Jon Jones Hired Food Specialist ... For UFC Comeback

Jon Jones was so serious about getting body ready for his comeback, he hired a food specialist to take over his diet leading up to UFC 197.

TMZ Sports spoke with weight management specialist Louis Giordano who tells us he's been preparing all of Jon's pre and post workout meals for the last 9 weeks.

It's a big fight for Jon -- one that could put him back on top of the UFC -- and Lou says Jones has been super meticulous about his 6-meal-a-day diet, pounding a TON of protein to prepare for battle.

"Chicken, turkey, buffalo/bison, steak, and salmon. I’ve also prepared lots of eggs, veggies such as kale, broccoli, spinach, & arugula. Black rice, sweet potato pancakes, oatmeal and more."

Though he says they don't really watch calories, Lou insisted Jon is no Rob Kardashian -- SO NO CHEAT DAYS.

"We don’t do that. Jon is focused on the prize and excited to get back in the ring, cheating isn’t a part of this."

Check out pics of the vittles below ...