KJ Noons and King Mo use Compressed Oxygen, as SF Houston fighters are not tested for illegal substances (updated)
These screenshots below show a substance being ingested by King Mo and KJ Noons (coincidentally betting favorites) before their respective bouts.
It appears that both fighters were using a TRUO2 Portable Oxygen Can. According to their official site it can “Maximize Power and Explosiveness!
Compressed oxygen is a substance banned from nearly every endurance sport, including MMA; in every state, including Texas. The Texas state athletic comission