Arginine Ethyl Ester Di-HCL- Arginine Ethyl Ester gets quickly absorbed in the body and stays for a longer time. Arginine Ethyl Ester Di-HCL is considered more effective as compared to other nitric oxide products as ethyl ester is added to the arginine molecule. Due to ethyl ester, arginine becomes less polar and gets absorbed in the digestive tract with ease. It also provides protection to the arginine molecule from getting degraded. Arginine Ethyl Ester Di-HCL helps in muscle growth and increases the nitric oxide levels more than the regular arginine supplements. As it is an arginine derivative, the effect of Arginine Ethyl Ester Di-HCL will be stronger than the regular products.