SKU: 23778793457

USP Labs | Jack3d Pre

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Description

USP Labs | Jack3d PreJack3d brings that high stim punch with 405mg caffeine at max scoops Jack3d Pre Workout is that classic high energy pre that puts intensity upfront. It stacks caffeine with other stims for a big nervous system boost, then adds in gym staples like creatine monohydrate, beta alanine, and arginine alpha ketoglutarateall in one big prop blend. So it's more of a throwback stim heavy pre for people who want raw energy and drive over fancy transparent

Jack3d brings that high-stim punch with 405mg caffeine at max scoops

Jack3d Pre-Workout is that classic high-energy pre that puts intensity upfront. It stacks caffeine with other stims for a big nervous system boost, then adds in gym staples like creatine monohydrate, beta-alanine, and arginine alpha-ketoglutarate—all in one big prop blend. So it's more of a throwback stim-heavy pre for people who want raw energy and drive over fancy transparent labels.

Caffeine is the only thing fully listed: 135mg per scoop, hitting 405mg at three scoops max. It's a proven booster for workouts—helps with endurance, makes fatigue feel less, and amps up your drive. It blocks adenosine in your brain to cut tiredness and sharpen you up, plus it can help power and stamina. At 405mg, that's a serious dose. Studies often go by body weight, like 3-6mg per kg, so for most people, the full hit lands right where it counts.

Arginine alpha-ketoglutarate is in there for pumps through better blood flow and nitric oxide, but the dose is hidden in the blend. Pumps from arginine need a good amount to really work, so without knowing, you can't be sure how strong it is here. Same deal with creatine monohydrate—it's top-tier for strength and power bursts, but you want 3-5g a day usually. Since it's mixed in with seven other ingredients, don't count on this as your main creatine source.

Beta

USP Jack3d Pre by USP Labs contains 135mg Caffeine, a clinical dose for training performance and pump.

Key Highlights

  • 405mg caffeine at three scoops makes this a real high-stim beast. You'll feel more alert, less wiped out, and ready to grind—caffeine is backed by tons of studies for that workout boost when dosed right.
  • 135mg caffeine per scoop lets you dial in the intensity. That's key for something this strong—start low to check how it hits you before ramping up.
  • The full serving packs a 12,435mg prop blend, keeping that old-school stim feel. Good for that big impact, but yeah, you won't see exact doses for creatine, beta-alanine, AAKG, DMHA, yohimbe, or schisandra.
  • DMHA adds that mood-lifting, sharp focus vibe that stim fans love. It makes Jack3d feel way more intense than just caffeine alone.
  • Yohimbe extract, standardized for yohimbine, brings a edgy, urgent energy. Feels more thermogenic and aggressive—great for tough days or cuts.
  • Creatine monohydrate backs up the stims with real performance help. It's awesome for strength and high-intensity reps, though we don't know if it hits the usual 3-5g mark here.
  • Beta-alanine helps with endurance by buffering acid in muscles. Perfect for long sets or intervals, but hidden dose means it's support, not a sure thing at clinical levels.
  • Arginine alpha-ketoglutarate aims for that classic pump feel. It's an old favorite for blood flow and fullness, pairing the energy with some physical gym gains.

USP Jack3d Pre by USP Labs contains 135mg Caffeine, a clinical dose for training performance and pump.

Who Is This For?

  • Seasoned high-stim fans who know their limits and want more than basic caffeine. 405mg max plus DMHA, yohimbe, and geranium make for that aggressive energy you feel right away.
  • Bodybuilders or physique guys grinding hypertrophy—needs that drive and intensity. Stims lock you in, while AAKG, creatine, and beta-alanine help with pumps and staying strong set after set.
  • Folks lifting after long days, needing a quick shift to beast mode. It delivers noticeable alertness and urgency when you're already beat.
  • Advanced lifters rotating pres, using this for heavy days. It's a high-stim pick in your lineup, not an everyday starter.
  • Guys who love old-school pres that hit hard with stims. Not pump or focus only—it's for feeling the pre work.
  • Cutters wanting appetite control and extra drive. Caffeine and yohimbe give that thermogenic edge in deficits.

