Alarm bells rang when it was revealed that Mekhi Becton’s Combine drug test was flagged. But the word from the man who knows the giant offensive tackle as well as anyone is this: Don’t be alarmed.

“He’s never had a failed drug test from my knowing,” Louisville offensive coordinator/offensive line coach Dwayne Ledford told The Post. “He was a kid that I absolutely as a football coach never ever worried about what he was doing Saturday after a game, or a Thursday going into a game. “

Ledford, a seven-year NFL offensive lineman, chuckled over the report of an anonymous scout charging that the 6-foot-7 1/2, 264-pound Mountain Man loves cooking more than he loves football.

“Well, I’ve never seen him cook,” Ledford said, “and I’ve seen him play a lot of football, and so I couldn’t really speak to that. From what I’ve seen, I think the kid likes to play football more than he likes to cook.”

NFL teams — offensive tackle-starved Giants and Jets included — will have to decide on Virtual Draft Night whether or not Becton’s flagged test was indeed an aberration.

Ledford’s advice: pass on him at your own peril.

“I tell people all the time if he had played basketball, he’d be a 20-10 person,” Ledford said. “I think that he is just now starting to come into his own. I think he’s just now scratching the surface at how good he can actually be.”

Louisville strength and conditioning coach Mike Sirignano compared Becton’s movement skills to the young Shaquille O’Neal.

“He’s just so light and quick on his feet and just able to do things that other people his size would never be able to do,” Sirignano told The Post.

Sirignano joined the Louisville program in December 2018 and recalled that Becton had ballooned to 389 following a period of inactivity.

“Everything he ingested, he had to send me a picture of throughout the day,” Sirignano said. “If he didn’t send the picture he had to do 25 up-downs. He was supposed to eat like 7, 8 times a day depending on if he had a workout. After his workout he owed me 45 minutes of cardio every single day on the treadmill.

“He never had to do up-downs. He went from about 26 percent body fat to 17.5 percent with 317 pounds of lean mass from January to August.”

Ledford vouches for Becton’s dedication to keeping his weight from ballooning.

“I feed the guys pizza and wings every Thursday,” Ledford said. “About Week 3, he came up to me one time, ‘Coach, can you get me a salad?’ He got heavy one week during the season, but it wasn’t something that he was always battling or anything like that. He stays pretty consistent with his weight.“

Becton’s playing weight ranged from 359-367 after he surrendered his late-night intake. His 5.1 40 at the Combine opened eyes. “He’s not like a junk food eater,” Sirignano said. “He loves to cook, he loves to experiment, he loves to go to nice restaurants and try a bunch of things. It wasn’t so much what he was eating, it was how he was eating.”

It made devouring defenders so much easier. “It was almost every game you would see him just tossing people and throwing people,” Ledford said.

But Ledford wanted him finishing people. “I told him, ‘Mekhi, if you really want to set yourself apart with these other guys, you need to finish the guy.’ Towards the end of the season he was phenomenal at it,” Ledford said.

Sirignano considers Becton a big teddy bear. “His laugh is so gigantic,” he said. “Kinda like Shrek’s laugh, really.”

A gentle giant. “Having a family’s important to him,” Ledford said. “He wants to travel. He’s kind like a homebody.”

Becton has played both left and right tackle. “He’s got more muscle on his body than most players in the NFL weigh,” Sirignano said. “He could probably line up at tight end if they want him to run a route.”

The Giants and Jets don’t need him to play TE. They need someone to block for their young quarterback and marquee running back. Giants GM Dave Gettleman likes to remind everyone that big men allow you to compete. None bigger than Mekhi Becton.