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Hi Tech | Stimerex-Es | 90 Tablets

High-stim thermogenic tablet with 150mg caffeine and 25mg synephrine.

$39.95 $69.95$0.44/serving
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Hand Packed Climate-controlled
150mg Caffeine Anhydrous
25mg synephrine Citrus Aurantium Extract
Undisclosed Theobromine
✓ Label Verified✓ No Prop Blends⚠ Review Advised
✓ GMP• Dairy-Free
150mg Caffeine — disclosed stimulant anchor
25mg Synephrine — thermogenic support
510mg Proprietary Blend — high-stim intensity
Tablet format — fast, convenient dosing
Strong appetite support — cutting-focused formula
Dairy-Free
🌱 Vegan 🌾 Gluten Free 🥛 Dairy Free 🫘 Soy Free
"“This one kicks in fast and gives that hard-hitting, locked-in energy when motivation is low. Great for cardio blocks or heavy training days when you want stronger drive and sweat output.”"
Verified buyer
Delivery Tech: hcl_salt
⚠️ Contains proprietary blend (9 ingredients)
1. Ephedra Extract (leaves)2. Senegalia Berlandieri Extract (leaves) [Yielding Phenylethylamine Alkaloids Including: Phenylethylamine, Methylsynephrine, N-Methyl-B-Phenylethylamine, N, N-Dimethylphenylethylamine]3. 2-Aminoisoheptane HCl4. Theobromine5. Citrus Aurantium Extract (25mg Synephrine) (fruit)6. Green Tea Extract (leaves)7. Yohimbe Extract (bark)8. Naringen (fruit)9. 6,7 Dihydroxybergamottin (fruit)
⚠️ Allergen Information +
Contains:
Manufactured in a facility that also processes:
SuppVault Summary

Stimerex-ES is a classic high-stim thermogenic tablet built for aggressive energy, urgency, and cutting intensity. It combines 150mg caffeine with a heavy proprietary stimulant matrix for a much stronger feel than the caffeine number alone suggests.

Great Fit

  • Experienced stim users in an aggressive cutting phase
  • Advanced dieters wanting strong pre-cardio energy
  • Users seeking urgency over a smooth feel
  • People wanting tablet-based fasted thermogenic support
  • Hard-training users needing appetite-control support
  • Fans of old-school hardcore fat burners
  • Experienced users who tolerate stacked stimulants
  • Morning users wanting intense dieting drive

Not Ideal If

  • Beginners or anyone new to stimulant supplements
  • Stimulant-sensitive users or people prone to jitters
  • Pregnant or nursing women, or anyone under 18
  • Anyone with cardiovascular, blood pressure, or anxiety concerns
  • Anyone stacking multiple high-stim products the same day
Have a question about this product?
When Pre workout
Time Avoid evening
⚠ ~150mg total caffeine per serving. contains ephedra extract. best taken before 2pm.
What You'll Feel
0-10 min
Easy tablet dosing fits fasted routines without mixing.
15-30 min
Initial alertness rise begins as caffeine takes hold.
💪
30-60 min
Thermogenic intensity, focus, and urgency become much more noticeable.
🎯
60-180 min
Strong training drive and appetite suppression are typically sustained.
🎯
3-5 hr
Energy gradually tapers, though stimulatory effects may linger.
1-4 weeks
Best results depend on diet adherence, timing, and tolerance management.

Deep Dive

Energy 2
Ca
Caffeine (anhydrous)
150mg
Th
Theobromine
Undisclosed
Fat burn 3
Ee
Ephedra Extract (leaves)
25mg
Ci
Citrus Aurantium Extract (25mg Synephrine)
Undisclosed
Ye
Yohimbe Extract
Undisclosed
Mood 1
Sb
Senegalia Berlandieri Extract
Undisclosed
Focus 1
Am
2-Aminoisoheptane HCl
Undisclosed
Anti oxidant 1
Gt
Green Tea Extract
Undisclosed
Absorption 2
Na
Naringin
Dh
6,7 Dihydroxybergamottin
Undisclosed
ENE: 2FAT: 3MOO: 1FOC: 1ANT: 1ABS: 2
Caffeine Anhydrous
Clinical Dose
150mg
Clinical range: 100-200mg
energy
Citrus Aurantium Extract
Clinical Dose
25mg synephrine
Clinical range: 10-50mg synephrine
fat burn
25mg extract
Amount not disclosed
Amount not disclosed
Theobromine
Under-Researched
Amount not disclosed
Clinical range: 250-500mg
energy
Amount not disclosed
Amount not disclosed
Amount not disclosed
Amount not disclosed

