Description
Flavor
Tart lemonade meets ripe mixed berries—lightly sweetened with monk fruit and organic stevia. No sugar alcohols, dyes or harsh aftertaste.
Inside the Blend
How to Use
- 1
Mix. Blend 1 serving with 10–16 oz cold water and shake well.
- 2
Time. Drink 15–30 min pre-training. New to THC? Start with ½ serving.
- 3
Train. Lock in the mind–muscle connection and go to work.
Testing
Every batch is third-party tested by SC Labs (CA). COAs available. See testing.
Shipping
Free on orders over $100. Flat rate $7.
Returns
Transparent 30-day return & refund policy. Learn more.
FAQ
Hemp-Derived vs. Cannabis-Derived THC—what’s the difference?
None. Δ9 THC is Δ9 THC, regardless of whether it comes from hemp or marijuana. The chemical structure is identical and interacts with your body in the exact same way.
Will it make me itchy?
No. The itchy sensation often associated with pre-workout comes from beta alanine. We don’t include it.
Can I stack it with creatine?
Absolutely. This pre-workout stacks well with creatine and other common supplements.
Will I fail a drug test?
Our hemp-derived Δ9 THC is within federally legal limits and third-party tested for purity. However, consuming any hemp-derived cannabinoid could produce a positive result. Use responsibly.
lyrik.peacock (verified owner) –
Honestly one of the best products I’ve ever come across. I noticed a better mind to muscle connection during my workouts and felt pumped the entire time.
hnguyen.blmn (verified owner) –
Never liked using THC products before the gym but this THC pre-workout surprisingly works great! Good energy and kept me relax and focused during my session and made it more fun.
connorreedwork (verified owner) –
Been a thc workout enthusiast for a few years now but was always worried about upsetting other gym goers with with the classic thc delivery method smell. 420 Flex has come up with the ultimate solution. From the sweet easy-to-drink taste to the almost electrifying pump, this is truly a stellar product. Will be ordering again soon!
kellykegg (verified owner) –
Best product i have used yet, if you gym bros don’t like to go to the gym smelling, or the obvious tell sign of eyes getting red, try 420flex! Nothing over the top, enough to ride through the lift or whole session, GAME CHANGER!!!
Quinn O (verified owner) –
Super pumped hearing about 420flex and it lives up to the hype
ljackson71601 (verified owner) –
420Flex had me so dialed I went out of my way to do leg day and didn’t even switch to arms halfway through, 5 stars.
aidenks01 (verified owner) –
Fcking love this product. Two of my favorite things in one easy package. Taste is great.
Dusty Demenge (verified owner) –
Proper amount of caffeine and an enhanced recovery period following any lift. Night and day difference when it comes down to simply moving weight around vs actually FEELING each movement. 5 out of 5!
branden.bergren (verified owner) –
Absolutely love 420Flex it’s the perfect recipe to get me in the zone for working out. Will be buying again!
Drew Brasiel (verified owner) –
The 420 flex THC infused pre-workout is an awesome product! I enjoyed it over the weekend while sitting by the pool and during a round of golf and felt great. It’s a great if you want to feel the stress relief of THC while still feeling full of energy. Would highly recommend!
charlieaverill2000 (verified owner) –
I liked the idea and thought I’d try it, good flavor and the mix of the well balanced pre-workout with the mild level of THC made for a good lift. Excited to see more flavors and maybe more THC strength levels
adamrausch101 (verified owner) –
If you’re not sure yet… just get it. You won’t be disappointed!! I’ve used a ton of different Pre-Workout brands in the past and this product surpasses all the top brands by a mile! Very impressed with their mix and innovative product.
grifguy (verified owner) –
Finally have a product that I can take before working out to feel good and not have problems with my breathing because I didn’t have to smoke before.
So impress with my focus in the gym now as well.
lauairodrigues (verified owner) –
This got me really excited since I first heard about it. I’ve tried different pre-workouts and never really liked any of them. But the THC infusion in this one is just perfect. It gives me all the energy I need while also making me feel relaxed and helping with muscle recovery. I wouldn’t think twice to buy it
adamjameslindberg (verified owner) –
Loved it! Kept me focused and motivated! Will definitely be buying again !
Mason Engler (verified owner) –
I love this product! The mind-muscle connection is unreal! I use it while I’m climbing, and it locks you TF in! I feel like I’m floating through the problems I climb. It kicks in faster than an edible, and the high isn’t overwhelming at all. I definitely recommend trying this out!
bradenwolf10 (verified owner) –
Pre-workout usually makes me feel off, but the combination of caffeine with the THC not only kept the experience smooth, but really helped me stay locked into my workouts longer!
