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over 343,840+ happy customers

AMERICA'S #1 NATURAL MUSCLE BUILDER

The Supplement That Works… While You Train Boost Your Muscle Growth, Strength, and Recovery Naturally!


The Supplement That Works… While You Train Boost Your Muscle Growth, Strength, and Recovery Naturally!



You're about to transform your entire fitness journey with OSL Turkesterone, the 100% Natural Anabolic Powerhouse.

YES! I Want Faster Gains, Better Recovery, and Enhanced Performance Today!

100% Money-
Back Guarantee

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From $85

Bodybuilder posing with a focus on a Turkesterone supplement bottle.

Introducing OSL Turkesterone

'Turkesterone supplement bottle with red and white label featuring 'Old School' logo.'

What is it?

Turkesterone is a naturally occurring ecdysteroid, a type of steroid hormone found in plants and insects.

What does it do?

Turkesterone increases muscle mass by promoting protein synthesis, essential for muscle repair and growth. It enhances endurance and strength, making it popular among athletes and bodybuilders. As an adaptogen, it helps the body cope with stress, improving health and recovery. Unlike anabolic steroids, turkesterone is non-hormonal and doesn’t interfere with natural hormone levels, reducing side effects. It also aids in fat loss by boosting metabolism and promoting fat breakdown.

Why OldSchoolLabs?

Although Turkesterone is a good supplement by itself, we have taken the extra step of adding a rare and potent herbal supplement called Tongkat Ali. This truly sets us apart, giving you the maximum of the maximum. Additionally, our labels are completely transparent, so you know exactly what you are putting in your body, unlike other brands that sell products with “special blends.”

3rd party
tested

Premium
Ingredients

GMP Certified
Facility

Made In
U.S.A.

No Useless
Additives

Transparent
Label

If you answer yes to any of these...
You need OSL Turkesterone!
DO YOU...

Hit plateaus in your muscle

growth?

Wake up sore and fatigued after workouts?

Have to use multiple supplements to see results?

Get burned out or overtrained

easily?

Struggle with slow strength

gains?

Want better pumps and muscle fullness?

Have hormonal imbalances affecting your gains?

Wake up feeling like you haven't recovered from your last workout?

Experience low energy and poor focus during workouts?

100% Money-
Back Guarantee

Free Shipping
From $85

Let The Results Do The Talking

Man standing shirtless with a headband and blue shorts.
A shirtless man wearing red and blue striped shorts stands against a plain white background.

I'm really impressed

"I was super skeptical about this whole Turkesterone thing. Like, I've tried a million supplements and most of them are just hype. But this stuff is the real deal. I'm not sure how to explain it, but my workouts feel easier, and I'm seeing results I haven't seen in forever. Definitely recommend."

- Owen W.

Verified Customer

Shirtless man wearing a cap and blue shorts, standing against a plain background.
Shirtless man showing his muscular physique and a tattoo on his left arm.

I'M PUPPED BABYYY

"As someone who's pretty nasty about what I put in my body, I approached OSL Turkesterone with a lot of skepticism. BUT, the results have been nothing short of f* great man. I've seen a huge increase in strength and energy without any effects. It's a game-changer, bro."

- Jack S.

Verified Customer

A shirtless man with tattoos and a beard, standing against a plain wall.
Shirtless man with dreadlocks and tattoos, standing against a wall, holding yellow item.

Like a trainer in a pill

"I've been using OSL's Turkesterone for a few months now and looking at the difference on the pic says it all. My muscle mass has increased significantly, and my recovery time is insane all while I lost a lot of fat."

- Zarasi P.

Verified Customer

A shirtless man flexing his arms in front of a door.
Man flexing muscles in black shorts, standing in front of a white door.

Satisfied.

"This is the real deal for packing on muscle. Recovery is insane, and my lifts are through the roof. Can't live without it."

- Dave L,

Verified Customer

Person wearing patterned boxer shorts and a headband, viewed from the back, against a dark background.
Bodybuilder posing in gym, showing muscular back and legs.

OSL Turkesterone

"This shit is crazy! Made me stronger, faster, and recovered like a beast. Total game-changer, bro."

- Adam D.

Verified Customer

Man standing shirtless with a headband and blue shorts.
A shirtless man wearing red and blue striped shorts stands against a plain white background.

