyl Guard consistently for at least 90-180 days to get the best results.