We test and review fitness products based on an independent, multi-point methodology. If you use our links to purchase something, we may earn a commission. Read our disclosures.

Whether you’re looking for sleep supplements or vitamins, you can use our exclusive Onnit coupon code to save money on your next purchase. 

Supplements can be a tricky world to navigate, especially since many companies make dubious claims about their products’ effectiveness. Onnit, though, has received positive reviews from medical professionals and their supplements have been researched in peer-reviewed journals, which have found the supplements do what they claim to. 

If you’re looking for an Onnit coupon code to save money on your next purchase, we have one just for our readers. Plus, we’ll give you other ways you can save money during your next supplement order.

Discounts on Onnit Products

When it comes to helping you save money on Onnit products we’re…well, on it. 

Invite Friends: Get $20 off your next Onnit purchase for every friend you refer. (Each friend must order $35 or more in merchandise for you to receive a credit.) 

Subscription Program: Get 15% off a supplement by putting it on a subscription plan. 

Military and First Responders: Veterans and active-duty service members, along with first responders, get 15% off their orders. 

How to Apply the Onnit Coupon Code  

Step One: At the top left of Onnit’s website, click “Invite Friends.” Enter your email address, then theirs to send them a referral code. 

Step Two: On each product page, you can click whether you want to put a supplement on a subscription plan ranging from every week to every 90 days. 

Step Three: Military or first responders? Verify your status through ID.me and your discount will be automatically applied at checkout.

When Do Onnit Products Go on Sale?

Onnit has several big sales and promotions around major holidays. Our holiday sales pages keep track of all the best deals you need to know about. 

What We Love About Onnit 

Iron Man Kettlebells
Onnit Iron Man Kettlebells
Onnit Iron Man Kettlebells

Introducing the Marvel Hero Elite Iron Man Kettlebell. A fully-functional 40lb kettlebell artistically sculpted after Iron Man's iconic helmet. This kettlebell is designed to help you build strength, increase mobility, and potentially increase your chances of dating a supermodel.These kettlebells have been meticulously sculpted to match the iconic Iron Man helmet and are guaranteed to turn heads whether in the gym or on the shelf.Onnit Brand Kettlebells are made with a high quality, chip-resistant coating that's strong enough to stand up to even the most epic workouts.Kettlebell training combines explosive strength with muscular endurance to provide an efficient and athletically optimized full body workout. And while these kettlebells look amazing, they are built to perform. Designed from the ground up with a focus on functionality first, this helmet has been engineered to meet functional standards that would impress Mr. Stark himself.

Fun fact: Supplements aren’t required to undergo any kind of testing, even though many make outrageous claims that they can improve your health or make you stronger. Onnit backs their claims up with clinical studies and tests all of their products for banned substances. It shows Onnit is dedicated to providing quality supplements to their customers. 

Beyond that, they also produce some unique fitness items. How often do you see a kettlebell shaped like an orangutan? We actually recommend them for beginners in our best kettlebells roundup. 

Why Buy From Onnit? 

We can’t stress enough how great it is that Onnit takes the time, effort, and money to do clinical studies on their supplements. You should always know what you’re putting in your body, and supplements are no different. 

Further reading

Rogue Echo Dog Sled Released Cover Image
Rogue Echo Dog Sled Released

The Rogue Dog Sled 1.2 is one of the best sleds on the market, however, for most people it's overpriced and over-built. This is where the Rogue Echo Sled comes in. A beefy sled at a great price. Read more

Should You Bolt Down Your Squat Rack? Maybe, Says an Expert Cover Image
Should You Bolt Down Your Squat Rack? Maybe, Says an Expert

Should you bolt down your squat rack? Our personal trainer dives in to when you should, and when you may not have to. Read more

Rogue Deep Dish Plates Review: USA Made, Historically Accurate Weight Plates Cover Image
Rogue Deep Dish Plates Review: USA Made, Historically Accurate Weight Plates

The Rogue Deep Dish Platesare the first made in America cast iron weight plate that Rogue Fitness has released. Harkening back to York Milled Plates, the Rogue Deep Dish Plates are accurate, priced extremely well, and look as good as they perform on a barbell for squats, deadlift, bench, and any other movement you’d like to perform. If you like the aesthetics, they’re one of the best value iron plates available. Read more

Best Organic Protein Powder (2023): Natural Reviews & No Artificial Claims Cover Image
Best Organic Protein Powder (2023): Natural Reviews & No Artificial Claims

Don’t be misled by artificial reviews—our nutrition experts dug deep into the data to provide you with the best organic protein powder options. Read more