How to Use

Start with one scoop in 8-12oz cold water, 20-30 minutes before lifting to test it. That window lets caffeine and stims ramp up right for your session. If it's good and you're stim-savvy, try two, then maybe three. Shake it well—dissolves better. Empty stomach hits faster and stronger; after food, it's milder. Don't mix with energy stuff or extra yohimbe unless you're tracking total stims and okay with it. Cycle high doses or save for big days to keep tolerance in check. Add separate creatine for reliable daily support. Store sealed, cool, and dry to avoid clumps.

What to Expect

First 0-10 minutes, it's settling in with that build-up vibe. 10-20 minutes, caffeine kicks: more alert, quieter mind, maybe warmth or energy from the stack. 20-40 minutes is prime time—strong drive, focus, ready to push. 40-90 minutes, it holds depending on dose and your tolerance, but it's made to last. Day 1-7, stims hit hard for intensity, maybe beta-alanine tingles if the dose is there. Weeks 2-4, any buildup from beta-alanine or creatine depends on your full intake hitting good levels. It's stim-first for now, longer perks tie into your routine.

Key Ingredients

  • Caffeine — 135mg per scoop; 405mg per 3 scoops — Research-backed energy and fatigue resistance for hard training

USP Jack3d Pre by USP Labs contains 135mg Caffeine, a clinical dose for training performance and pump.

Frequently Asked Questions

How much caffeine is in Jack3d Pre-Workout?

Jack3d provides 135mg caffeine per scoop and 405mg caffeine at the full 3-scoop serving. That is firmly in high-stim territory, especially because the formula also includes DMHA and yohimbe, which make the overall experience feel stronger than caffeine alone.

Is Jack3d beginner-friendly?

No, this is best viewed as an advanced-user pre-workout. Even though you can start at 1 scoop, the formula’s identity is built around a stacked stimulant profile that includes caffeine, DMHA, and yohimbe, which is more intense than what most beginners should start with.

Why does the label use a proprietary blend?

The active formula is listed as a 12,435mg proprietary blend at the full serving, which means the exact amounts of AAKG, creatine monohydrate, beta-alanine, DMHA, geranium extract, yohimbe, and schisandra are not disclosed. The total caffeine is disclosed separately, but you cannot verify whether the other performance ingredients hit research-backed doses.

Does Jack3d contain creatine?

Yes, creatine monohydrate is included in the proprietary blend. The limitation is that the exact amount is hidden, so if you want a guaranteed 3-5g daily creatine intake for strength and saturation benefits, you should still use a separate standalone creatine monohydrate product.

Does Jack3d contain beta-alanine, and will it make me tingle?

Yes, beta-alanine is part of the proprietary blend. Some users may notice the classic tingling sensation if the actual dose in their serving is high enough, but because the amount is not disclosed, the intensity of that effect can vary and the formula should not be assumed to provide a full clinical loading dose on its own.

What does DMHA do in this formula?

DMHA is used in high-stim pre-workouts to increase perceived energy, focus, mood, and training aggression. In Jack3d, it works alongside caffeine and yohimbe to create the harder-hitting stimulant feel that defines the product.

Can I stack Jack3d with other stimulants?

That is generally not advisable. Since the full serving already delivers 405mg caffeine plus DMHA and yohimbe, adding energy drinks, fat burners, extra yohimbe, or large amounts of coffee can increase the risk of jitters, rapid heart rate, anxiety, and sleep disruption.

When should I take Jack3d before training?

Most users do best taking it 20-30 minutes pre-workout. That timing gives caffeine and the rest of the stimulant stack enough time to begin absorbing so the session starts during the rising phase of the formula’s effects.

Is Jack3d a good source of pump ingredients?

It includes arginine alpha-ketoglutarate, which is intended to support blood flow and training pumps. However, because the formula is proprietary, its pump support is harder to evaluate clinically than a fully disclosed formula with known citrulline or nitrate dosing.

Should I use the full 3-scoop serving right away?

No. Because each scoop contains 135mg caffeine and the formula includes additional stimulants, the smart approach is to start with 1 scoop, assess tolerance across multiple sessions, and only increase if you clearly handle it well.