I'm really impressed

"I was super skeptical about this whole Turkesterone thing. Like, I've tried a million supplements and most of them are just hype. But this stuff is the real deal. I'm not sure how to explain it, but my workouts feel easier, and I'm seeing results I haven't seen in forever. Definitely recommend."

- Owen W.

Verified Customer

Shirtless man wearing a cap and blue shorts, standing against a plain background.
Shirtless man showing his muscular physique and a tattoo on his left arm.

I'M PUPPED BABYYY

"As someone who's pretty nasty about what I put in my body, I approached OSL Turkesterone with a lot of skepticism. BUT, the results have been nothing short of f* great man. I've seen a huge increase in strength and energy without any effects. It's a game-changer, bro."

- Jack S.

Verified Customer

A shirtless man with tattoos and a beard, standing against a plain wall.
Shirtless man with dreadlocks and tattoos, standing against a wall, holding yellow item.

Like a trainer in a pill

"I've been using OSL's Turkesterone for a few months now and looking at the difference on the pic says it all. My muscle mass has increased significantly, and my recovery time is insane all while I lost a lot of fat."

- Zarasi P.

Verified Customer

A shirtless man flexing his arms in front of a door.
Man flexing muscles in black shorts, standing in front of a white door.

Satisfied.

"This is the real deal for packing on muscle. Recovery is insane, and my lifts are through the roof. Can't live without it."

- Dave L,

Verified Customer

Person wearing patterned boxer shorts and a headband, viewed from the back, against a dark background.
Bodybuilder posing in gym, showing muscular back and legs.

OSL Turkesterone

"This shit is crazy! Made me stronger, faster, and recovered like a beast. Total game-changer, bro."

- Adam D.

Verified Customer

100% Money-
Back Guarantee

Free Shipping
From $85

Throw Those Ineffective Supplements Away!
Do you wake up sore, with slow gains and compromised performance?
Newsflash....your current supplements are to blame!

Many supplements on the market are filled with artificial ingredients, ineffective compounds that don’t really do anything, and sometimes even harmful substances…

They promise to burn fat…

They promise to help build muscle…

They promise to boost testosterone…

But they never work…

Leaving your cabinet a supplement graveyard.

Here’s the dark reality…

These products often rely on proprietary blends, hiding the true amounts of ingredients and potentially shortchanging you on the effective compounds.

In fact, many popular supplements contain such small amounts of active ingredients that they're practically indistinguishable from placebo.

Those 40 gram protein drinks you're consuming daily could be going to waste without the right anabolic support.

Plus many people are sensitive to artificial ingredients and fillers. Yup, you might be putting unnecessary… Ineffective junk in your body!


Ineffective Supplements
Assorted capsules and pills in various shapes and colors.
Many supplements on the market contain ineffective ingredients or underdosed compounds, leading to disappointing results and wasted money
Two vials filled with red and green liquids.
Low-quality supplements often rely on stimulants and artificial ingredients that may provide a temporary boost but fail to deliver sustainable muscle growth and strength gains.

Your current supplements ARE holding you back from reaching your true potential. It's time to get a supplement that ACTUALLY delivers results!

It’s Time To Unlock Peak Performance
Without Losing Your Natty Card…

OSL Turkesterone
A supplement bottle labeled 'Old School Turkesterone with Tongkat Ali.'
OSL Turkesterone™ is the best-kept secret of professional athletes, bodybuilders, fitness models, and strength coaches around the world. It is a completely natural and scientifically-backed anabolic supplement designed by our team of experts that does wonders for your muscle growth, strength, and recovery while you train!
All Body Types
For All Ages
Performance-Enhancing
Hormone-Friendly

The Two Special OSL Ingredients

Turkesterone

Muscle Growth:

Turkesterone is believed to help increase muscle mass by promoting protein synthesis, which is crucial for muscle repair and growth.

Performance Enhancement:

It may enhance endurance and strength, making it popular among athletes and bodybuilders.

Adaptogen Properties:

As an adaptogen, turkesterone can help the body cope with stress, which is beneficial for overall health and recovery from intense physical activity.

Non-Hormonal:

Unlike anabolic steroids, turkesterone is non-hormonal and does not interfere with the body's natural hormone levels, reducing the risk of side effects associated with steroid use.

