USP Labs | Jack3d

USP Labs | Jack3dOld school high stim kick with 1 3 scoop control for your energy level. USP Labs Jack3d is a high stim pre workout that hits fast and hard, with solid caffeine you can see on the label and a bunch of other energizers in a prop blend, plus some workout boosters that aren't fully listed. It's not one of those super clear, science perfect optionsit's old school stim power to get you amped and ready to crush. The main star is caffeine at 135mg per scoop,

Old-school high-stim kick with 1-3 scoop control for your energy level.

USP Labs Jack3d is a high-stim pre-workout that hits fast and hard, with solid caffeine you can see on the label and a bunch of other energizers in a prop blend, plus some workout boosters that aren't fully listed. It's not one of those super-clear, science-perfect options—it's old-school stim power to get you amped and ready to crush.

The main star is caffeine at 135mg per scoop, up to 405mg if you go full 3 scoops. Caffeine is a proven winner in supplements—it boosts endurance, cuts down how tired you feel, and helps you grind through sets. It works by blocking adenosine, which is a brain chemical that makes you feel wiped, so you stay sharp and push longer. One scoop gives a nice boost; three scoops is serious energy, especially with the extras.

Speaking of extras, there's 2-aminoisoheptane HCl, geranium extract, and yohimbe extract, all with hidden doses. These amp up the buzz beyond just caffeine—you feel more drive, heat, less appetite, and a quicker kick. The downside? No exact amounts, so it's harder to track what you're really getting and manage how your body adapts.

For performance, you've got creatine monohydrate, beta-alanine, and arginine alpha-ketoglutarate. Creatine helps your muscles recharge for explosive moves, beta-alanine fights that burn in tough sets by building carnosine (a buffer against acid buildup), and AAKG aims for better blood flow. Solid adds, but again, doses are hidden in the blend.

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

Key Highlights

• 135mg caffeine per scoop, up to 405mg at max—lets you dial in the buzz just right. Start with one to feel it out, go big for that intense push. Caffeine's backed by tons of studies for better workouts and less fatigue.
• Caffeine's the heavy hitter here, with real science showing it amps performance, wakes you up, and makes effort feel easier— that's why it's in all the top pre-workouts.
• Stacked stims make this stand out from plain caffeine stuff. On top of the caffeine, you get 2-aminoisoheptane HCl, geranium extract, and yohimbe extract for a sharper, more intense energy that hits harder.
• 1-3 scoop setup means you control the intensity. Super handy for high-stims, since your tolerance, size, what you ate, or daily coffee can change how it feels each time.
• Creatine monohydrate in the mix brings the king of strength supps—helps refill quick energy in muscles for those big efforts. Dose isn't listed, but it's a smart add.
• Beta-alanine throws in endurance help by boosting carnosine to fight acid buildup, so you can push more reps before the burn hits—if the amount's decent.
• Arginine alpha-ketoglutarate adds that classic pump vibe for better flow. Not as hot as citrulline these days, but it's old-school support for fuller workouts.
• Yohimbe extract with yohimbine amps the heat and drive, making sessions feel leaner and more fired up, especially fasted or when cutting calories.

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

Who Is This For?

• Seasoned stim fans who know their limits and want more edge than plain caffeine. 135mg per scoop plus extras build that mood-shifting, intense gym drive.
• Bodybuilders in grind mode needing buzz, less hunger, and better focus for long sets. The stim-heavy setup makes hypertrophy feel more dialed in on off days.
• Morning or early afternoon lifters with time to ride out the buzz without messing sleep. Up to 405mg caffeine plus more fits when you've got the day ahead.
• Intermediate-advanced folks who like 1-3 scoop flexibility over one-size-fits-all. Easy to test and tweak for your vibe.
• Gym rats prioritizing workout feel over perfect labels. It's about the intensity kick, not auditing every dose.
• Cutters wanting thermogenic, hunger-killing energy. Caffeine, yohimbe, and stims suit fasted or low-cal sessions better than pump-only.

How to Use

Mix 1 scoop in 6-12 oz water, down it 30 minutes before lifting to test the stim hit. With 135mg caffeine plus hidden extras, don't jump to 3 scoops. Build up if one feels good; vets might hit 2, pros only for full. Shaker helps mix, cold water tastes better. Empty stomach = faster kick, post-meal = smoother. No random stacking with other caffeine or stim stuff unless you're tracking. Save max for tough days to avoid tolerance. Keep it sealed, cool, and dry for best powder.

What to Expect

First 0-10 minutes: mostly waiting, hits faster empty stomach. 10-20: caffeine wakes you, maybe warmth or heart bump from the stack. 20-40: peak time—energy high, motivation up, easier to dive in. 40-90: stims keep the session rolling, more energy than pump focus. Days 1-7: figure out your scoop sweet spot. Weeks 2-4: beta-alanine and creatine might build if doses are solid, but label doesn't say.

Key Ingredients

• Caffeine — 135mg per scoop; 405mg at 3 scoops — Research-backed energy, alertness, and reduced perceived fatigue

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

Frequently Asked Questions