Shipping Notes
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Exchange/Return Notes
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SKU: 23778793457

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4.1 ★★★★★
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sleepywan
Draper, US
★★★★★ 3
OK for the price, but overall comfort is avergae
Size: 934-Z, Color: Mustard
Easy to put together, color (mustard) accurate to images, and while I understand this is not a high-end chair, I feel like it still needs to be rated for its quality. Pros: the seat cushions are fairly comfortable and it rolls well. Adjustable footrest is easy enough and mostly sturdy. Cons: For a tall office chair, it doesn't go up high enough. I actually had to lower my standing desk to sit at it, which then isn't where I want it when I'm standing now. It's also a bit wobbly. The seat area's attachment to the post isn't as solid as it should be for a tall chair, so while sitting, it does tend to lean/slope forward and wobble side to side. The lumbar support is not adjustable, so I'm not even really sure what it does. And the armrests are not very comfortable to use. Since they are hard plastic, they are just a bit too rigid to rely on for any comfort. They are basically there to hold on to when you're getting out of the chair.
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Reviewed in the United States on May 29, 2026
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Verified Purchase
Mel
Battle Creek, US
★★★★★ 4
Good Value for a Tall Chair
Size: 934W-Z, Color: White
I have received this chair just today and would like to give my first impressions of it. Height is super adjustable as well as the foot rest. My desk is very tall (~34 inches vs standard ~29 inches) and does not suit a standard height chair. This chair's height is enough to sit comfortably at mybut also still having adjustment to be even higher. Lumbar support is a manual adjustment that can be adjusted by sliding the lumbar piece up or down and it seems it can be tiled as well. No reclining feature or slight backrest tilt adjustment. I'm used to my chairs reclining so it feels a little awkward siting in a flat base and straight backrest. I feel like I'm sitting too forward or leaning forward slightly but is probably something I can get use to. Easy to put together and feels very sturdy. Plastic parts of chair are made from a really sturdy plastic, like playhouse plastic materials. Wheels roll around carpet easily. Mesh seems to be a strong material, though the mesh feels kind itchy on bare skin. Overall, I think this is a good chair to get if you're needing a tall chair for a good value and can sacrifice no backrest tilt.
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Reviewed in the United States on December 3, 2025
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Verified Purchase
Orion
Whiting, US
★★★★★ 5
Unexpectedly great chair - easily adjusting it to suit changing day-to-day needs makes it incredible
Color: Black Rhythm
The bottom line on this chair is that it is unexpectedly miraculous. After just 3 days, I've found it is unconventionally comfortable and the thing that makes it unique is that it renders adjusting it a normal part of its usage. I was originally like most folks, I presume - set the chair and then see how it does - but this chair demands that you use its intuitive controls to change things around as your needs change during the day. It is so easy to do, and that is where the magic is. I graduated from an excellent budget chair, the Alera Elusion high-back that is very adjustable. After over 5 years of pretty heavy usage, though, it was showing its wear, and I was really starting to feel the cushion every time I sat on it. I also started to experience some neck, shoulder, and lower back discomfort, and decided it was time to graduate to a better solution. I did not consider the Embody chair initially. At first glance, it looked a bit weird, and it was also on the expensive side, so I blew right past it. My initial starting point was the Aeron. I had used one at work years ago, and I recalled its adjustability. My body was much younger when I had used it, so I didn't experience its ergonomic benefits as well as I should have. I also looked at Steelcase models as they had some good reviews. Steelcase didn't fit my requirements as well as the Herman Miller solutions, so I gravitated strongly to the Aeron and was about to push the trigger on the order. A last second search on YouTube led me to the Embody and I was intrigued because of a couple of factors: the intuitiveness of the controls and the emphasis on the flexibility of the back and seat. The people that loved it REALLY loved it, and that, compounded with the Herman Miller return policy interested me enough to try it. So, here are some findings from the past 3 days: First, the seat is incredibly comfortable. The pixellated solution flexes with the weight that is applied to it, and it makes you feel as though you are suspended with no uncomfortable pressure points - this completely resolved the issue I was facing with the old Alera. It breathes well, is cool, and just invites you to sit down. The seat length adjustment required a little strength, but works well - you are not stuck with just the default length that might be either too small or too large. I had to adjust