Fat Loss:

Some studies suggest that turkesterone may aid in fat loss by increasing metabolism and promoting the breakdown of fats.

Tongkat Ali

Pile of sliced dried roots.

Boosts Testosterone Levels:

One of the most notable benefits of Tongkat Ali is its ability to naturally increase testosterone levels in men. This has various positive effects, including improved muscle mass and strength, enhanced libido, and overall better mood and energy levels.

Enhances Sexual Health:

Due to its effects on testosterone levels, Tongkat Ali is often used to improve sexual function and health. It has been reported to enhance libido, erectile function, and fertility.

Stress & Mood Improvement:

Tongkat Ali has adaptogenic properties, which means it helps the body adapt to stress more effectively. Studies suggest it can reduce the levels of stress hormones in the body, improve mood, and combat symptoms of fatigue..

100% Money-
Back Guarantee

Free Shipping
From $85

What makes OSL
TURKESTERONE
The Perfect Natural Anabolic
Outline of a flexed arm muscle.

Battling plateaus and slow gains is a thing of the past with the anabolic properties of Turkesterone

Concentric circles creating a ripple effect on a black background.

A rare ecdysteroid, one of the most potent found in nature, naturally enhances protein synthesis without affecting your hormone levels.

When it comes to muscle growth, nutrient partitioning is huge. Not only does it help promote lean muscle gain, but it can also keep fat gain at bay

Muscular man standing near a container of Turkesterone supplements with a capsule illustration.

Our Turkesterone is extracted to the highest purity standards, which means it is more potent and effective than cheaper alternatives.

A shatter effect resembling a broken glass pattern.

Ever hit a plateau that seems impossible to break? As your fitness journey progresses, it becomes harder to make gains. OSL Turkesterone helps you push past these barriers.

Our OSL Turkesterone is not treated with any harmful chemicals or fillers, which means it's healthy for your body and won't compromise your natural status

OSL Turkesterone products are made from 100% pure plant-based ecdysteroids. They meet the strictest guidelines for purity and potency

Bodybuilder posing beside Old School Labs Turkesterone supplement.

There is no better feeling than the surge of strength and muscle fullness you experience when OSL Turkesterone kicks in during your workout!

It's a life-changing experience!

over 343,840+ happy customers

Why OSL Turkesterone Is For You

OSL Turkesterone Is Perfect For You If...

You want to wake up feeling stronger and more muscular day by day
You want to break through plateaus and see consistent progress
You want to recover faster and train more frequently
You want to have incredible workout sessions every time
You want to wake up feeling energized and ready to crush your goals
It's basically perfect for every serious athlete!

Naturally Improve Your Physique, Performance, And Recovery, One Workout At A Time


100% Money-
Back Guarantee

Free Shipping
From $85

Why everyone needs OSL Turkesterone

Why OSL Turkesterone Is For You
A man with tattoos roars, while a lion looks on in the background.
Faster Muscle Growth
The anabolic properties of OSL Turkesterone allow you to build muscle more efficiently at all times, both during and after your workouts, without the discomfort associated with synthetic hormones and the constant struggle against plateaus for consistent muscle gain.
Hand holding a container of Old School Turkesterone dietary supplement.
Enhanced Recovery
Industry-leading strength coaches have also known for some time now that recovery is where real growth happens. As you push your limits in the gym, your muscles need optimal conditions to repair and grow stronger. With OSL Turkesterone, your recovery is supercharged, allowing you to bounce back faster and train more frequently.

With OSL Turkesterone, your muscles recover more efficiently when you rest. Not only is this better for overall growth, but it actually keeps you primed for your next workout... so you can start every training session feeling fresh and ready to set new personal records!
A muscular man flexes his arms in a gym.
Goodbye Plateaus
Chalk up another win for Turkesterone when it comes to breaking through plateaus. While traditional supplements often lose effectiveness over time, Turkesterone continues to enhance your body's muscle-building processes -- which means you can start seeing consistent progress, week after week. If you've been stuck at the same size or strength level, you'll notice a significant breakthrough in your gains.
Muscular man in a gym, wearing glasses and a tank top, showing a determined expression.
Increased Strength
Generally speaking, stronger muscles lead to better performance and more impressive physiques. Perhaps the biggest advantage of all when you switch to OSL Turkesterone is the rapid increase in strength you'll enjoy. No more frustrating plateaus where your lifts refuse to budge. Let your hard work in the gym pay off by treating yourself to nature's most potent anabolic compound, in every training session!
Bottle of Old School Labs Turkesterone dietary supplement with Tongkat Ali on a blurred background.'Old School Turkesterone supplement bottle with 120 capsules on a blurred background.'
The benefits are endless

Instead of spending a fortune on various supplements that promise the world but deliver little, All you need is OSL Turkesterone!

