Fully disclosed high-stim thermogenic with 500mg max caffeine
Metabolic Nutrition Synedrex Powder is a high-stim thermogenic for pre-contest prep. It mixes strong brain buzz, fat-loss support from adrenaline-like effects, and focus boosters in a powder with everything listed out—no hidden blends. This isn't a pump pre-workout or a starter fat burner. It's a bold energy and heat system for people chasing real drive, more body warmth, less hunger, and solid workout power during a cut.
The main player is caffeine anhydrous at 250mg per scoop, up to 500mg with 2 scoops. Caffeine is a go-to for quick energy in supplements—it boosts alertness, makes you feel more pumped, and helps performance by blocking adenosine receptors (which make you tired) and ramping up adrenaline signals. At 250mg, you'll notice it if you're used to stims; 500mg is next-level and not for everyone.
Next up is 2-aminoisoheptane, aka DMHA, at 75mg per scoop and 150mg at 2 scoops. Folks in the know aim for 150-200mg, so the full dose hits the lower end of that sweet spot. DMHA releases and blocks reuptake of brain chemicals like dopamine and norepinephrine, giving a urgent, feel-good rush that's stronger than caffeine alone. Real studies are slim, so watch your heart rate.
Eria Jarensis extract comes in at 100mg per scoop, 200mg at 2 scoops. This phenethylamine-style stim lifts mood, sharpens focus, and kicks in fast for that wired CNS feel. It teams up with caffeine and DMHA for the 'amped but motivated' vibe that high-stim fans love. Yohimbine HCl at 3mg per scoop, 6mg at 2 scoops, is one of the
Key Highlights
- 250mg caffeine anhydrous per scoop, 500mg at the full 2-scoop max. This gives Synedrex a real kick for energy, with solid perks like better alertness, easier effort, and stronger workouts from blocking tiredness signals and boosting adrenaline.
- 150mg DMHA at full serving fits the usual 150-200mg range people go for. DMHA brings a tougher dopamine and norepinephrine push than just caffeine, so advanced users say these formulas hit harder and lift your mood more.
- 200mg Eria Jarensis at full serving boosts the mood and focus side. In the gym, this makes the energy feel driven and rewarding, not just basic caffeine buzz.
- 6mg Yohimbine HCl at 2 scoops is a real dose, not filler. It blocks alpha-2 receptors to amp up norepinephrine and fat breakdown, especially fasted, but check how you handle it first.
- 2.4mg alpha yohimbine at full serving adds extra adrenaline punch. That's why this feels stronger than the caffeine amount suggests—start low.
- Fully disclosed doses set this apart. No prop blends hiding stim levels—you see exactly how much caffeine, Eria Jarensis, yohimbine, alpha yohimbine, and DMHA you're getting.
- Naringin is a smart add, not just for show. It blocks enzymes like CYP3A4 and P-glycoprotein to slow how fast some stuff clears out, so the stim ride lasts longer instead of crashing quick.
- Huperzine A brings brain support to the mix. It stops acetylcholinesterase (an enzyme that breaks down acetylcholine), so you get sharper focus and better lock-in during sessions.
Who Is This For?
- Bodybuilders in a deficit needing workouts to stay strong. 250mg caffeine per scoop, Eria Jarensis, DMHA, and yohimbine deliver sharp energy, heat, and hunger control when prep tiredness creeps in.
- Seasoned fasted-cardio fans who like yohimbine stuff. Yohimbine HCl, bitter orange, grains of paradise, and caffeine build that adrenaline vibe for low-cal morning grinds.
- High-stim pre fans who want urgency and aggression over pumps. Synedrex isn't about nitric oxide—it's for feeling on, locked, and fired up.
- Dieters whose motivation tanks first. L-DOPA, huperzine A, caffeine, and Eria Jarensis boost focus and drive for cuts where head games limit you.
- Gym vets switching from caps to powder for better control. One scoop starts strong at 250mg caffeine, ramp to 2 if it fits.
- Folks who hate prop blends. This shows exact doses in a category full of secrets, key for stims like caffeine, yohimbine, and DMHA.
How to Use
Mix 1 scoop in 8-12 oz cold water 20-30 minutes before training or cardio. Timing counts because caffeine, yohimbine HCl, DMHA, and Eria Jarensis kick in fast—you want them going when you start. Don't jump to 2 scoops unless you're good with heavy stims and yohimbine. Fasted? Expect quicker, stronger hit; sensitive stomach? Light meal smooths it. Use a shaker for even mix, cold water tastes better. Skip stacking with coffee, other thermogenics, or yohimbine unless you've checked totals. Tolerance builds, so pros save max for key days or cycle off instead of daily full blasts. Store sealed, cool, dry, and keep scoop dry to avoid clumps.