Caffeine (anhydrous)

150mg Dose
Daily Value
Disclosed Transparency
View full research →
1 Disclosed
1 Total
0 Trademarked
0 In Blends

Dose Audit

BASE Hi Tech | Stimerex-Es | 90 Tablets
$39.95
Standalone creatine monohydrateSTRENGTH

Stimerex-ES is all stimulation and thermogenic drive, but it does not include foundational performance support like creatine. Adding a daily creatine monohydrate product complements the stimulant energy with improved phosphocreatine availability for repeated high-intensity output.

Take creatine daily anytime; use Stimerex-ES 20-30 minutes pre-training or pre-cardio.

Electrolyte hydration formulaHYDRATION ELECTROLYTE

High-stim thermogenics often feel better when hydration is dialed in, especially during cutting phases or fasted cardio. Pairing this product with a solid electrolyte formula helps support fluid balance, training quality, and overall tolerance when body heat and sweat output rise.

Use electrolytes during training, cardio, or throughout the day; take Stimerex-ES beforehand.

Whey isolate or clear proteinPROTEIN

Fat burners do not preserve muscle on their own; diet does. A fast-digesting protein product pairs well with Stimerex-ES during cutting phases by supporting daily protein targets and helping protect lean mass while the stimulant formula supports adherence and output.

Use protein post-workout or between meals; take Stimerex-ES before training or cardio.

Stim-free pump or performance formulaPUMP

If you want better gym performance without stacking more stimulants, the right complement is a non-stim formula containing ingredients like citrulline, nitrates, or betaine. That adds blood flow and training quality to Stimerex-ES without compounding the stimulant load.

Take both 20-30 minutes pre-workout, avoiding any additional caffeine-containing products.

Hi Tech | Stimerex-Es | 90 Tablets80
$39.95
This Product
$/srv: $0.50
Tie

Both target hardcore thermogenic users, with similar appeal for stimulant-experienced cutters.

$/srv: $0.56
Them

It may appeal more to users specifically seeking a more classic, recognizable thermogenic profile.

$/srv: $0.61
Them

It edges out on category reputation among extreme fat burner shoppers.

$/srv: $1.00
This Product Wins

Stimerex-ES is more directly focused on thermogenic cutting support than general stim energy.

Clinical Dosing

Caffeine Anhydrous 150mg
Citrus Aurantium Extract 25mg synephrine
Theobromine Undisclosed
Full Product Description Article

Hi-Tech Pharmaceuticals Stimerex-ES is not a conventional daily energy tablet and it is not a modern “clean label” fat burner built around mild thermogenesis. This is a classic high-stim thermogenic tablet designed around one clear philosophy: combine multiple stimulant and adrenergic pathways to create a pronounced increase in alertness, training drive, and calorie-cutting intensity. The formula pairs 150mg caffeine anhydrous with a 510mg proprietary blend containing ephedra leaf extract, Senegalia berlandieri alkaloids, 2-aminoisoheptane HCl, theobromine, Citrus aurantium yielding 25mg synephrine, green tea extract, yohimbe extract, naringin, and 6,7-dihydroxybergamottin.

The fully disclosed caffeine dose matters because it gives you one concrete anchor for the formula’s stimulant load. At 150mg, caffeine anhydrous is enough for clear alertness and performance support on its own, but in Stimerex-ES it functions more like the foundation under a much more aggressive stimulant stack. Caffeine antagonizes adenosine receptors, reduces perceived fatigue, and reliably sharpens wakefulness. In this formula, the user experience is likely to feel stronger than a typical 150mg caffeine product because caffeine is not acting alone.

