Alchemy Labs | Stim & Slim | 60 CapsulesAlchemy Labs
- SuppVault Score
- 93/100
- Per serving
- $1.5

Alchemy Labs
Layered caffeine, rauwolscine, and real thermogenic trademarks
$44.95 $48.99$1.49/servingStim & Slim is a high-stim thermogenic capsule built for energy, focus, and harder-cutting phases. It uses a layered stimulant and heat-support design rather than caffeine alone. Full serving delivers 263mg total caffeine.
Alchemy Labs 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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Stim & Slim handles the energy, appetite, and thermogenic side of a cut, but it does not include creatine. Adding 3-5g daily creatine supports phosphocreatine replenishment and helps preserve power output and training quality while calories are reduced.
Take daily at any time; can be taken alongside Stim & Slim pre-workout or separately with a meal.
Thermogenics help adherence, but body-composition progress still depends heavily on protein intake. A fast-digesting protein supports satiety, recovery, and lean mass retention while Stim & Slim helps control appetite and maintain training intensity.
Use post-workout or between meals to help hit daily protein targets.
Stim & Slim is not a nitric oxide formula, so pairing it with a stimulant-free pump product can improve blood flow, muscle fullness, and workout feel without adding more caffeine. This is a smart stack for users who want cutting support and gym performance in the same session.
Take together 20-30 minutes before training, provided the pump formula is stimulant-free.
High-stim thermogenics often increase sweating, body warmth, and fluid needs, especially during cardio or training in a deficit. Adding sodium, potassium, and magnesium support can improve training quality and reduce the washed-out feeling that sometimes gets mistaken for poor stimulant response.
Use before, during, or after training; especially useful when taking Stim & Slim pre-cardio.
Aggressive stimulant use during cutting phases can strain recovery if timing is poor or sleep quality slips. A nighttime recovery supplement helps offset one of the most common weak points in any stimulant-driven fat-loss phase: inadequate sleep undermining appetite control, training quality, and body composition.
Use in the evening only, well separated from Stim & Slim.
Stim & Slim has a more aggressive stimulant profile and stronger immediate energy feel.
Oxystim Pro is likely the stronger pick for users specifically chasing top-end stimulant intensity.
Apex Burn offers polished mainstream fat-loss support, while Stim & Slim leans harder into aggressive energy.
Stim & Slim is better for users wanting appetite control, focus, and workout-driven stimulation.
Side-by-side against the closest competitors. Score reflects clinical dosing, transparency, and testing.
Alchemy Labs | Stim & Slim | 60 CapsulesAlchemy Labs
Alchemy Labs | Inhibit | 120 CapsulesAlchemy Labs
Stim & Slim has a more aggressive stimulant profile and stronger immediate energy feel.
Compare side-by-side →
Alchemy Labs | Oxystim Pro | 60 CapsulesAlchemy Labs
Oxystim Pro is likely the stronger pick for users specifically chasing top-end stimulant intensity.
Compare side-by-side →
Alpha Lion | Apex Burn | 21 ServingsAlpha Lion
Apex Burn offers polished mainstream fat-loss support, while Stim & Slim leans harder into aggressive energy.
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.
Alchemy Labs Stim & Slim is a high-stim thermogenic capsule designed around one clear objective: increase output, sharpen focus, and push calorie-burning pathways with a layered stimulant-thermogenic architecture instead of relying on caffeine alone. This is not a “fat burner” in the lazy sense of underdosed botanicals and vague marketing. The formula uses multiple pathways: central nervous system stimulation, catecholamine support, alpha-2 receptor antagonism, TRPV1 thermogenesis, and brown adipose tissue activation. That gives it a more sophisticated profile than capsule formulas that simply spike heart rate and call it metabolism.
The energy backbone starts with 200mg caffeine anhydrous for fast onset, then adds two buffered caffeine forms: 50mg Infinergy™ caffeine citrate and 50mg Infinergy™ di-caffeine malate yielding 38mg caffeine. That brings total caffeine to 263mg, with a quicker front-end rise from anhydrous and citrate, then a smoother tail from malate. In practice, that means a stronger launch and less of the abrupt drop common with single-source stimulant products. Theobromine at 75mg extends the methylxanthine profile further. While below the 250-500mg range often used in blood pressure or alertness research, it is still a useful support dose here for mild stimulation, smoother mood, and bronchodilatory/vasodilatory support alongside caffeine.
