Nutrastop | Hi-Tech Plasmagen | 80 CapsulesNutrastop
- SuppVault Score
- 62/100

Nutrastop
Arginase inhibition, HydroMax® hydration, and hard-edged capsule energy
$34.95 $54.95$1.74/servingScore reflects incomplete data — label not yet scanned. Not a quality judgment.
The label is the formula. We score it either way.
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High-stim capsule pre-workout with HydroMax® glycerol, Nitro-Rx®, and a multi-pathway pump design. Built for experienced users who want portable energy, vascularity, and harder training intensity.
| Ingredient | Amount Per Serving | % Daily Value |
|---|---|---|
| Adenosine 5 Triphosphate Disodium | — | † |
| Caffeine Anhydrous | — | † |
| Choline Bitartrate | — | † |
| Cnidium Monnieri Extract | — | † |
| Glycerol | — | † |
| Inosine | — | † |
| Inositol Citrulline Silicate | — | † |
| N Omega Hydroxy Nor L Arginine | — | † |
| Phosphatidylcholine | — | † |
| Phosphatidylcholine Mct | — | † |
| Phosphatidylserine (20%) | — | † |
| Potassium Glycinate | 99mg | † |
| Alpha Yohimbine (90% Rauwolscine) | — | † |
| S 2 Boronoethyl L Cysteine Hcl | — | † |
| Tri Xanthine Blend | — | † |
† Daily Value (DV) not established for this ingredient.
Nutrastop publishes test results from independent third-party labs. Svpplements links to the manufacturer’s data — we don’t test products ourselves.
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Plasmagen is acute-performance focused and does not provide a disclosed full creatine dose. Adding daily creatine fills the long-term strength, power, and phosphocreatine-repletion gap that this capsule formula does not fully cover.
Take creatine daily, any time; use Plasmagen 20-30 minutes pre-workout
HydroMax® glycerol performs best when fluid and electrolytes are adequate. A dedicated hydration product makes the volumization and pump side of Plasmagen more reliable, especially during long sessions or hot-weather training.
Use hydration pre-, intra-, or post-workout around Plasmagen
Advanced users who want to push the pump side harder can pair Plasmagen with a dedicated stim-free pump formula. This is best reserved for experienced users because Plasmagen already brings both energy and vascular support.
Take both 20-30 minutes pre-workout; assess tolerance first
RAW Pump likely wins on transparency and dedicated pump dosing, while Plasmagen wins on stimulant inclusion and portability.
Plasmagen offers a more complete pre-workout experience with energy and focus built in.
Hemavol is cleaner and more pump-specific, while Plasmagen is more aggressive and all-in-one.
RAW Pre likely offers better dose transparency and more comprehensive disclosed performance support, but Plasmagen is more convenient in capsule form.
Side-by-side against the closest competitors. Score reflects clinical dosing, transparency, and testing.
Nutrastop | Hi-Tech Plasmagen | 80 CapsulesNutrastop
Raw Nutrition | Pump | 40 ServingsRaw Nutrition
RAW Pump likely wins on transparency and dedicated pump dosing, while Plasmagen wins on stimulant inclusion and portability.
Compare side-by-side →
PerformaX | 3DPump | 40 CapsulesPerformaX
Plasmagen offers a more complete pre-workout experience with energy and focus built in.
Compare side-by-side →
iForce Nutrition | HemavolIForce Nutrition
Hemavol is cleaner and more pump-specific, while Plasmagen is more aggressive and all-in-one.
Compare side-by-side →Comparison data combines live storefront pricing with our SuppVault analysis. Competitor scores reflect public-label data; manufacturer-side changes may not be reflected in real time.
Nutrastop Hi-Tech Plasmagen is a capsule-based high-stim pump and performance hybrid built around a more advanced concept than the average nitric oxide product. Instead of relying on a standard citrulline-heavy powder formula, it uses a multi-pathway approach: upstream nitric oxide support through arginase inhibition, downstream vascular support, plasma-expanding hydration support, stimulant-driven training intensity, and membrane-based cognitive ingredients for focus. In plain terms, this is designed to make training feel tighter, more vascular, more energized, and more mentally aggressive.
The most interesting part of the formula is the 250 mg arginase inhibitor concept verified in retailer research around N(omega)-hydroxy-nor-L-arginine and S-(2 Boronoethyl)-L-Cysteine HCl. Arginase competes with nitric oxide synthase for arginine; inhibit arginase, and more arginine can stay available for NO production. That is a smart mechanistic strategy because it tries to improve pump biochemistry upstream rather than only dumping in more substrate. The issue is transparency: the individual amounts are not disclosed, so while the concept is strong, exact dose validation is impossible.
