Marc Lobliner – Is He On Steroids?

Marc Lobliner is the owner of the popular YouTube fitness channel TigerFitness. He has a large following and thousands of vlog videos. Many beginners follow his advice and training ideas. However, is Marc Lobliner a natural bodybuilder? Can you look like him without taking steroids? The answer inclines strongly towards no because:

1. Gynecomastia

Marc Lobliner has visible gynecomastia (growth of female breasts) in many photos. Having gynecomastia after puberty is often a sign of steroid usage.


via:; Notice the red skin, the bitch tits, the vascularity…all signs.

2.Insane body transformations

In many before and after photos, Marc Lobliner presents fast and almost unreal body transformations. Natural bodybuilders have a really hard time gaining muscle mass. The process is not fast at all. Yet Marc Lobliner is not a beginner and often gains more than 20lbs during his transformations.

Meanwhile, naturals need years to gain 20lbs of real muscle. Why? Because natural growth is slow, and the potential is lower.



3.Marc Lobliner weighs more than former Mr. Olympia competitors

According to Marc Lobliner’s profile on, he has the following body stats:

Height: 5’6″ (167 cm); Weight: 217 lbs (98 kg ); Body fat: 5%

In comparison, former Mr. Olympia Frank Zane had the following stats in his prime:

Height: 5’9″ (175 cm); Weight: 185 lbs (84 kg ); Body fat: 5%

Conclusion: Marc Lobliner is three inches shorter than Frank Zane and 32lbs heavier.

Let’s compare Lobliner to another former IFBB professional – Mike Mentzer.

Height: 5’8″ (173 cm); Weight: 225 lbs (100 kg ); Body fat: 5%

Conclusion: Marc Lobliner is two inches shorter than Mike Mentzer and has 7lbs less muscle mass.

visited on April 20, 2014


  1. Donovan

    Marc doesn’t claim natty. Calling him a liar is pathetic. He’s an honest and hard working man who doesn’t go out of his way to shit on other people like vegan gains or some other channels do. He makes it very obvious on purpose that he uses steroids (not explicitly) and in no way tries to claim natty.

    1. fakawat

      Do your homework before u talk . he does claim natural and backs up all other fake nattys..And yes i have taken steriods so i have much experience spotting others

  2. NotNatty

    Actually he doesn’t claim natty, he admits to using medical prescribed steroids because some stuff in his body are at low levels.

    1. Derik

      Sorry to break it to you; but when your using hormones (prescribed or not) you become not natty. You’re altering the level of testosterone your body is naturally producing. Did he claim that he has a legitimate medical issue? Something wrong with his pituitary function? Tumor? You can go to any of these “anti-aging clinics” and get prescribed to testosterone. I along with many friends have done it. It’s just an excuse to pump your testosterone up to the higher end of the “physiological” spectrum. Def on a higher than therapeutic dose during these periods he puts on twenty pounds of lean mass. He is also def on growth. If he says otherwise, he is a liar. I’ve been around for a while, used plenty of anabolics and I can spot a BS artist.

  3. Stefan

    He doesn’t claim natty and he makes it clear that he isn’t without saying it.

    He’s not saying it for legal reasons, which is understandable.

  4. InTheKnow

    Marc is not natural….not by a long shot. While he does have a script for HRT, it’s just an excuse to not claim natty. He cruises at 500mg/week and will blast to 750 or higher. He’s routinely cycled Tren and uses cutting agents in addition to his strict diet to maintain his condition w/o sacrificing muscle mass. He’s also on at least 2IU of HGH/day. All that and he’s still mediocre. Just goes to show you the genetic limitations of a true natural.

  5. Dan

    Funny thing is, he weighs the same and has same or more muscle mass but dont look nearly as good as Frank Zane and Mike Mentzer. They both look twice the size as him with much biggar chests and arms.

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