Believe it or not, elite athletes and bodybuilding pros have known about the natural anabolic secret of Turkesterone for a while now. It makes perfect sense when you realize that all of your intense training and precise nutrition is going to waste when you rely on ineffective supplements. You carefully plan your workouts and meals, and then proceed to shortchange your results with supplements that barely move the needle.

No wonder your muscle-building efforts aren't delivering the results you expected. They need the right anabolic support to maximize their effects! OSL Turkesterone's natural anabolic properties enhance protein synthesis by up to 20% -- a massive difference compared to traditional supplements.

What makes OSL Turkesterone different
Not All Anabolics Are The Same
One of the biggest misunderstandings about anabolic supplements is that people think every product is the same.
We've made sure that OSL Turkesterone is the absolute best natural anabolic you can buy. One of the biggest differences is that almost all Turkesterone supplements you find on the market are low-quality extracts with poor bioavailability, which is equivalent to taking a placebo and much cheaper to produce. OSL Turkesterone is extracted and formulated to the highest standards, meaning that you get 50% MORE ACTIVE COMPOUNDS per serving than standard Turkesterone supplements. That's HUGE.

All OSL Turkesterone products meet the absolute highest standards of purity and potency by third-party testing, which is the leading international supplement quality standard.
Woman posing with a mug and wearing a retro-themed T-shirt against a red background.Man with headphones and headband holding a supplement container in a gym setting.Muscular man in a gym holding a supplement bottle and smiling.Smiling woman holding a protein powder tub and a plate with pancakes.Muscular man in gym smiling, holding supplement bottles, with a Freddie Mercury t-shirt.Smiling fit woman in gym gear sitting with a protein jar.Man in tank top holding a drill in a workshop.Man smiling, holding a supplement product, with more products on table.Man in Gold's Gym tank top smiling with a shaker bottle and protein tub.
Woman posing with a mug and wearing a retro-themed T-shirt against a red background.Man with headphones and headband holding a supplement container in a gym setting.Muscular man in a gym holding a supplement bottle and smiling.Smiling woman holding a protein powder tub and a plate with pancakes.Muscular man in gym smiling, holding supplement bottles, with a Freddie Mercury t-shirt.Smiling fit woman in gym gear sitting with a protein jar.Man in tank top holding a drill in a workshop.Man smiling, holding a supplement product, with more products on table.Man in Gold's Gym tank top smiling with a shaker bottle and protein tub.
Woman exercising with a bicep curl machine at the gym.Woman holding a beverage can by a lake railing.Muscular person flexing bicep, smiling, holding a supplement jar, wearing a cap and tank top.Muscular man holding a supplement container in a gym.Muscular man in a gym wearing a vintage-style t-shirt.Woman in red top holding dietary supplements in a kitchen.Muscular man in tank top flexing bicep, holding a supplement container, smiling.Smiling man in a cap holding a product next to his 'Old School' t-shirt.Man in a cap smiling while holding a supplement container in a kitchen.
Woman exercising with a bicep curl machine at the gym.Woman holding a beverage can by a lake railing.Muscular person flexing bicep, smiling, holding a supplement jar, wearing a cap and tank top.Muscular man holding a supplement container in a gym.Muscular man in a gym wearing a vintage-style t-shirt.Woman in red top holding dietary supplements in a kitchen.Muscular man in tank top flexing bicep, holding a supplement container, smiling.Smiling man in a cap holding a product next to his 'Old School' t-shirt.Man in a cap smiling while holding a supplement container in a kitchen.

320,000+ Happy Customers

Man flexing in the gym while taking a mirror selfie wearing an 'Old School' T-shirt.

Finally cracked the code

"Been lifting weights for years, but plateaued recently. Tried OSL's Turkesterone & Tongkat Ali, and BOOM! My lifts are going up again. Feeling stronger and more focused during workouts. Definitely recommend for anyone looking to break through a plateau."