What to Expect
Minutes 0-10: not much yet, just starting to absorb, especially on empty with water. Minutes 10-20: caffeine hits, and yohimbine-style edges show as more alert, warm, and urgent. Minutes 20-40: peak time—energy's full blast, focus tightens, and the high-stim vibe shines. Minutes 40-90: stays strong without quick drop, thanks to naringin slowing the fade. Days 1-7: focus on tolerance over buildup; you'll figure quick if 1 scoop works or you can handle more. Weeks 2-4: get used to it and manage tolerance—cycle smart to keep it punching.
Key Ingredients
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Caffeine Anhydrous — 250mg per scoop; 500mg per 2 scoops — High-output energy with immediate performance-focused stimulation
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2-Aminoisoheptane — 75mg per scoop; 150mg per 2 scoops — Hard-hitting drive and urgency beyond caffeine alone
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Eria Jarensis extract — 100mg per scoop; 200mg per 2 scoops — Mood-elevated focus with sharper stimulant quality
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Yohimbine HCl — 3mg per scoop; 6mg per 2 scoops — Adrenergic fat-loss support with a sharper edge
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Alpha Yohimbine — 1.2mg per scoop; 2.4mg per 2 scoops — Amplified intensity layered onto the yohimbine profile
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Naringin — Dose disclosed on label; specific amount not provided in supplied verified formula block — Extends formula life through bioavailability support
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Huperzine A — Dose disclosed on label; specific amount not provided in supplied verified formula block — Sharper mental lock through acetylcholine preservation
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L-DOPA — Dose disclosed on label; specific amount not provided in supplied verified formula block — Dopamine precursor support for training motivation
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Higenamine — Dose disclosed on label; specific amount not provided in supplied verified formula block — Beta-2 adrenergic activity for a hotter feel
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Hordenine — Dose disclosed on label; specific amount not provided in supplied verified formula block — Norepinephrine support for sustained stimulant pressure
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Bitter Orange extract — Dose disclosed on label; specific amount not provided in supplied verified formula block — Citrus-derived adrenergic support for cutting phases
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Grains of Paradise — Dose disclosed on label; specific amount not provided in supplied verified formula block — Thermogenic support aimed at increased body heat
Frequently Asked Questions
How much caffeine is in Metabolic Nutrition Synedrex Powder?
Synedrex Powder provides 250mg caffeine anhydrous per 1 scoop and 500mg at the full 2-scoop maximum. That is a very high stimulant load even before accounting for DMHA, Eria Jarensis, yohimbine HCl, alpha yohimbine, and the other adrenergic ingredients in the formula.
Is Synedrex Powder a pre-workout or a fat burner?
It is best understood as a high-stim thermogenic/pre-contest prep powder that can also function as a pre-workout for advanced users. The formula prioritizes energy, thermogenesis, appetite control, and focus—not pumps, hydration, or endurance support.
Should I start with 1 scoop or 2 scoops?
Most users should absolutely start with 1 scoop. At that dose you already get 250mg caffeine, 100mg Eria Jarensis, 3mg yohimbine HCl, 1.2mg alpha yohimbine, and 75mg DMHA, which is strong enough to assess tolerance safely.
What does DMHA do in this formula?
DMHA, or 2-aminoisoheptane, is used for stronger CNS stimulation through dopamine and norepinephrine-related activity. At the full 150mg serving, it sits within the commonly targeted industry range and contributes to the hard-hitting, urgent, high-drive feel that sets this apart from simpler caffeine-only thermogenics.
Why is naringin included in Synedrex Powder?
Naringin is a bio-enhancer that can inhibit CYP3A4 and P-glycoprotein, slowing the metabolism or clearance of certain compounds. In practical terms, it's included to help extend the life of the stimulant experience rather than letting it fade too quickly.
Can I use Synedrex Powder for fasted cardio?
That is one of the most logical use cases for this formula, especially for advanced users who specifically seek yohimbine-based thermogenic support. Yohimbine HCl, alpha yohimbine, caffeine, and bitter orange compounds are often used in fasted settings, but the intensity can be high, so tolerance matters.
Will Synedrex Powder suppress appetite?
Many users choose formulas like this specifically for that reason. The high stimulant load, yohimbine-class ingredients, and broader adrenergic matrix are all consistent with the appetite-blunting effect commonly sought during a cut.
Is Synedrex Powder fully disclosed or proprietary?
It is fully disclosed, which is a major advantage in the high-stim category. You can see the exact amounts of the primary ingredients instead of guessing what's hidden inside a proprietary blend.
Can I stack Synedrex Powder with coffee or another pre-workout?
That is generally not a good idea unless you are extremely deliberate with your stimulant totals. Because Synedrex already contains up to 500mg caffeine plus DMHA, yohimbine HCl, alpha yohimbine, and other stimulants, stacking can push the experience into an unnecessarily risky range.
Is this a good product for beginners?
No. Even the starting scoop is too aggressive for most new users, and the presence of multiple stimulant classes makes it better suited to advanced users with known tolerance.
