Broccoli.

Seems harmless, right? You’ve always been told to eat your veggies if you want to grow up big and strong.

But, for Buffalo Bills offensive tackle Seantrel Henderson, it’s essentially the opposite. The small green vegetable could possibly send him to the emergency room.

“There’s a whole lot categories. There’s a whole lot of foods in the categories that I can’t eat,” Henderson said in an interview at St. John Fisher College on Monday.

Henderson has Crohn’s disease, meaning he has complications with his intestines and digestive tract that make it very difficult to eat certain foods without suffering consequences, which can range anywhere from abdominal pain and cramping to vomiting and everything in between. The symptoms can become even more severe, as well.

The third-year offensive lineman dealt with the issue for most of last season before the grueling disease took a turn for the worse prior to Buffalo’s Week 14 matchup against the Philadelphia Eagles.

Henderson was hospitalized due to the condition and was put on the non-football illness list shortly after, effectively ending his 2015 campaign. He started all 10 games he appeared in.

Since that time, it’s been a long road to recovery for the former seventh-rounder out of the University of Miami.

Henderson has endured two offseason surgeries to remove any infected areas of his digestive tract and reattach his intestines.

The 6-foot-7, 331-pounder spent time recovering at the Mayo Clinic in Minnesota before returning to One Bills Drive in June, but the former Miami Hurricane was unable to make a full return to the field prior to breaking from veteran minicamp.

That trend continued throughout training camp until just recently.

Lifted from the active/non-football illness list on Monday, Henderson participated in a practice for the first time since that dreadful day in Philadelphia last December.

He admitted he still needs to add roughly 10 pounds to return to adequate playing weight, but the 24-year old is finally back and ready to compete when given the chance.

That chance may come sooner than expected for the right tackle as the Bills wasted little time in giving Henderson reps in his first practice back according to tweets from WKBW’s Joe Buscaglia and The Buffalo News’ Vic Carucci.

Seantrel Henderson working into the first-team mix. Getting some run at right tackle during team drills. #Bills — Joe Buscaglia (@JoeBuscaglia) August 22, 2016

#Bills wasting little time getting OT Seantrel Henderson w 1st team offense, sharing reps w Jordan Mills. Reggie Bush also got 1st team reps — Vic Carucci (@viccarucci) August 22, 2016

Henderson’s replacement, Jordan Mills, has been anything but outstanding during his time in the starting lineup, and his recent undisclosed knee injury could provide an opportunity for Henderson to wiggle back into consideration for a starting spot once again.

Either way, the massive lineman is just happy to be back doing what he loves.

“It felt good to be back out there with my teammates and getting back in the groove. It was kind of natural, kind of felt like playing the first game in the league again. I was a little nervous. I’ve been out so long. But, other than that, it felt good. It felt great to be back out here with the coaches and the guys,” Henderson said Monday. “My health is fine right now. I don’t have no complications like I used to. Everything is going up right now for me. It’s very satisfying. I went through a lot during the offseason as far as just complications with my stomach — things I’ve never been through before — so, just being out here with the guys, with the team (and) being able to do everything everybody else gets to do, it’s just a blessing.”

Buffalo has been stricken by injuries time and time again this offseason, and the offensive line has been no exception.

Franchise left tackle Cordy Glenn missed the last half of training camp with a high-ankle sprain, while others like left guard Richie Incognito (ribs) have been nagged by little nicks and bruises.

Mills’ knee injury is the latest addition to the list, making Henderson’s return all the more timely.

However, despite being back at practice, Bills coach Rex Ryan won’t say when he expects Henderson to return to game action.

“I’m really happy that, obviously, he’s been cleared to participate. So, that’s a great thing. Anytime it’s a medical deal, that’s where you’re just pulling for the individual. You know how much he wants to play and things, but really you couldn’t do anything about it. We couldn’t comment on him until he did get cleared,” Ryan said during a press conference on Monday. “It’s probably unfair to lay something out there on him — an expectation on him. Let’s let him get through some of these things, and then maybe we’ll have a better idea. But, obviously, it’s been a long time since he’s been out here. I think we’re all excited to see him work, and we’re really happy for him. “You see how much the guy wants it. Obviously you’ve got major adversity in front of you, but there’s only one way to do it, and he’s got to be the guy that does it. So, it’s great to see.”

It’s clear Buffalo would like their young offensive lineman to return to the field as soon as possible, but Henderson isn’t exactly sure when that day will be.

It could be tomorrow’s Week 3 preseason game against the Washington Redskins. Or it could be weeks from now.

Henderson admits there are things he needs to get used to again after being out for so long, but that isn’t going to stop him from giving maximum effort on every play.

He nearly lost his chance to continue his playing career following off-the-field issues that caused him to drop to the seventh round of the 2014 NFL Draft, and he almost lost it again after his recent bout with Crohn’s disease.

With a few final hurdles left to overcome before he’s back completely, the former five-star high school recruit plans to take things one step at a time.

Whether he can reclaim his starting right tackle job at some point this season is still unclear, but it would be unwise to count out the Minnesota native.