Did Chris Hemsworth Take Steroids for THOR?

chris hemsworth steroids
Written by Erny Peibst

Medically approved by Dr Thomas O'Connor

Didst Chris Hemsworth taketh steroids to playeth the mighty Thor? Or was thy gains of a natural kind?!

Don't worry this whole article won't be written in Shakespearean…but the idea did cross my mind.

So did Hemsworth use steroids to bulk up for the role of this Asgardian God?

The general consensus is yes. And the reasoning for this is…

“He's got to be on steroids, he's jacked!”

However, this type of opinion holds no weight and lacks credibility.

Looking at how big someone is and saying they must be on steroids is naive, because building muscle comes down to a person's genetics, which is individualized.

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Everyone has different limits for building muscle.

One guy who's lifted weights for 20 years might be dwarfed by a genetically gifted 14 year old, who's not even finished going through puberty yet…

People forget that bodybuilding is a sport where success is largely determined by genetics, rather than hard work. Working your ass off and eating clean only gets you so far in this sport unfortunately.

Hard work will allow you to fulfil your genetic potential but it won't turn weak genetics into exceptional ones.

So is Hemsworth natty or has the ex-Home and Away actor been juicing? (Not the fruit kind).

Here's my findings…

Chris Hemsworth Before Thor

Chris Hemsworth gained 20lbs of muscle in preparation for Thor (2011).

The most reliable way of detecting if someone's taken steroids is looking at their body composition over several years.

Natural guys will build a significant amount of muscle when they first start lifting weights; these gains will come in the space of a few months. However, from that point they'll plateau (staying the same size).

So if a guy's been lifting weights for several years and reaches a plateau…then suddenly blows up and gets huge, it's obvious they're taking steroids.

Lets take a look at what Chris looked like in Ca$h (Chris' last film before Thor)…


The time difference between these Ca$h and Thor was 1 year.

From this picture we can see that Chris looks pretty muscular already, albeit not AS jacked as he was in Thor.

IF Chris had been lifting weights during the filming of Ca$h, he's almost certainly used steroids to pack on even more size/mass.

Because gaining 20lbs of muscle for a non-newbie is unheard of (without using steroids).

Chris Hemsworth: God-Like Genetics?

In an interview with Men's Health Chris said the following:

“It wasn’t until Thor that I started lifting weights. It was all pretty new to me” (1).

Holy shit.

This means he was jacked before he even set foot in a gym…

It makes sense that his gains from Ca$h to Thor are natural because he's only gained 20lbs of muscle.

Experts agree that this is the average amount of lean muscle built when a newbie starts lifting weights (2).

However, steroid-users typically gain 30-50lbs in the first 3 months (3).

Here's another comparison picture when he was in Home and Away (2007-2011).


He hasn't exactly doubled in size since this time. Yes he's added some muscle, but this is far from a typical steroid transformation.

I've seen some before/after pictures of Chris online, which aren't to scale and he's in different positions. These can create an illusion that someone's gained 100lbs of muscle.

However, the comparison photo above is to scale, with him being in the exact same front, relaxed position.

Bobby Hanton, Chris Hemsworth's close friend and stunt double, also said:

“Chris is naturally a monster and all he has to do is look at weights and he grows” (4).

All these comments and evidence point to the mighty one being natty.

Verdict: Natty

chris hemsworth body

Before doing hours of research for this article I would've said Chris Hemsworth is juicing.

In a matter of months he got BIG. And by big I mean even by natural bodybuilder's standards.

But it's clear now that his transformation was the result of newbie gains.

Before picking up Mjolnir, Chris was an absolute stranger to bodybuilding and lifting weights.

…despite already being jacked!

Also if he'd taken steroids, he wouldn't have gained 20lbs of muscle…he would've added 30-50lbs and got even more swole.

It seems like Chris Hemsworth was simply destined to play Thor…

In fiction, Chris is a god.

In reality, he's got the genetics of a god!



(1) http://www.menshealth.co.uk/living/men/chris-hemsworth-interview

(2) http://www.livestrong.com/article/412614-the-average-muscle-gain-per-month/

(3) http://www.timinvermont.com/fitness/test1.htm

(4) http://www.dailymail.co.uk/tvshowbiz/article-3586061/Chris-Hemsworth-s-stunt-double-eats-35-meals-day-trains-18-hours-week-match-Thor-s-monster-physique.html

Erny Peibst

Erny Peibst

Erny has over 5 years of experience of steroids and PED use in bodybuilding, Erny uses Aretheyonsteroids.com as a platform to share his valued knowledge and expertise.
Erny Peibst

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    9 Comments on Did Chris Hemsworth Take Steroids for THOR?

    1. Totally achievable. I am a fellow Australian with a similar ‘curse’. Even thougn play squash 2 or 3 days a week, 45 years of age, 5’11” and 220 pounds. Started working recently out a few days a week to reduce body fat and put on over 5 pounds of additional muscle in the first month of training.

    2. Your misconstruing the facts. I will be the last person to conclusively state that Chris used chemical enhancement to augment his physique.

      However, to gain around 20 lbs of muscle on a already fit looking frame, WITHOUT gaining fat, even considering a perfectly optimized dietary regime, in 1 year is a extremely difficult task. Even in the case someone is completely able to accommodate his lifestyle specifically for the purpose of ”getting jacked”.

      Now, consider that even a very modest amount of chemical assistance would have a great effect in minimizing the time, effort, motivation and dedication needed to achieve this look. All of this is achievable, without a major irreversible negative medical side-effect, if any side effect at all. The most obvious conclusion that a well paid actor would actually refuse taking chemical enhancing drugs (under medical supervision) and go through all that effort would be very hard to argue for.

      The general populace does not take in account that:

      1. Building a muscular lean physique is incredibly time consuming and requires excessive dedication and motivation.
      2. Anabolic steroids are readily available to certain subsets of the population (such as bodybuilders, celebrities) and under medical or professional supervision have nearly zero drawbacks (negative effects).

      • @Abrasx – You said, “However, to gain around 20 lbs of muscle on a already fit looking frame, WITHOUT gaining fat, even considering a perfectly optimized dietary regime, in 1 year is a extremely difficult task”.

        This isn’t true. It’s very easy to gain 20lbs of muscle naturally even in the space of a few months IF you haven’t lifted weights before and then start going to the gym. Any person who has ever lifted weights would’ve experienced these ‘newbie gains’.

    3. No he’s not – He yo yo’s . If you look at the first Thor and the watch Vacation he goes from being jacked to deflated – Then Thor again jacked – Natty doesn’t lose their gains that quick someone that uses steroids does.

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