HydroMax® glycerol is another major pillar. Glycerol works osmotically, pulling and retaining water in intracellular and extracellular compartments to expand plasma volume and drive that dense, swollen “water pump.” Research-supported glycerol ranges commonly land around 2,000-5,000 mg, but the Plasmagen label does not disclose the exact HydroMax® amount. That means the ingredient choice is excellent, but the dose cannot be verified against the literature. The same applies to Nitro-Rx® inositol citrulline silicate: it is included for pump support and likely contributes to blood flow and vasodilation, but the lack of disclosed milligrams keeps it from earning a full clinical endorsement.
The stimulant backbone is clearly assertive. Caffeine anhydrous is present alongside the proprietary Tri-Xanthine™ blend of green coffee, green tea, and cocoa extract, plus Rauwolfia serpentina extract. That tells you this is not a soft-focus capsule product. Expect fast onset energy from the anhydrous caffeine, a broader methylxanthine feel from the blend, and a sharper, harder edge from the advanced stimulant matrix. Because total caffeine is undisclosed, stimulant tolerance matters here.
On the focus side, choline bitartrate, phosphatidylserine, phosphatidylcholine, and purified phosphatidylcholine in MCTs create a membrane-and-neurotransmitter support angle. Choline is the precursor to acetylcholine, the neurotransmitter involved in muscle contraction and attention. Phosphatidylserine has moderate evidence around cognitive support and stress modulation at around 300 mg in studies, while phosphatidylcholine supports cell membranes and acts as a choline donor. Again, the formula idea is smart, but the hidden doses mean these likely function as supportive nootropic layers rather than fully clinically validated standalone doses.
Potassium is one of the few fully disclosed actives at 99 mg as potassium glycinate complex. Potassium is essential for nerve transmission, membrane potential, and muscle contraction, and the glycinate form is gentler and better tolerated than harsher potassium salts. This is not a high-performance electrolyte dose in itself, but it is a sensible inclusion to support neuromuscular function in a pump-oriented formula.
Synergy is where Plasmagen makes the most sense. Arginase inhibitors aim to keep NO production favorable, Nitro-Rx® adds an additional pump pathway, HydroMax® increases plasma volume and cell swelling, stimulants raise training output, and choline/phospholipids sharpen the brain-muscle link. That gives the formula a coherent identity: not just energy, not just pump, but vascular aggression plus heightened training intensity.
The limitation is transparency. This is a proprietary-blend formula, and that matters. Compared with full-disclosure leaders in the category, Plasmagen asks you to trust the formulator on several important actives. Day 1, expect energy, drive, appetite suppression in some users, and a fuller pump if hydration is on point. Over 2-4 weeks, the experience is less about ingredient loading and more about repeatedly leveraging the same acute training effect: better session intensity, stronger perceived vascularity, and a more “locked in” feel when used before hard training.
Arginase and nitric oxide synthase compete for arginine. By inhibiting arginase, compounds like nor-NOHA and BEC aim to preserve arginine availability for endothelial nitric oxide production, which can improve vasodilation dynamics during exercise. This is mechanistically distinct from simply adding more oral arginine, which often underperforms because of first-pass metabolism and limited bioavailability. In a sports nutrition context, this makes arginase inhibition an upstream strategy for supporting pumps and vascularity.
Glycerol increases total body water by osmotically retaining fluid across intracellular and extracellular spaces. That expansion in plasma volume can improve heat tolerance, delay dehydration, and create a visibly fuller muscular appearance during training. In resistance exercise, users typically value glycerol less for raw strength and more for the rounder, denser pump it helps create. Its effectiveness depends heavily on concurrent fluid intake, making hydration behavior critical.
Choline serves as a precursor to acetylcholine, a neurotransmitter central to attention, motor control, and neuromuscular signaling. Phosphatidylcholine and phosphatidylserine contribute membrane phospholipids that support neuronal structure and signaling integrity. Although these ingredients are not as acutely stimulating as caffeine, they can make a formula feel more controlled and purpose-driven rather than merely excitatory. Their utility is often greatest when layered underneath stimulants rather than used alone.
Caffeine is the dominant acute ergogenic stimulant in most pre-workouts, but formulas that combine multiple xanthine sources can alter the character of the effect. Cocoa-derived theobromine and tea/coffee alkaloid profiles can broaden stimulation and change how energy feels subjectively. Rather than only increasing alertness, these combinations often aim for a longer, more textured performance state. The exact experience depends on total dose and ratio, which is why disclosed milligrams matter so much in final evaluation.
Verified athletes can view NCAA, WADA, and high-school compliance status for this product.
* 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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