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MASTERBOTH

Every person has two sides. The locked-in precision of Jekyll. The unrelenting drive of Hyde. Some days you need one. Some days you need everything.

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Product guarantees

  • banned substance banned substancetested
  • effectively effectivelydosed
  • #1 pre-workout #1 pre-workoutin the U.S.
  • no FD&C no FD&Cdyes

WHICH SIDERUNS TODAY?

Take the 30-second quiz. Get matched to your formula.

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ONE TUB.TWO FORMULAS.

Two independently sealed chambers. Zero cross-contamination. Scoop Jekyll, scoop Hyde, or scoop both — engineered so both formulas stay exactly as dosed.

ONE TUB.
  • DUAL CHAMBER LOCK:
    Two sealed compartments in a single tub keep each formula pure until the scoop hits.

  • INDEPENDENT DOSING:
    Full clinical dose in each chamber. Run one, run the other, or run both at full strength.

  • BUILT TO STACK:
    Jekyll's stim-free precision and Hyde's high-stim intensity are formulated to combine cleanly.

  • ONE SCOOP. TOTAL CONTROL:
    No mixing bowls, no guesswork. The tub does the separating so you can do the deciding.

FIVE Tubs.Zero Compromises.

Jekyll & Hyde Signature Dual Tub

Jekyll & Hyde Signature Dual Tub

Description

Jekyll & Hyde Signature Dual Tub combines two of our most popular pre-workouts in a single tub. Take Jekyll for stim-free focus and precision. Take Hyde for caffeinated energy and intensity. Combine them for the ultimate Focus + Energy workout, and unlock a brand-new flavor every time. Two formulas. One tub. Three flavors. Banned Substance Tested. †

How To Use

Dr. Jekyll Signature Suggested Use: Mix 1 serving (2 scoops) of Dr. Jekyll® Signature with 8-12 oz of cold water. Consume 15-30 minutes prior to exercise.

Mr. Hyde Signature Suggested Use: Mix 1 serving (2 scoops) of Mr. HYDE® Signature with 8-12 oz of cold water. Consume 15-30 minutes prior to exercise.

** Get ready for a tingle! Beta-Alanine may cause a tingling sensation that should fade in a few minutes.

Stack Jekyll & Hyde for the ULTIMATE workout experience!

Supplement Facts
Supplement Facts
Warnings and CA Warnings

WARNING: This product is intended for healthy adults, 18 years of age or older. Consult a physician prior to using this. Do not take if you are pregnant or nursing, if you have or suspect you may have a medical condition, or if you are taking any prescription or over-the-counter medications. Do not exceed recommended serving. Exceeding recommended serving may cause adverse health effects. Immediately discontinue use and consult a qualified medical professional if you experience any adverse effects. KEEP OUT OF REACH OF CHILDREN.

WARNING Mr. Hyde® Signature:
contains 200 mg of caffeine, the equivalent of approximately 2 cups of coffee and may not be suitable for individuals who are sensitive to caffeine. Too much caffeine may cause nervousness, irritability, sleeplessness, and occasional rapid heartbeat. Do not consume within 4 hours of bedtime. Do not take any other products that contain caffeine or stimulants while taking Mr. HYDE® Signature. KEEP OUT OF REACH OF CHILDREN.

WARNING FOR CALIFORNIA RESIDENTS: Consuming this product can expose you to lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov

 †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.

 
Store in a cool, dry place. Content sold by weight not volume, some settling may occur. Protect from heat, light and moisture. Tamper Evident: Do Not Use If Safety Seal Under Cap Is Broken or Missing.

Allergen Statement: Manufactured in a facility that also processes ingredients containing milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, sesame, and soy.
Gluten Free.

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Jekyll & Hyde Nightmare Dual Tub

Jekyll & Hyde Nightmare Dual Tub

23 Reviews
Description

Jekyll & Hyde Nightmare Dual Tub delivers the best of both worlds in one tub. Take Jekyll for focus and pumps, Hyde for intense energy, or stack them together for explosive performance. Powerful separately, explosive together. MASTER BOTH. †

How To Use

Dr. JEKYLL NIghtmare Suggested Use: Mix 1 serving (2 scoops) of Dr. JEKYLL Nightmare with 8-12 oz of cold water. Consume 15-30 minutes prior to exercise.

