Plexus MegaX Review – Is It Safe To Use & Worth ... Jan 10, 2022 · Plexus MegaX is considered safe for use, as it has no known side effects. It is produced from plant-based ingredients. It is free from allergens and other ingredients that might lead to undesirable side effects. Plexus MegaX Questions and Answers Q: What is the best way to take MegaX? Two at the same time or one in the morning and one at night?