BOOST ENERGY
Hit every training session with 350mg of caffeine from natural coffee bean extract, layered with Theobromine and Dynamine™ for fast-acting, sustained energy that keeps you locked in from the first set to the last rep.










The DOPAPHEN™ Xtreme Dopamine Synergy Blend of L-Tyrosine and DL-Phenylalanine keeps mental drive, motivation, and focus elevated when training intensity is at its highest.
Hit every training session with 350mg of caffeine from natural coffee bean extract, layered with Theobromine and Dynamine™ for fast-acting, sustained energy that keeps you locked in from the first set to the last rep.
InnoSlim® and PureGBB™ work together in the Thermogenic Matrix to help support fat metabolism and heat production, making every workout a meaningful step forward for both performance and physique.
Four grams of L-Citrulline drive nitric oxide production and blood flow, delivering the muscle fullness and vascular performance that makes every set feel completely dialed in.
You do not just want to train harder. You want to train harder and look the part. Our enhanced Nitraflex® Burn formula is GAT Sport's thermogenic pre-workout powder, engineered for athletes who refuse to choose between elite performance and serious physique results. Powered by 4g of L-Citrulline for maximum muscle pumps, 350mg of caffeine from natural coffee bean extract for explosive energy, and a cutting-edge Thermogenic Matrix anchored by InnoSlim® and PureGBB™ to help support fat metabolism and heat production, every scoop is a full-spectrum assault on mediocre workouts. Stamina. Thermogenesis. Energy. All three, every session. No excuses.
Pair this product with complementary GAT Sport products to cover energy, strength, and recovery.



See how these options differ on intended use, timing, and key specs.

Best for
High-stim thermogenic performance, energy, focus and pumps
When to use
Morning on an empty stomach, 20–30 minutes before your first meal or protein shake
Key specs
350mg caffeine; 4g L-Citrulline; 3.2g Beta-Alanine; 2.5g Betaine
Flavors available
Best for
Thermogenic pre-workout energy, focus and pumps
When to use
20–30 minutes before training; do not take within 6 hours of bedtime
Key specs
325mg caffeine; Nitrosigine® + CaloriBURN® thermogenic blend
Flavors available
Best for
Thermogenic energy, appetite control and weight-management support
When to use
Morning and afternoon; avoid before bedtime
Key specs
Approx. 286mg caffeine per 3 capsules; Advantra Z® + BioPerine® + Guarana
Flavors available
Select size or flavor