a couple of times to get just the right length. Once set, I don't foresee having to adjust it often. Second, I have found that I change the recline setting on the chair frequently. When I am typing, I set it so that it is relatively rigid, and when I am mostly reading, I set it so that it flexes more. There are several aspects to this - for typing, I set the tilt limiter to the position that allows the least possible movement or the next step down. I tighten the recline knob to keep me more upright, and adjust the back to a comfortable setting. It is all really easy, and the chair gives immediate feedback to ensure a good setting. When I am reading, I set the recline to setting 2 or 3 (more recline) and relax the recline a bit. That gives me the opportunity to lean back as needed and move around, with full support. If I am watching YouTube, I go to the most relaxed recline setting, and adjust the back to a less aggressive setting, and it is very comfortable. Setting/resetting all of the controls is responsive, easy, and intuitive. I never thought that this would be so required in a good seating experience. Third, I fiddled with the height of the chair to find the most comfortable setting. I use an iMovR standing desk and a Kinesis Advantage keyboard. I initially set the chair/desk combination so that my feet were flat on the ground and so that my forearms were angled downward slightly - supposedly more ergonomic. I ended up with some discomfort in my right wrist. Through experimentation, I found that raising my table or lowering the chair so that my forearms are angled a bit upwards got me in the correct wrist position for the keyboard, since it has wells. I am more upright with these settings, and am finding that my back is much more in contact with the chair, providing great and flexible support. This may not work well for folks using normal keyboards, but it is great with the Advantage. I also adjusted the height of the monitor so that it is a little higher than most ergonomic folks would recommend. I had found that by keeping the top of the monitor strictly at eye level as recommended, I was moving my head down to read the lower part of the screen, and this was causing some neck discomfort. My current setting is very comfortable. I have spent long hours in this chair over the past few days, and I am very impressed. My experience with the Alera and Aeron, both excellent chairs, is that they unwittingly promote the initial set and don't adjust paradigm, simply because adjustments, though technically possible, are not as integrated into the seating experience - you have to bend, get up, or twist unnaturally to do the adjustment. The Embody chair, on the other hand, encourages adjustments while you are in the seated position because the controls are few and easy to reach. This allows adjustments that correlate to the changing needs of our bodies throughout the day with immediate feedback because all of the controls are so well placed and simple to use. Flexibility and consistent support are inherently part of the design. No doubt that this chair is expensive, but with the generous 12 year warranty, this chair is about as good an investment you can make for your back and your general health if you spend significant time in a chair.
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Reviewed in the United States on May 16, 2020
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Verified Purchase
Kainoa68
Port Orchard, US
★★★★★ 5
The perfect office chair for me
Color: Berry Blue Balance
I’ve always wanted a good ergonomic chair for my home office but, since most of my time was spend in the office prior to COVID, I couldn’t really justify spending the money. When COVID shutdown the office and remote work meant spending 10 – 12 hours in my cheapy chair, it was time to look for the home office chair of my dreams. I really had three chairs in mind; the Herman Miller (HM) Aeron, the HM Embody and the Steelcase (SC) Gesture. Why did I settle on the HM Embody? • Seating Material – In the office, the AC is always cranked up so you don’t really get hot even when sitting for long periods of time, so breathability of the seat doesn’t seem to be as much of a problem. Normally, at home you don’t have the AC up as high so there is a higher chance that your butt and back of your thighs will get hot and sweaty. The Gesture is a more traditional office seat design with tight woven fabric on a foam cushion seating surface. You could image it getting hot. The Embody has what I would call an airframe. The seating material is a sort of open weave, porous fabric (Balance fabric) and stretched over a frame. This allows air to circulate freely through the seat. Aeron is similar but a mesh. In this area Embody was chosen because, if you are wearing shorts (no one sees below our chest on a vid call. . . right?) the mesh could be rougher on your skin and not be as comfortable. This turned out to be true. The Embody fabric was much softer to the touch, yet just as breathable as the Aeron mesh. Durability of the fabric is very good and after almost 2 years of daily use there is no signs of wear or color fading. • Ergonomic adjustments – All three chairs have similar seat adjustments with one exception. The Aero and Gesture have adjustable lumbar supports. The Embody doesn’t. It has a sort of lattice structure that has curvatures