Citrus aurantium provides 25mg synephrine, a dose commonly seen in thermogenic formulas targeting adrenergic-driven energy expenditure and appetite control. Synephrine is used for its stimulant-like support of metabolic rate and perceived energy, especially in cutting phases. Ephedra leaf extract is included at 25mg extract, but the label does not disclose active alkaloid standardization, which limits precise dose interpretation. That said, its inclusion signals the formula’s old-school thermogenic intent.

Senegalia berlandieri extract is listed as yielding multiple phenylethylamine alkaloids including phenylethylamine, methylsynephrine, N-methyl-beta-phenylethylamine, and N,N-dimethylphenylethylamine. These compounds are used for fast-onset mood elevation, drive, and central stimulation, but the lack of disclosed dose means you cannot benchmark them against any validated research range. 2-Aminoisoheptane HCl is also included at an undisclosed amount and is typically used for a stronger, more prolonged stimulant feel than caffeine alone.

Theobromine adds a different character to the stimulant profile. Research on isolated theobromine is still emerging, but it is commonly used to provide a smoother, longer energy curve than caffeine alone. It also appears to have complementary vascular effects that can offset some of caffeine’s tighter feel. Green tea extract likely contributes additional thermogenic support and polyphenols, while yohimbe extract adds another layer of adrenergic stimulation often used specifically in aggressive fat-loss formulas.

Naringin and 6,7-dihydroxybergamottin are included as bioflavonoid-type compounds often used to alter metabolism and extend the feel of other actives by influencing enzymatic breakdown. That strategy makes formulation sense in a high-stim tablet intended to hit hard and last, but again, the proprietary blend prevents dose-level scrutiny.

The synergy here is straightforward: caffeine provides the core wakefulness signal, synephrine and yohimbe push thermogenic/adrenergic intensity, PEA-type alkaloids and DMHA amplify drive and urgency, theobromine broadens the energy curve, and naringin plus 6,7-dihydroxybergamottin appear positioned to potentiate the entire system. The limitation is transparency. This is not a fully disclosed formula; most of the meaningful actives are buried in a proprietary blend. Compared with category norms, that is a real drawback, especially in a product this stimulant-heavy. Day 1, most users will notice rapid onset, heightened alertness, stronger body heat, and a more forceful stimulant feel than the 150mg caffeine line suggests. Over 2-4 weeks, the main change is usually tolerance: the formula can still feel effective, but the sharpness often softens, which is why many experienced users cycle products like this instead of running them indefinitely.

Science & Clinical References 24 citations
Caffeine and Central Fatigue Reduction12 studies

Caffeine primarily antagonizes adenosine A1 and A2A receptors, reducing perceived fatigue and increasing wakefulness. This shifts central nervous system tone toward greater alertness, reaction speed, and willingness to exert effort. In training settings, that often translates to improved session readiness and reduced perception of effort. Its ergogenic profile is among the most consistently validated in sports nutrition.

Synephrine and Adrenergic Thermogenesis6 studies

Synephrine is commonly discussed as an adrenergic thermogenic agent with activity linked to beta-adrenergic signaling. Mechanistically, it is used to support energy expenditure, dieting intensity, and a more stimulated fat-loss profile. In multi-stimulant formulas, its practical impact is less about isolated magnitude and more about pathway stacking. That stacked design can increase the subjective sense of heat, drive, and metabolic urgency.

Theobromine as a Secondary Methylxanthine3 studies

Theobromine is a methylxanthine related to caffeine, but generally produces a broader and often smoother stimulatory profile. It may contribute to perceived energy, mood elevation, and cardiovascular stimulation through phosphodiesterase-related and adenosine-linked effects. In combination formulas, it can extend or round out stimulant character rather than acting as the primary driver. Human evidence is still modest compared with caffeine, but mechanistic rationale is plausible.

