Steroids and other muscle-building drugs long have been an accepted part of the wrestling culture, allowing the biggest names to pump up to ungodly proportions that wouldn’t be possible through natural means.

Granted, nobody comes right out and tells a wrestler he or she should take steroids. But all one has to do is attend a match in person or watch one on TV to realize some of these physiques just aren’t plausible without help from a syringe.

“Somebody says you need to put 25 pounds on your upper body,” said Larry DeGaris, who teaches sports marketing at the University of Indianapolis and moonlights on the independent wrestling circuit as “The Professor” Larry Brisco. “Well, if you have an athletic background and have been around sports for a while, you know there’s only one way to do that. Nobody needs to tell you. It’s just a tacit understanding.”

Steroids were found in Benoit’s home, though investigators haven’t determined if they played any role in the brutal killings of his wife, Nancy, and their 7-year-old son.

World Wrestling Entertainment, which employed Benoit and holds a virtual monopoly grip on the industry, was quick to point out that this tragedy — apparently carried out over an entire weekend — doesn’t come with the classic signs of ’roid rage, the violent, unpredictable outbursts that can be caused by someone who abuses steroids.

A top anti-doping expert agreed but said it’s too early in the investigation to draw any firm conclusions.

“I can paint any number of scenarios that explain this without invoking ’roid rage,” said Dr. Gary Wadler, a member of the World Anti-Doping Agency. “’Roid rage tends to be impulse control. This event happened over two or three days. It has the earmarks of some calculation.”

The WWE also was quick to announce Benoit had passed his last drug test in April, part of the organization’s “Wellness Program” that was put in place after the death of star Eddie Guerrero two years ago.

But Wadler doesn’t sound all that impressed with the WWE’s testing procedures. He’s especially troubled that the WWE refuses to discuss the program in any detail.

Both Evers and wrestling journalist Bryan Alvarez, who’ve seen guidelines for the program, report two troubling loopholes:

—A wrestler can pass the doping test with a testosterone to epitestosterone ratio of 10:1, more than double the WADA standard. Under WADA rules, athletes are in violation starting at 4:1; the average ratio is 1:1.

—A wrestler who tests positive can be excused if he produces a doctor’s prescription and a medically justified reason for taking the drug in question.

There’s no justifying that happened at the Benoits’ suburban Atlanta home last weekend.

Alvarez, who covers the sport extensively for the Web site www.wrestlingobserver.com, has some inkling of the demons that might have overtaken the wrestler.

He said Benoit never got over the 2005 death of Guerrero, a former WWE champion and four-time tag-team titleholder who was 38 when he died of a heart attack, perhaps caused by the alcohol and drug abuses that friends thought he had beaten.

“Chris’ closest friend in the world was Eddie Guerrero,” Alvarez said. “He could cry to him. He could tell him everything. After Eddie died, I talked to Chris. He was broken man.”

Last year, another of Benoit’s wrestling buddies, 263-pound Mike Durham (known in the business as Johnny Grunge), died at 39 from complications cause by sleep apnea, a condition that often affects larger people such as wrestlers and football players.

“It was about this period of time that people started noticing weird behavior, paranoid behavior, which would indicate (Benoit) was using a lot of drugs,” Alvarez said. “He was alone. He was on the road a lot, having to perform at a high level, having to look a certain way. I think the drug use escalated, and his whole world basically fell apart.”

Laurinaitis knows what a lethal potion it all can be.

His friend since childhood and longtime tag partner, Road Warrior Hawk (Michael Hegstrand), died from a heart attack in 2003. Just 46, Hegstrand had battled alcohol and drugs, in addition to using steroids, Laurinaitis said.

“I used to watch him sometimes and just shake my head. I would think, ’Oh my God, what in the world is he doing? Why is he doing that?”’ Laurinaitis said. “I saw quite a few guys go down that path.”

Now, they’re all gone.

Benoit. Guerrero. Hawk.

Martel. Bigelow. Awesome.

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Not to mention Curt “Mr. Perfect” Hennig, Big Boss Man, Hercules, Crash Holly, Davey Boy Smith, Miss Elizabeth, Terry Gordy, “Gentleman” Chris Adams, Yokozuna, “Ravishing” Rick Rude, Owen Hart, Louie Spiccoli, Brian Pillman, Eddie Gilbert, Buzz Sawyer, “Quick Draw” Rick McGraw, Gino Hernandez and much of the Von Erich clan.

All dead before they were 50 — and that’s just a sampling of an ever-growing list.

It doesn’t take someone who can distinguish between a full nelson and a sleeper hold to know that’s far too many wrestlers dying far too young.

“It’s gotten to the point that just about every show in the country is starting with a ten-bell salute,” said DeGaris, the professor and wrestler, referring to the traditional farewell to a fallen competitor. “You kind of look at some of the old pictures, and you’re the last man standing.”