to cradle your back. You can adjust the angle of the backrest to come in closer to your back, thus giving more lumbar support (and upper back support) or away for less. How this would actually feel was a big question at time of purchase, but I can tell you that it works fine for me and provide the support I need. I also like how the backrest tapers towards the middle. This allows more freedom of movement of your arms and elbows. • Arms - The arms should be part of the ergonomics, but although the Embody has less adjustments here it still provides good ergonomic support. The arms on the Embody move up and down and narrower to wider. They don’t slide fore/aft or pivot in/away from you. The limited arm adjustments have not been a problem. I can comfortably use the armrests all day. If you want more arm adjustability, the Gesture offers more, but from my use of the chair in the office, some of it like the pivot function, just get in the way. • Seat structure – All three have solid, durable structures. I have not had any problems with the base, casters, or seat frame itself. I expect it to last a long time. Now, everybody’s body is shaped differently and that matters when choosing a chair. To my knowledge the Embody and Gesture only come in one size while the Aeron is available in three. I am assuming that the Embody is designed to fit people within a certain average height and weight range. If you fall outside of that, the comfort and fit won’t be as good. In that case, you might want to look at the Aeron which offers different height adjustment ranges, seat widths, etc. You might also be a borderline so consider this example, I’m on the shorter side and with the Embody at its lowest position, I am just barely at the correct knee position. It works for me, but I have no margin. However, if I have chosen the Aeron size A, I would have additional space to lower the seat, but would also have to consider the narrower seat body. To sum it up. The Herman Miller Embody was well worth the price paid. The seat is very comfortable, breathes well, offers great support and is built to last. I would recommend this chair to anyone who is looking for a premium quality ergo chair, but as you can see, there are others that are just as good and may even fit your better. I hope I have been able to give you a good comparison that can show you the difference between a few of them so you can determine what is most important to you. However, no review can ever replace in seat (no pun intended) experience. If at all possible, find place where you can actually try them out. This is my 100%, guaranteed, best recommendation!
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Reviewed in the United States on April 1, 2022
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Verified Purchase
Adam
Belleville, US
★★★★★ 1
Not for short people, as in 5'4"
Color: Black Rhythm
TLDR, this is a used so no warranty. You have to do some putting together, comes in a wide square box, came used that's for sure. Gas lift is wobbly and it costs $90 to replace, again no warranty with this chair buying from here. Not a good chair for someone short, and wearing 28 length pants, feet barely fully floor. Tends to make you lean back, so not a good work chair/competitive gaming chair. Lastly, not comfortable, too much ergonomics (doesn't feel ergonomic though, not for me), imagine trying to get work done and in discomfort, half of the discomfort is from the seat, so the discomfort is felt in the glutes. I'm around 5'4". My glutes are uncomfortable and the mid back is uncomfortable. The seat towards the end it has a lot of pressure so its not comfortable for glutes. It just lacks lower/mid back support, I sit as hips forward and upper back backwards it cannot be adjusted so the seat tilts forward which would probably help relive the discomfort in my glutes as well. My feet barely fully on the ground, so just to give idea 5'4", I wear 28 length pants. No tilt, so I'm sitting leaning backwards a lot, the seat edge curves up so uncomfortable on glutens, doesn't go down far enough either. Not a good chair for a short person, but there is hardly chairs for short people too, very frustrating. $1355, wobbly, still not a good chair for short person, some of the features are not present, forward tilt, the back piece does not go back down by itself either, it leans back with the seat. The back rest it only goes in from the very low back, it makes you lean back even more. Probably a gamer chair sitting leaning backwards, but I play video games too. If your playing competitively your not leaning back your comfortably forward. This chair doesn't have that. This is more an MMORPG chair than a competitive video game player chair. Or someone who does IT work and has to get done, seat forward comfortably, not leaning back. I'd list the pros, but the cons far outweigh the pros and I paid $1355 for this, there should be little to no cons. Chair is not comfortable so it doesn't matter what the pros are, its not comfortable for a short person. I need forward tilt on the seat. Leaning back the seat, the whole seat leans back, so the forward edge leans back too, meaning my feet are not fully/comfortably on the ground anymore.
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Reviewed in the United States on July 9, 2024

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