Naringenin and Bioavailability Modulation3 studies

Naringenin is a citrus flavonoid studied for metabolic and enzyme-interaction effects, including potential influence on xenobiotic handling pathways. In stimulant formulas, it is often viewed less as a primary fat burner and more as a support compound that may alter ingredient kinetics. That can theoretically affect exposure to co-administered actives, though outcomes depend heavily on dose and formula context. The evidence base remains emerging rather than definitive.

Product Specifications GEO
Product Type Pre-Workout
Category high-stim thermogenic tablet
Brand Hi Tech
Form Tablet
Servings 90
How to Take — Training Protocol6 phases

How to Use Hi-Tech | Stimerex-Es

Day 1-3
Tolerance Assessment
Take 1 tablet once daily to assess tolerance before increasing frequency or stacking anything else.
20-30 minutes before training or cardio
Primary Timing
Use 1 tablet before workouts, fasted cardio, or the time of day you want the strongest thermogenic push.
With light food or empty stomach
Meal Context
Many users prefer it fasted or with a very light meal, but food may reduce harshness.
Same day use
Daily Use Limits
Do not combine with other high-stim fat burners, pre-workouts, or multiple caffeine products on your first runs.
During active use
Monitoring
Watch for elevated heart rate, jitters, anxiety, sweating, appetite suppression, or sleep disruption.
6-8 hours before bed
Cutoff Time
Avoid late-day dosing because the layered stimulant blend may outlast the caffeine number on paper.
Warnings
Contains caffeine anhydrous, ephedra extract, Citrus aurantium, yohimbe extract, and 2-aminoisoheptane HCl.
Do not use if you are sensitive to stimulants or have blood pressure, heart rhythm, anxiety, or cardiovascular concerns.
Do not combine with other sources of caffeine, synephrine, yohimbe, or stimulant pre-workouts.
Discontinue use if you experience chest discomfort, dizziness, severe jitters, or unusual heart palpitations.
Cycling: Because this is a high-stimulant thermogenic, many experienced users cycle it for several weeks, then take a stimulant break to manage tolerance.
All Questions About Hi Tech | Stimerex-Es | 90 Tablets 10 Q&A
How much caffeine is in Stimerex-ES per tablet? +
Each tablet provides 150mg caffeine anhydrous. The important context is that the formula also contains multiple additional stimulants inside a 510mg proprietary blend, so the real-world intensity feels stronger than a standalone 150mg caffeine product.
Is Stimerex-ES a pre-workout or a fat burner? +
It is best classified as a high-stim thermogenic fat burner that can also be used before training or cardio. It does not contain classic pre-workout performance ingredients like citrulline, beta-alanine, or creatine; instead, it focuses on stimulant drive, thermogenesis, and dieting intensity.
What makes this formula feel stronger than the caffeine number suggests? +
Beyond the 150mg caffeine, the proprietary blend includes 25mg synephrine, ephedra extract, yohimbe extract, 2-aminoisoheptane HCl, Senegalia berlandieri alkaloids, and theobromine. Those ingredients create a layered stimulant effect that most users perceive as considerably more aggressive than caffeine alone.
When should I take Stimerex-ES? +
Take 1 tablet about 20-30 minutes before cardio, training, or the time of day when you want the strongest thermogenic push. Many experienced users prefer it before fasted cardio, but stimulant-sensitive users may tolerate it better with a light meal.
Can I stack Stimerex-ES with coffee or pre-workout? +
In most cases, no. Since the formula already combines 150mg caffeine with several additional stimulants, stacking it with coffee, energy drinks, or a full stim pre-workout can push the experience into uncomfortable territory very quickly.
Is the formula fully transparent? +
No. Caffeine is disclosed at 150mg, and the formula confirms 25mg ephedra extract plus 25mg synephrine within a 510mg proprietary blend, but most of the important actives inside that blend do not have individual doses listed.
What does theobromine add to a formula like this? +
Theobromine is often used to create a smoother, more extended stimulant curve than caffeine alone. In Stimerex-ES, it likely helps broaden the energy feel so the formula is not just an immediate spike and drop.
Who should avoid this product? +
Beginners, stimulant-sensitive users, pregnant or nursing women, anyone under 18, and anyone with cardiovascular issues, high blood pressure, anxiety disorders, or stimulant-related medication interactions should avoid it. This is an advanced high-stim product, not a general wellness supplement.
Will I build tolerance to Stimerex-ES? +
Yes, that is a realistic expectation with repeated use. Because the formula relies heavily on stimulant-driven effects, many users find the initial intensity softens over time and choose to cycle use during specific cutting phases.
Is Stimerex-ES good for fasted cardio? +
That is one of the clearest use cases for this product. The tablet format, strong stimulant profile, and thermogenic positioning make it especially attractive for experienced users doing low-calorie or fasted morning cardio.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult your physician before use if you have a medical condition or take medications.