L-Tyrosine at 500mg is included to support catecholamine synthesis. It is below the high acute stress-research range of roughly 100-150mg/kg bodyweight, so this is not a fully clinical standalone tyrosine dose. But in a thermogenic formula, it still makes formulation sense: caffeine and rauwolscine accelerate sympathetic output, and tyrosine provides substrate support for dopamine and norepinephrine production when training stress, dieting, and sleep debt start draining mental sharpness.
The thermogenic side is where this formula separates itself. Advantra Z® at 150mg is a strong dose of standardized Citrus aurantium extract, supplying synephrine activity that complements caffeine through adrenergic stimulation. CaloriBurn GP® at 30mg is right in the human research sweet spot for grains of paradise, a dose associated with increased brown adipose tissue activation and higher energy expenditure. Evothin™ at 30mg matches the emerging-use target dose for evodiamine, a non-pungent TRPV1 agonist designed to mimic heat-producing pathways similar to capsaicin without relying entirely on sensory burn. Capsaicin is listed at 100mg from a 1% capsaicinoid extract, which yields about 100mg capsaicinoids. That places it just under the commonly studied 1.2-12mg range, so this is best viewed as a supportive thermogenic layer rather than a clinically dosed capsaicin centerpiece.
Rauwolscine at 1.5mg is fully in the effective range and one of the formula’s most powerful levers. As an alpha-2 adrenergic antagonist, it increases noradrenergic signaling and is especially relevant for appetite suppression and mobilization of stubborn fat. This is also the ingredient that makes Stim & Slim clearly high-stim rather than moderate. Sensitive users often feel rauwolscine as heightened urgency, stronger thermogenesis, and more pronounced appetite blunting.
Niacin at 15mg is not here as a pharmacological lipid dose; it is simply a basic vitamin-level inclusion supporting NAD/NADP-dependent energy metabolism. Transparency is a major positive here: no proprietary blend, every active disclosed, and trademarked ingredients identified. In a category full of hidden stimulant matrices, that matters.
What to expect: day one is about noticeable energy, warmer body temperature, stronger drive, and reduced appetite. Over 2-4 weeks, the biggest practical benefit is not “fat melting,” but more consistent training output and dietary adherence while cutting. That is where this formula earns its place.
Stim & Slim uses multiple caffeine forms to shape onset and persistence rather than relying on a single anhydrous bolus. Caffeine anhydrous generally drives the sharper front-end rise in plasma caffeine, while citrate and malate forms can influence perceived smoothness and duration through staggered delivery characteristics. Mechanistically, caffeine antagonizes adenosine receptors, reducing perceived fatigue and increasing alertness, training readiness, and sympathetic drive. In practice, this supports both mental intensity and sustained output during calorie restriction.
L-tyrosine serves as a precursor for catecholamine neurotransmitters including dopamine and norepinephrine. Under stressful conditions such as dieting, sleep restriction, or hard training, precursor availability may help preserve aspects of cognitive performance and task engagement. Its value is usually most noticeable as a support ingredient that makes a stimulant formula feel more focused and less mentally scattered. This is especially relevant in cutting phases where motivation and concentration often decline.
Capsaicin activates TRPV1 receptors, which can increase thermogenic signaling and the subjective sensation of warmth. That receptor activity is linked to transient increases in energy expenditure and may also modestly affect appetite and food intake in some users. The effect is not magic fat loss by itself, but it meaningfully complements a stimulant-based thermogenic framework. Its inclusion helps distinguish true heat-support formulas from products that are simply high in caffeine.
Grains of paradise extracts standardized for 6-paradol have attracted interest for their ability to increase thermogenic activity partly through brown adipose tissue-related pathways. Brown adipose tissue is metabolically active and dissipates energy as heat, making it a relevant target in modern thermogenic design. While outcome data are still developing, the ingredient fits well mechanistically in formulas aimed at increasing calorie expenditure. It is best viewed as a supportive amplifier rather than a standalone fat-loss driver.
Piperine from black pepper extract is often used to enhance absorption kinetics of certain nutrients and phytochemicals. Proposed mechanisms include effects on intestinal transport, membrane dynamics, and enzyme activity involved in metabolism. In a complex thermogenic formula, this may help improve overall ingredient exposure, particularly for botanical actives. Its role is supportive, but at evidence-based doses it can improve formulation efficiency.
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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