Mr. HYDE Nightmare Suggested Use: Mix 1 serving (2 scoops) of Mr. HYDE® Nightmare with 6-8 oz of cold water. Consume 15-30 minutes prior to exercise.

** Get ready for a tingle! Beta-Alanine may cause a tingling sensation that should fade in a few minutes.

Supplement Facts
Supplement Facts
Warnings and CA Warnings

WARNING: This product is intended for healthy adults, 18 years of age or older. Consult a physician prior to using this. Do not take if you are pregnant or nursing, if you have or suspect you may have a medical condition, or if you are taking any prescription or over-the-counter medications. Do not exceed recommended serving. Exceeding recommended serving may cause adverse health effects. Immediately discontinue use and consult a qualified medical professional if you experience any adverse effects. KEEP OUT OF REACH OF CHILDREN.

WARNING: Mr. HYDE® Nightmare contains 300 mg of caffeine, the equivalent of approximately 3 cups of coffee and may not be suitable for individuals who are sensitive to caffeine. Too much caffeine may cause nervousness, irritability, sleeplessness, and occasional rapid heartbeat. Do not consume within 4 hours of bedtime. Do not take any other products that contain caffeine or stimulants while taking Mr. HYDE® Nightmare.

WARNING FOR CALIFORNIA RESIDENTS: Consuming this product can expose you to lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov

 †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.

Store in a cool, dry place. Content sold by weight not volume, some settling may occur. Protect from heat, light and moisture.

Allergen Statement: Manufactured in a facility that also processes ingredients containing milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, sesame, and soy.

Purchase options

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Dr. Jekyll Nightmare Dual Tub

Dr. Jekyll Nightmare Dual Tub

8 Reviews
Description

This isn't your average stim-free pre-workout. Dr. Jekyll Nightmare is built for athletes who train with focus and intention. Fueled by nootropics and pump-enhancing ingredients, it delivers clarity, control, and uncompromising performance without caffeine. †

How To Use

Suggested Use: Mix 1 serving (2 scoops) of Dr. JEKYLL® Nightmare with 8-12 oz of cold water. Consume 15-30 minutes prior to exercise.

Supplement Facts
Supplement Facts
Warnings and CA Warnings

WARNING: This product is intended for healthy adults, 18 years of age or older. Consult a physician prior to using this, or any other dietary supplement. Do not take this product if you are pregnant or nursing, if you have or suspect you may have a medical condition, or if you are taking any prescription or over-the-counter medications. Do not exceed recommended serving. Exceeding recommended serving may cause adverse health effects. Immediately discontinue use and consult a qualified medical professional if you experience any adverse effects. KEEP OUT OF REACH OF CHILDREN.

WARNING FOR CALIFORNIA RESIDENTS: Consuming this product can expose you to lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov

†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.

Store in a cool, dry place. Content sold by weight not volume, some settling may occur. Protect from heat, light and moisture.

Allergen Statement: Manufactured in a facility that also processes ingredients containing milk, eggs, fish, shellfish, tree nuts, peanut, wheat, sesame, and soy.

Purchase options

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Mr. Hyde Signature Dual Tub

Mr. Hyde Signature Dual Tub

3 Reviews
Description

Mr. Hyde® Signature Dual Tub is a high-performance pre-workout that delivers lasting energy, sharp focus, and superior endurance through a fully disclosed blend of clinically studied ingredients. With 200mg of sustained Caffeine, 3g L-Citrulline, 2.5g Creatine, and Himalayan Rock Salt for electrolytes, it's built to power you through workouts, workdays, and everything in between. Two bold flavors—Blue Razz and Strawburst—combine into a third: Berry Punch. One tub. Three ways to enjoy.†

How To Use

SUGGESTED USE: Mix one serving (2 scoops) of Mr. Hyde Signature with 8oz of cold water. Consume 15 to 30 minutes before exercise. For enhanced performance, experienced users may take two servings (4 scoops).†
** Get ready for a tingle! Beta-Alanine has been shown to boost exercise endurance†, and it may cause some tingling — it'll fade in a few minutes. Time to get to work!

