Most of the ingredients in Nerve Rejuv have years of scientific research to prove their efficacy, which is why the risks of side effects are minimal with its usage. According to the company behind this product, Nerve Rejuv is free of any toxic chemicals, steroids, hormones, or GMOs. The absence of these harmful chemicals renders this product a safe supplement for all adults above 18 years. Even though Nerve Rejuv consists of plant extracts and health-supporting ingredients, it is not recommended for nursing and pregnant women. Also, people with chronic health conditions such as diabetes and heart diseases should avoid taking this supplement. Those who are not sure about taking this supplement or any health supplement can talk to their healthcare provider about supplement safety before investing their money in it.