Juicer.
Basing it on the massive veins running down his biceps and arms (Atypical of HGH use) and the famous roid delts in the second pic, third pic is just ridiculously low BF%, even strict carb cycling wouldn't get you anywhere near that %age whilst maintaining that much muscle.
Good rule of thumb is to check their Instagram/twitter - if they're natty they'll announce it loud and proud in their bios, if they aren't they know they'll get called out and will be against an unholy shitstorm of abuse from other "Fitness models/celebs" (Cringe) hereby blowing their fake natty title.
His claims of being natty are just so he can sell weak minded people glorified caffeine pills full of caking agents and fillers.