Supplement Facts
Supplement Facts
Warnings and CA Warnings

WARNING: Do not use if you are pregnant, nursing or if you are under the age of 18. Do not take this product if you have or suspect you may have a medical condition or if you are taking any prescription or over-the-counter medications. Consult a licensed qualified healthcare professional before using this or any other dietary supplement, especially if you have a medical condition, or a family history of medical problems including but not limited to: heart disease, thyroid disease, diabetes, high blood pressure, depression or other psychiatric condition, glaucoma, difficulty in urinating, prostate enlargement, or seizure disorder. Do not exceed 2 servings (4 scoops) per day. Immediately discontinue and consult a licensed qualified medical professional if you experience any adverse effects. One serving (2 scoops) of this product contains 200mg of caffeine, the equivalent of approximately 2 cups of coffee and may not be suitable for individuals who are sensitive to the effects of caffeine. Too much caffeine may cause nervousness, irritability, sleeplessness, and occasional rapid heartbeat. KEEP OUT OF REACH OF CHILDREN.

WARNING FOR CALIFORNIA RESIDENTS: Consuming this product can expose you to lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov

Store in a cool, dry place. Content sold by weight not volume, some settling may occur. Protect from heat, light and moisture. Tamper Evident: Do Not Use If Safety Seal Under Cap Is Broken or Missing.

Allergen Statement: This product is manufactured in a facility that processes other products which may contain milk, eggs, nuts, fish, wheat, and soy.
Gluten Free.

 †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.

 

Purchase options

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Mr. Hyde Nightmare Dual Tub

Mr. Hyde Nightmare Dual Tub

6 Reviews
Description

Mr. Hyde Nightmare was built for athletes who push the edge of intensity, physically and mentally. This formula delivers hard-hitting energy, laser-sharp focus, and performance amplification through a fully disclosed blend of clinically studied ingredients. †

How To Use

SUGGESTED USE: Mix one serving (2 scoops) of Mr. Hyde Nightmare with 8oz of cold water. Consume 15 to 30 minutes before exercise.

Assess tolerance by taking 1/2 serving the first time. Do not consume within 4 hours of bedtime. Do not take any other products that contain caffein or stimulants while taking Mr. Hyde Nightmare.

** Get ready for a tingle! Beta-Alanine may cause a tingling sensation that should fade in a few minutes.

Supplement Facts
Supplement Facts
Warnings and CA Warnings

WARNING: Do not use if you are pregnant, nursing or if you are under the age of 18. Do not take this product if you have or suspect you may have a medical condition or if you are taking any prescription or over-the-counter medications. Consult a licensed qualified healthcare professional before using this or any other dietary supplement, especially if you have a medical condition, or a family history of medical problems including but not limited to: heart disease, thyroid disease, diabetes, high blood pressure, depression or other psychiatric condition, glaucoma, difficulty in urinating, prostate enlargement, or seizure disorder. Do not exceed 1 serving (2 scoops) per day. Immediately discontinue and consult a licensed qualified medical professional if you experience any adverse effects. One serving (2 scoops) of this product contains 300mg of caffeine, the equivalent of approximately 3 cups of coffee and may not be suitable for individuals who are sensitive to the effects of caffeine. Too much caffeine may cause nervousness, irritability, sleeplessness, and occasional rapid heartbeat. KEEP OUT OF REACH OF CHILDREN.

WARNING FOR CALIFORNIA RESIDENTS: Consuming this product can expose you to lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov



Store in a cool, dry place. Content sold by weight not volume, some settling may occur. Protect from heat, light and moisture. Tamper Evident: Do Not Use If Safety Seal Under Cap Is Broken or Missing.



Allergen Statement: This product is manufactured in a facility that processes other products which may contain milk, eggs, nuts, fish, wheat, and soy.
Gluten Free.

†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.

Purchase options

Deliver Every

FIND YOUR FORMULA -STIM

Stim pre-workout formula comparison
product name Dr. Jekyll Signature Dr. Jekyll Signature Mr. Hyde Nightmare Mr. Hyde Nightmare Mr. Hyde Xtreme Mr. Hyde Xtreme Mr. Hyde Infinite Mr. Hyde Infinite
caffeine200mg300mg462.5mg190mg
HYDRATION
Banned Substance Tested
Creatine Monohydrate2.5 g0 g2.5 g2.5 g
Betaine anhydrous1g0g0g1.5g
BETA ALANINE2g3.2g3.2g3.2g
citrulline3g6g3g5g
ENERGY🔴🔴⭕⭕🔴🔴🔴⭕🔴🔴🔴🔴🔴🔴🔴⭕
FOCUS🔴🔴⭕⭕🔴🔴🔴⭕🔴🔴🔴⭕🔴⭕⭕⭕
PUMPS🔴⭕⭕⭕⭕⭕⭕⭕🔴🔴⭕⭕🔴🔴🔴🔴