Quick Answers

How much caffeine is in Stimerex-ES per tablet?

Each tablet provides 150mg caffeine anhydrous. The important context is that the formula also contains multiple additional stimulants inside a 510mg proprietary blend, so the real-world intensity feels stronger than a standalone 150mg caffeine product.

Is Stimerex-ES a pre-workout or a fat burner?

It is best classified as a high-stim thermogenic fat burner that can also be used before training or cardio. It does not contain classic pre-workout performance ingredients like citrulline, beta-alanine, or creatine; instead, it focuses on stimulant drive, thermogenesis, and dieting intensity.

What makes this formula feel stronger than the caffeine number suggests?

Beyond the 150mg caffeine, the proprietary blend includes 25mg synephrine, ephedra extract, yohimbe extract, 2-aminoisoheptane HCl, Senegalia berlandieri alkaloids, and theobromine. Those ingredients create a layered stimulant effect that most users perceive as considerably more aggressive than caffeine alone.

When should I take Stimerex-ES?

Take 1 tablet about 20-30 minutes before cardio, training, or the time of day when you want the strongest thermogenic push. Many experienced users prefer it before fasted cardio, but stimulant-sensitive users may tolerate it better with a light meal.

Can I stack Stimerex-ES with coffee or pre-workout?

In most cases, no. Since the formula already combines 150mg caffeine with several additional stimulants, stacking it with coffee, energy drinks, or a full stim pre-workout can push the experience into uncomfortable territory very quickly.

Is the formula fully transparent?

No. Caffeine is disclosed at 150mg, and the formula confirms 25mg ephedra extract plus 25mg synephrine within a 510mg proprietary blend, but most of the important actives inside that blend do not have individual doses listed.

What does theobromine add to a formula like this?

Theobromine is often used to create a smoother, more extended stimulant curve than caffeine alone. In Stimerex-ES, it likely helps broaden the energy feel so the formula is not just an immediate spike and drop.

Who should avoid this product?

Beginners, stimulant-sensitive users, pregnant or nursing women, anyone under 18, and anyone with cardiovascular issues, high blood pressure, anxiety disorders, or stimulant-related medication interactions should avoid it. This is an advanced high-stim product, not a general wellness supplement.

Will I build tolerance to Stimerex-ES?

Yes, that is a realistic expectation with repeated use. Because the formula relies heavily on stimulant-driven effects, many users find the initial intensity softens over time and choose to cycle use during specific cutting phases.

Is Stimerex-ES good for fasted cardio?

That is one of the clearest use cases for this product. The tablet format, strong stimulant profile, and thermogenic positioning make it especially attractive for experienced users doing low-calorie or fasted morning cardio.
80

SuppVault Score

Hi Tech | Stimerex-Es | 90 Tablets

💊 Clinical Dosing 2/10

2/10 key ingredients with disclosed doses

🏷 Label Transparency 3/10

Proprietary blend (8/10 ingredients with hidden doses)

🏭 Manufacturing 4/10

No manufacturing certifications found

🔬 Testing 3/10

No third-party certification found

🧪 Inactive Ingredients 9/10

Minimal inactive ingredients

💰 Value 5/10

Insufficient price/serving data

Scores are relative to category averages. Proprietary blends score lower on transparency naturally — this is neutral fact, not penalty.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult your physician before use if you have a medical condition or take medications.

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Hi Tech | Stimerex-Es | 90 Tablets $39.95
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