Ithnaan

The Ithnaan are a humanoid species native to the Sohval galaxy.

Biology
Although life on Ithnos was carbon-based and oxygen-breathing, it was built on right-handed sostra-amino acids. This placed the Ithnaan in a distinct minority in their home galaxy; the Sab'a are the only other sapient sostra-protein species. The food of humans, ansari, and daksin (who evolved in aris-amino acid-based biospheres), will at best pass through an Ithnaan's systems without providing any nutrition. At worst, it can be highly toxic and fatal if not immediately treated.