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A demanding workout takes more than energy.
It takes focus. Blood flow. Fluid balance. Muscles ready to work—and the ability to keep putting in effort as the session gets harder.
Krayon Fuel™ brings those priorities together through five integrated systems.
Every ingredient has a purpose. Every dose reflects a decision. Some ingredients contribute to more than one system because their roles in the body naturally overlap.
Here’s what each ingredient brings to your training.
Before you mix
Check the serving size and directions printed on your sample packet. The systems below show full-serving amounts. Open the Supplement Facts panel for both one-scoop and two-scoop amounts. Do not assume one packet equals two scoops.
Tub label directions: As a dietary supplement, take two (2) scoops with 12–16 fl oz of water. Do not exceed recommended dose.
Contains a milk-derived ingredient: VasoDrive-AP® is made from hydrolyzed milk casein.
Support blood flow. Stay hydrated. Bring the pump.*
The training pump involves both circulation and the fluid environment surrounding working muscles.
Krayon Fuel approaches those demands through five complementary mechanisms: nitric-oxide precursor support, vascular-tone support, endothelial signaling, organic-osmolyte water handling, and electrolyte-driven fluid balance.*
Glycerol adds a distinct fluid-retention role within that hydration strategy.
Provides the building material for nitric oxide.*
Your body converts citrulline into arginine, which it uses to produce nitric oxide. Nitric oxide signals blood vessels to relax, supporting blood flow.*
Citrulline’s job is to increase the availability of that starting material.
What that means for you:Support for the blood-flow side of your training pump.*
Supports how blood vessels regulate tension.*
Blood vessels continually adjust how tightly they constrict and how much they relax.
VasoDrive-AP provides specialized milk-derived peptides studied for their interaction with ACE, an enzyme involved in signals that tighten blood vessels.*
Its role centers on vascular tone—the degree of tension in the vessel wall.
What that means for you:Complementary vascular support alongside citrulline’s nitric-oxide precursor role.*
Vascular support, down to the small vessels.*
Citriva supplies citrus flavanones, including hesperidin, studied for their effects on the inner lining of blood vessels. That lining helps regulate how vessels relax and respond to the body’s needs—including within the smaller vessels involved in microcirculation.*
Its role in your pump:Endothelial and microvascular support that complements citrulline’s role in providing the building material for nitric oxide.*
Its secondary role in performance:Circulatory support that complements the demands placed on working muscles.*
One ingredient with a primary purpose in the pump system—and a supporting role in performance.
The hydration portion brings together ingredients with different responsibilities: glycerol for fluid retention, betaine for the cell’s internal environment, and taurine for cellular regulation and muscular function.
Selected for the fluid side of muscle fullness.
HydroPrime supplies glycerol, a water-attracting compound included to support fluid retention when consumed with water.*
What that means for you:Hydration support selected with a fuller training pump in mind.*
Helps cells maintain their internal balance.*
Betaine is an organic osmolyte—a compound cells use to help regulate water balance when conditions around them change. It also helps protect normal protein function within that environment.*
Its emphasis is maintaining suitable conditions inside the cell.
What that means for you:Support for cellular water balance and normal cell function.*
Connects cellular fluid regulation with muscular function.*
Taurine participates in regulating cell volume. It also contributes to calcium handling inside muscle cells, where calcium helps control contraction.*
That gives taurine a role connecting hydration with the way muscles function.
What that means for you:Cellular fluid-regulation support with an additional contribution to normal muscular function.*
Supports the fluid surrounding your cells.*
Sodium is the body’s main extracellular electrolyte, meaning it works primarily in the fluid outside your cells.
It helps maintain fluid balance and supports the electrical signals nerves and muscles need to function.*
What that means for you:Support for fluid balance and normal muscle activation during training.*
Bring together vascular support and distinct approaches to water handling for the training-pump environment.*
Built to help you lock in.*
A productive workout takes attention: following your plan, concentrating on the next set, and staying mentally engaged as the demands increase.
Five core ingredients contribute different approaches to that goal, with vitamin B6 providing supporting nutritional function.
Provides precursor material for attention-related chemical messengers.*
Your body uses tyrosine to make dopamine and norepinephrine, messengers involved in attention and responses to demanding conditions.
The body regulates their production. Tyrosine supplies material used in that process.*
Why it belongs:To provide additional tyrosine availability under demand, drawing on research involving cognitive performance in stressful conditions.
Supplies choline for communication between cells.*
Alpha-GPC provides choline, which the body can use to make acetylcholine.
