Ketoxen
Ketoxen is a term that appears to be a neologism or a portmanteau, combining "keto" and "xen." The "keto" prefix typically refers to the ketogenic diet, a low-carbohydrate, high-fat eating pattern. The "xen" prefix, derived from Greek, means "foreign" or "stranger." Therefore, "ketoxen" could plausibly refer to something outside the standard or expected parameters of a ketogenic diet, or an unusual or foreign aspect related to it.
Without further context, the precise meaning of ketoxen is ambiguous. It might describe a food or ingredient