Yes, tegus can safely consume cucumber. These green vegetables are around 96% water with a little fiber, so they are not the most highly nutritious food out there for your lizard, but they are perfectly safe to eat.
Still, there are a lot of better options out there for your tegu and it is important to offer a varied diet that includes different types of fruits and vegetables as well as meat.
If you are choosing to feed your tegu cucumber, do so sporadically and make sure to pick organic cucumbers that are free from pesticides and do not have a lot of seeds in them (if they do, remove the seeds before serving).
You do not need to peel cucumbers, but you may want to cut them into small pieces to riduce the risk of a choking.
PetsWithScales.com is an informational website about big lizard pet care. We collect and provide information from different sources across the web on how to keep and care for reptiles as pets. The species we mainly deal with are tegus, monitor lizards, skinks and geckos. Our aim is to provide high quality information to help pet owners make better, more informed decisions about their animal’s diets, health and life.