Acetylcholine is a chemical messenger involved in attention and communication between nerves and muscles.*
What that means for you:Choline support for signaling processes involved in mental and muscular function.*
Helps you feel alert and ready to engage.*
Adenosine is involved in the buildup of sleepiness. Caffeine blocks its receptors, helping increase alertness and attention.*
What that means for you:Greater wakefulness and support for paying attention to the workout in front of you.*
Complements caffeine’s effects on attention.*
L-Theanine is an amino acid found in tea. Research pairing it with caffeine has examined benefits for aspects of attention and performance on mental tasks.
Its purpose here is to complement the focus experience without adding another stimulant.*
What that means for you:An additional approach to attention support alongside caffeine.*
Selected for the demands that come with fatigue.
Rhodiola is a botanical studied in settings involving physical and mental fatigue.
Its research explores performance under demanding conditions, although findings vary and its mechanisms remain under investigation.
Why it belongs:To complement the system’s emphasis on mental engagement as demands increase.
Supports the chemistry behind normal neurotransmitter function.*
Vitamin B6 helps enzymes carry out reactions involved in making neurotransmitters.*
Its distinct role:Nutritional cofactor support for normal nervous-system function.*
Support alertness, attention, concentration, and mental engagement through ingredients with different roles.*
Hydrate with purpose. Support your performance.*
Hydration depends on how fluid is distributed throughout the body. Electrolytes also help create the electrical conditions that allow nerves to communicate and muscles to contract.*
Krayon Fuel provides deliberate sodium and potassium amounts, complemented by ingredients addressing other aspects of water handling.
The main electrolyte outside your cells.*
Sodium helps maintain extracellular fluid balance. Movement of sodium across cell membranes also helps carry the electrical signals that activate muscles.*
What that means for you:Support for fluid balance, nerve transmission, and normal muscle contraction.*
The main electrolyte inside your cells.*
Potassium helps maintain the electrical conditions within cells. Working alongside sodium, it supports normal nerve transmission and muscular function.*
What that means for you:Support for the cellular electrical activity that makes movement possible.*
Supplies glycerol for fluid-retention support when consumed with water.*
Helps cells regulate their internal water balance and maintain normal protein function.*
Participates in cell-volume regulation while contributing to normal muscular function.*
Support fluid balance, cellular function, and the nerve signals that keep muscles working.*
Hydration is built into the formula because it matters throughout the session.
Bring the energy. Stay in control.*
Krayon Fuel is built around one primary stimulant:
250 mg of caffeine per full serving.
Supporting ingredients contribute their own roles in attention, fatigue research, and normal energy metabolism.
The primary source of stimulation.*
Caffeine’s effects on adenosine receptors help increase alertness. During exercise, it can also reduce perceived effort—how hard the work feels.*
What that means for you:Support for feeling alert and taking on demanding exercise.*
Attention support alongside caffeine.*
Theanine complements the focus component of the experience without increasing the stimulant dose.*
A botanical selected for research involving fatigue.
Rhodiola’s inclusion reflects research on physical and mental demands. Its intended role is separate from caffeine’s direct stimulation.
Supports normal energy and neurotransmitter metabolism.*
B6 helps enzymes perform reactions involved in using nutrients and producing chemical messengers.*
Deliver training energy and alertness with one clearly dosed primary stimulant.*
“Controlled” describes the formula’s design. Individual responses to caffeine vary.
Built as a complete system—not a list of ingredients. Every ingredient chosen for a reason.
Performance depends on more than what you feel in the first few minutes.
Some ingredients act during the session. Others build their contribution through consistent use. Their selected roles address buffering, muscular function, fluid balance, circulation, and exercise effort.*
Builds muscle buffering capacity over time.*
With consistent daily intake, beta-alanine helps increase muscle carnosine. Carnosine helps buffer the rise in acidity that occurs during intense muscular work.*
What that means for you:Support for high-intensity exercise capacity as muscle carnosine levels build.*
This benefit develops through repeated daily intake over weeks. The tingling some people experience is separate from carnosine loading.
Cellular support with a resistance-training research rationale.
Betaine’s osmolyte role helps maintain conditions inside cells. It also participates in normal metabolic reactions through a process called methyl donation.*
Researchers have studied 2.5 grams daily in resistance-training settings, with mixed findings for strength and power.
Why it belongs:Its established cellular function, alongside research exploring training outcomes.