As a dietary supplement, begin by taking ½ a serving mixed with 10-12 fluid oz. of cold water in the morning on an empty stomach 20-30 minutes prior to your first meal or protein shake. From there, find your own personal tolerance. For best results, use with a combined diet and training program. DO NOT EXCEED 1 SCOOP IN ANY 24-HOUR PERIOD. Store in a cool, dry place. CONTAINS 350mg OF CAFFEINE PER SERVING.
This product is strictly intended for use by healthy persons 18 years of age or older. Each serving (1 scoop) contains 350mg of caffeine. Do not combine with other caffeine or stimulant-containing products. Do not use if you are pregnant, nursing or trying to become pregnant. Do not use if you are currently unaware of your health status or if you have a medical condition including but not limited to heart, liver, kidney, or thyroid disease, psychiatric or epileptic disorders, high or low blood pressure, cardiac arrhythmia, recurrent headaches, enlarged prostate or glaucoma. Do not use if you are taking prescription or non-prescription medication of any kind including but not limited to MAO inhibitors, anti-depressants, aspirin or non-steroidal anti-inflammatory drugs. Do not use if you are prone to over-heating or dehydration. Discontinue at least 2 weeks prior to surgery or if you experience rapid heartbeat, dizziness, severe headache or shortness of breath. KEEP OUT OF REACH OF CHILDREN.
WARNING: This product may contain a chemical known to the State of California to cause birth defects or other reproductive harm. For more information go to p65warnings.ca.gov.
We know that choosing the right supplements and vitamins is an essential part of your health and fitness journey. That’s why we’ve put together answers to the most common questions our customers ask, covering everything from ingredient transparency to usage.
Key actives and what they do — open a row for the full dose detail.
L-Citrulline is a non-essential amino acid that plays a central role in the nitric oxide pathway. After consumption, it converts to L-arginine in the kidneys, which helps support increased nitric oxide production, improved blood flow, and greater oxygen and nutrient delivery to working muscles. The result is bigger, more consistent pumps, greater training volume capacity, and the ability to sustain higher performance across more sets before fatigue catches up.
Beta-Alanine raises muscle carnosine levels, which helps buffer the lactic acid buildup that causes that burning sensation during high-intensity work. By slowing that process, it delays the point at which your muscles force you to stop, allowing you to extend sets and sustain intensity from warm-up to final rep. The tingling sensation known as paresthesia that you may feel after taking it is normal, harmless, and a familiar signal to anyone who trains seriously.
Betaine Anhydrous is a well-researched performance ingredient derived from beets. It functions as an osmolyte, helping muscle cells maintain hydration and cellular integrity under heavy training stress, which supports increased power output, strength, and muscular endurance over the course of a demanding session.
At 350mg per serving sourced from natural coffee bean extract, this is a high-output caffeine dose built for experienced, caffeine-tolerant athletes. Caffeine is one of the most extensively studied ergogenic aids in sports nutrition, and at this level it delivers a significant boost in energy, alertness, focus, and training endurance. This dose is intentionally powerful. Start with half a scoop to assess your personal tolerance before progressing to a full serving.
VitaCholine® is a premium choline source that supports production of acetylcholine, the neurotransmitter driving both muscle contraction and cognitive function. It helps reinforce the mind-muscle connection and contributes to the clean, focused training state the XPLOSIVE ENERGY and FOCUS BLEND is designed to create.
Theobromine is a naturally occurring compound found in cacao that works alongside caffeine to deliver a smoother, more sustained energy experience. Its slower-acting profile helps extend the overall energy window and contributes to a more controlled performance state throughout the entire training session.
Dynamine™ is a fast-acting neuro-activating compound that supports energy, focus, and mood by influencing dopamine and adenosine receptor activity. It tends to kick in quickly after consumption, making it a key contributor to the sharp mental focus and motivation you feel shortly after taking Nitraflex® Burn.
L-Tyrosine is an amino acid and direct precursor to dopamine, norepinephrine, and adrenaline: the three neurotransmitters at the center of motivation, drive, and mental performance under stress. DL-Phenylalanine adds complementary dopamine and enkephalin support. Together in the DOPAPHEN matrix, these two ingredients keep your head in the game and your drive locked in from set one to the final finisher.
InnoSlim® is a patented metabolic ingredient made from Panax notoginseng and Astragalus root. It has been studied for its ability to support fat metabolism by modulating AMPK and insulin signaling pathways in fat and muscle tissue. In Nitraflex® Burn, InnoSlim® is the cornerstone of the Thermogenic Matrix, contributing real metabolic support beyond what stimulants alone can deliver. It is what separates this formula from a standard pre-workout.
PureGBB™ is a patented precursor to L-Carnitine. After consumption, the body can convert it into L-Carnitine, a compound that plays a key role in transporting fatty acids into the mitochondria to be used as fuel. PureGBB™ may help amplify the body's natural carnitine production and thermogenic output, and is associated with increased perspiration during training, reflecting the thermogenic process working.
BioPerine® is a standardized black pepper extract that has been studied for its ability to enhance the absorption of other compounds. Its inclusion in the formula helps support the bioavailability of the other key ingredients so what is on the label is working as efficiently as possible.
Boron is a trace mineral with a growing body of research supporting its role in hormone metabolism, including testosterone and estrogen regulation, as well as cognitive function. Its inclusion adds a foundational micronutrient dimension to the overall performance and physique-support formula.