You can relax because there is not a more natural medicine on the market. Insulin is the best. There are no side effects and it is an exact DNA replica to what your own body makes. Some people say that hypoglycimia is a side effect but thats is what it is supposed to do so not a side effect. There is also no build up of insulin in the body and novalog works fast and leaves just about as fast as it works. You will see and you will love it.