- David S.

Verified Customer

Man posing in a gym locker room, wearing a graphic t-shirt and a headband.

GAME. CHANGEEER.

"Gym workouts leave me beat! Since taking this oldschoolabs supplement, I recover noticeably faster between sessions. Less soreness and more energy to tackle the next sess. Game changer!"

- Ali A.

Verified Customer

A man poses in a gym wearing a graphic t-shirt, beanie, and glasses.

Turkesterone

"Work and family life drains me. This turkesterone combo has given me the boost in energy throughout the day. Muscle wise my wife really noticed the different which is the whole point haha"

- Bryan W.

Verified Customer

Man lifting a barbell in a gym, wearing a white 'Old School Iron Club' t-shirt.

Surprised me

"Let's face it, things can slow down. This Turk and Ali product has been a lifesaver! My sex drive is back, and I feel more confident and energized overall especially with the muscle growth too. Highly recommend for men looking for a natural solution."

- Alex T.

Verified Customer

Man taking a gym selfie with workout equipment in the background.

OSL is the way

"I'm a natural lifter. This supplement is a great pre-workout for me. More stamina and endurance without any jitters or crashes like with pre workouts. Perfect for pushing my limits natty."

- Byron S.

Verified Customer

Shirtless man flexing his arm and holding a jar of supplement powder in a garage.

Finally cracked the code

"Been lifting weights for years, but plateaued recently. Tried OSL's Turkesterone & Tongkat Ali, and BOOM! My lifts are going up again. Feeling stronger and more focused during workouts. Definitely recommend for anyone looking to break through a plateau."

- David S.

Verified Customer

Smiling person holding a bottle of Turkesterone supplement in a gym.

GAME. CHANGEEER.

"Gym workouts leave me beat! Since taking this oldschoolabs supplement, I recover noticeably faster between sessions. Less soreness and more energy to tackle the next sess. Game changer!"

- Ali A.

Verified Customer

Man in blue shirt holding a container with a graphic design.

Turkesterone

"Work and family life drains me. This turkesterone combo has given me the boost in energy throughout the day. Muscle wise my wife really noticed the different which is the whole point haha"

- Bryan W.

Verified Customer

A person flexing muscles in a gym locker room.

Surprised me

"Let's face it, things can slow down. This Turk and Ali product has been a lifesaver! My sex drive is back, and I feel more confident and energized overall especially with the muscle growth too. Highly recommend for men looking for a natural solution."

- Alex T.

Verified Customer

Man taking a gym selfie with workout equipment in the background.

OSL is the way

"I'm a natural lifter. This supplement is a great pre-workout for me. More stamina and endurance without any jitters or crashes like with pre workouts. Perfect for pushing my limits natty."

- Byron S.

Verified Customer

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Back Guarantee

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From $85

Build Muscle for Just $1.16 a Day

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6 Bottles

Bottles of Old School Labs Turkesterone dietary supplement with Tongkat Ali.

343,840+ happy customers

$299.99

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90 Days Supply

Three bottles of Old School brand Turkesterone dietary supplement.

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$149.99

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60 Days Supply

Two bottles of Old School brand Turkesterone dietary supplement with Tongkat Ali.

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$99.99

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30 Days Supply

Supplement bottle labeled 'Old School Turkesterone with Tongkat Ali, 120 capsules'.

343,840+ happy customers

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FAQS

Are these ingredients safe?

How long will it take to see results?

Are there any side effects?

Can I stack this with other supplements?

Will this product get me banned in sports?

Is this a steroid?

Is there a guarantee this will work for me?

Why 250,000+ Customers Trust Shopping With OSL

Trusted By Legends

Trusted by: Samir Bannout, John Hansen, Mario da Silva and so many legendary bodybuilders just like you!

Satisfaction Guarantee

We'll either replace or provide a full refund, no questions asked. Your satisfaction is our top priority.

Natural Ingredients

Our products are manufactured in GMO certified facilities + our labels completely transparent

© 2024 Old School Labs

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Disclaimer: The statements on this page have not been evaluated by the FDA. Any products seen or mentioned are not intended to diagnose, treat, cure, or prevent any disease. Old School Labs® is a brand of Old School Labs LLC.