Supports processes involved in muscle contraction.*
Muscle cells rely on calcium signals to contract. Taurine contributes to calcium handling, giving it a performance-system role beyond cellular fluid regulation.*
What that means for you:Support for normal muscular function.*
Primary pump support. Secondary performance support.*
Citriva’s citrus flavanones place it primarily within the vascular portion of the pump system.
Its supporting performance role centers on circulation—the vascular environment in which working muscles operate.*
What that means for you:Endothelial and microvascular support that complements the broader performance system.*
Helps carry the signal that activates muscle.*
Sodium movement across cell membranes is part of the electrical signaling required for normal muscle contraction.*
What that means for you:Neuromuscular support alongside its fluid-balance role.*
Supports exercise effort as well as alertness.*
Caffeine acts on the central nervous system and can reduce how demanding exercise feels.*
What that means for you:Support for exercise performance when the work becomes challenging.*
Selected for targeted nutrient-absorption support.*
AstraGin is a botanical blend studied for effects on intestinal processes involved in absorbing certain nutrients and amino acids.
Its role concerns nutrient uptake. Research on individual nutrients does not establish increased absorption of every ingredient in the formula.
Why it belongs:To provide a distinct supporting role focused on absorption.*
Bring together daily buffering support, normal muscular function, fluid balance, vascular support, and exercise performance.*
Amounts shown are per full serving. HydroPrime amount refers to branded ingredient weight. Alpha-GPC amount refers to approximate active Alpha-GPC yield.
Ingredient amounts transcribed from the Krayon Fuel tub label. Follow the label on the product you receive.
| Ingredient | 1 scoop | 2 scoops |
|---|---|---|
| Vitamin B2 (as riboflavin) | 0.85 mg65.5% DV | 1.7 mg131% DV |
| Vitamin B6 (as pyridoxal-5-phosphate) | 5 mg294% DV | 10 mg588% DV |
| Sodium (from pink Himalayan salt) | 200 mg8.5% DV | 400 mg17% DV |
| Potassium (from potassium citrate) | 65 mg1.5% DV | 130 mg3% DV |
| L-Citrulline | 4 g** | 8 g** |
| Beta-alanine | 1.6 g** | 3.2 g** |
| HydroPrime® glycerol powder (65%) | 1.5 g** | 3 g** |
| Betaine anhydrous (trimethylglycine) | 1.25 g** | 2.5 g** |
| L-Tyrosine | 1 g** | 2 g** |
| Taurine | 750 mg** | 1.5 g** |
| VasoDrive-AP® — IPP and VPP (from hydrolyzed milk casein) | 254 mg** | 508 mg** |
| Citriva™ bioactive flavanone glycosides (from Citrus sinensis L. fruit extract) | 200 mg** | 400 mg** |
| Alpha-GPC (L-alpha glycerylphosphorylcholine) | 150 mg** | 300 mg** |
| Rhodiola rosea root extract (3% rosavins, 1% salidroside) | 150 mg** | 300 mg** |
| Caffeine anhydrous | 125 mg** | 250 mg** |
| L-Theanine | 100 mg** | 200 mg** |
| AstraGin® — Panax notoginseng root extract and Astragalus membranaceus root extract | 25 mg** | 50 mg** |
DV = Daily Value. ** Daily Value not established. The tub provides 40 one-scoop servings or 20 two-scoop servings; these are tub counts, not sample-packet counts.
Other ingredients: citric acid, malic acid, natural & artificial flavors, silicon dioxide, beet root powder (as color), calcium silicate, sucralose, acesulfame potassium.
Manufactured in a facility that also processes milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soy, and sesame.
Citriva™ is a licensed trademark of Xanthin Research, Inc. VasoDrive-AP® is a registered trademark of Novanutra, Inc. AstraGin® is a registered trademark of NuLiv Science USA Inc. HydroPrime® is a registered trademark of INNB Nutrition.
A word from the founder
I’m Chris—a Recon Marine veteran and the founder of Krayon Fuel. I built this from the ground up, choosing each ingredient for a specific job. Your feedback matters to me. Try your sample, then tell me what you think.
Chris · Founder, Krayon Fuel™
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This product is only intended for use in healthy adults 18 years of age or older. Pregnant or nursing women should consult a physician before using this product. Do not use if safety seal is broken or missing. Keep out of reach of children.
California Proposition 65 warning: This product can expose you to chemicals including lead and mercury, which is known to the State of California to cause cancer. For more information, visit P65Warnings.ca.gov.