Anthony Mixon (verified owner) –
I feel great while using 420 flex. It’s the perfect mix of energy and focus. It all around just makes me feel locked in and ready to kill a workout
Jonathan Andrade (verified owner) –
Perfect balance for a workout. Enough fuel to propel you to a great workout and just enough TH* to make it feel easy! Highly recommend for the active stoner.
Bianca Vesco (verified owner) –
420flex was the perfect pre wourkout and I don’t even like most pre workouts! It gave me energy without the buzz and it gave me focus without the anxiety. Very big fan. 10/10 would recommend.
Jasmine Bedbury (verified owner) –
I love this flavor and product it’s so yummy and effective!
Zach Smith (verified owner) –
Great flavor!
Elizabeth Kirk (verified owner) –
Awesome team. Who are putting together great product! Flavor is wonderful, and I love the idea of the different options available in the future!
Theresa Peterson (verified owner) –
Such an awesome product! Delicious and refreshing, clean ingredients. A nice buzz with a boost of energy. I love that it’s a super portable, easy to use drink mix, perfect for camping!
Nature Young (verified owner) –
Effective and good flavor 👌🏾. Flavor is refreshing and goes down easy. Felt super energized and didn’t get too high from it.
Vicki Carver (verified owner) –
I love the product. I have ANS dysfunction and this helps during exercise. I tried it during a triathlon. Worked great.
Matt Judkins (verified owner) –
I ran again after trying 420flex. I hadn’t run in 6 years but had been trying. Two miles in 20 minutes. It cuts the veneer of anxiety and overthinking, boosts energy, and has little aftereffect.
williamjohniverson (verified owner) –
The idea threw me off right away but my buddy put me on. Hands down the best pre workout I’ve used. Great flavor, great results, highly recommend.
Jonathan (verified owner) –
Rocket fuel in a pouch! Sipped on 420Flex before my trail race and earned a spot in the Top 3. Might not have been at the top of the podium, but I was the highest runner out there.
Charles Smith (verified owner) –
Great focus, pump and intensity.
Briana (verified owner) –
Good products & friendly service
Jimmy (verified owner) –
This is a great product for those of you looking for a clear mind, and focus during your lifts. While still giving you the edge to push to failure with maybe a few extra forced reps that you’ll feel good about.
Take it before you lift, cardio or like I do.. before I train my personal clients. As I’ve found it’s given me cognitive support to answer questions about fitness pretty rapidly.
All in all it’s a solid product without the stim making it available to take at anytime during your day!
Cam (verified owner) –
I’m a big fan of this mix. The dosing per serving is perfect in my opinion, doesn’t make you feel faded out of your mind, which was a problem for me with other methods. I would appreciate if there were a non stim version as I’m not a big caffeine fan, but the 150mg dose is not horrible. Overall, I really enjoy this pre!
mgretzlock20 (verified owner) –
I was a bit skeptical – I really enjoy my smoke before a lift. But everything in this formula is spot on, the energy, mind muscle connection, and the flavor. Across the board 5 starts, truly meant for the highest achievers.
Kacey (verified owner) –
I absolutely love this product! I already was trying to find the right mixture of caffeine and thc, but this takes all the guess work out completely! I also love the fact that they’re in an on the go packet. It’s so convenient and works so well!
CJ (verified owner) –
Really good amount of caffeine that helps give me the boost I need in the mornings.
The THC really helps quiet my typically noisy brain so I can really lock in to my workout.
Overall very pleased with how it makes me feel, and I intend to keep this in my wellness tool belt!
Kathleen Jimenez (verified owner) –
I tired this product 3 times before give the review i want to give you guys full details
1st even if i wasnt in the mood mentally once i put the headphones on and the volume changed frequency i felt the thc hit my mind was stress free and clear
2 i felt the mind muscle connection and my run/workout seemed effortless and natural like it should be not intense or overloaded
3 my breathing was in sync with my body my lungs new how to be comfortable in the intensity i was building
Overall my experience in talking this dont be timid by the 5% its tue perfect dose to get you activated and pay your dues 💪🏽
Great product 10/10
James Biggs (verified owner) –
Absolutely the best workouk product I’ve ever used. I’m very careful about the products I use and what I put into my body, 420 flex gave me no gitters no weird preworkout feeling just focus, and the most epic workouts I’ve had to date.
Eric (verified owner) –
Flavor is delicious and has all the essentials to fuel and replenish for my runs!
Jack Nyge (verified owner) –
fireeee
Courtney Grasby (verified owner) –
I didn’t feel as sore the next day and I felt more focused!
Hilburn Sparrow (verified owner) –
This product is amazing- great burst of energy and focus.