FIND YOUR FORMULA -STIM-FREE

Stim-free pre-workout formula comparison
product name Dr. Jekyll Signature Dr. Jekyll Signature Mr. Hyde Max Pump Mr. Hyde Max Pump Dr. Jekyll Nightmare Dr. Jekyll Nightmare
caffeine0mg0mg0mg
HYDRATION
Banned Substance Tested
Creatine Monohydrate2.5g0 g0 g
Betaine anhydrous0g3g2g
BETA ALANINE3.2g3.2g0g
citrulline0g4g6g
ENERGY🔴⭕⭕⭕⭕⭕⭕⭕🔴⭕⭕⭕
FOCUS🔴🔴🔴⭕⭕⭕⭕⭕🔴🔴🔴🔴
PUMPS🔴🔴⭕⭕🔴🔴🔴🔴🔴🔴⭕⭕

MORE WAYS TOSTACK

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  • Mr. Hyde Signature V2

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  • Dr. Jekyll Nightmare

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  • Mr. Hyde Nightmare V2

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  • Mr. Hyde Xtreme

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  • Pro Series Mr. Hyde Infinite Fully Dosed Pre-Workout

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  • Mr. Hyde Signature On-The-Go 12 Sticks

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30 Million Workouts PER MONTHFueled by JEKYLL & HYDE

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RESULTS DON'T LIE.

QUESTIONS.ANSWERED.

What is the Dual Tub format?

One tub, two sides — but not always the same kind of split. Some Dual Tubs are dual-flavor: the same formula in two flavors, sealed separately, that combine into a third flavor when you mix them. Others are dual-formula: Jekyll on one side, Hyde on the other, each independently dosed — and those flavors combine into a third flavor too. Either way, nothing crosses over until you decide to mix it, so you're always in control of what you're running and how it tastes.

Dual-Flavor Tubs (same formula, two flavors → third flavor blend): Mr. Hyde Signature Dual Flavor Tub, Mr. Hyde Nightmare Dual Flavor Tub, Dr. Jekyll Nightmare Dual Flavor Tub

Dual-Formula Tub (two formulas, two flavors → stacked formula + third flavor blend): Jekyll & Hyde Nightmare Dual Formula Tub and Jekyll & Hyde Signature Dual Formula Tub

What is the difference between Jekyll and Hyde products?

Jekyll products are stimulant-free and focus on enhancing mental clarity, blood flow, and mind-muscle connection without caffeine. Hyde products are stimulant-powered formulas designed to increase energy, drive, and adrenaline. Both lines can be used individually or stacked for a customizable pre-workout experience depending on your training goals and caffeine preference.

Can I stack Jekyll & Hyde together?

Yes. They're designed to work together. Jekyll is completely stim-free, so it complements Hyde's caffeine perfectly. Start with a half scoop of each to assess tolerance.

What is the difference between Mr. Hyde Signature & Mr. Hyde Nightmare?

Mr. Hyde Signature is a more approachable daily pre-workout with a moderate stimulant load and flexibility for one or two scoops. Mr. Hyde Nightmare delivers a higher stimulant dose with advanced nootropics, pump ingredients, and performance drivers for those who want an extra edge. †

What is the difference between Dr. Jekyll Signature & Dr. Jekyll Nightmare?

Signature is your daily driver — 6g citrulline and 1.5g betaine anhydrous for clean, stim-free pumps and steady endurance support, built for consistent training rather than just max-effort days. Nightmare is that same precision, maximized — 12g citrulline, a 4,700mg nootropic complex, and 2g betaine anhydrous for elevated focus and full-spectrum pumps. Both are completely stim-free, so the difference isn't caffeine — it's dose and depth, Signature for every day, Nightmare for when you've outgrown it.

What formula should I take for an evening workout?

Run Jekyll for evening sessions. Zero caffeine, all focus.

How do I know if I should use Jekyll or Hyde?

Take the 60-second quiz, or think about your training day: need clarity and control, run Jekyll. Need power and intensity, run Hyde. Need both, stack them. Click here to take the quiz.

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