KJ Labs

KJ Labs - Doomsday

$36.99 $49.99
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KJ Labs - Doomsday

KJ Labs - Doomsday

$36.99
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Liver & Organ Defender - 5% Nutrition by Rich Piana (270 Capsules)

Liver & Organ Defender - 5% Nutrition by Rich Piana (270 Capsules)

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USP Labs Jack3d Pre Workout - 45 Servings

USP Labs Jack3d Pre Workout - 45 Servings

$37.95 SAVE 42%
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KJ Labs Doomsday Pre-Workout is a no-compromise, hard-hitting pre-workout designed for lifters who thrive on intensity. Featuring a clinically dosed formula of pump agents, endurance enhancers, potent stimulants, and cognitive boosters, Doomsday gives you everything you need to obliterate your workout and leave nothing behind. This is the pre-workout for those who don’t believe in limits.


Key Benefits of Doomsday Pre-Workout

βœ… Extreme Energy – Dual caffeine sources plus DMBA and DMHA deliver powerful, long-lasting stimulation
βœ… Laser Focus – Phenyl Piracetam sharpens attention and cognitive drive
βœ… Massive Pumps – 6000mg of L-Citrulline promotes blood flow and muscle fullness
βœ… Endurance & Performance – Beta-Alanine and Theobromine delay fatigue and enhance output
βœ… Metabolic Activation – GBB helps support thermogenesis and fat-burning potential


Supplement Facts (Per Scoop – 12.86g)

  • L-Citrulline – 6000mg

  • Beta-Alanine – 3200mg

  • Caffeine Anhydrous – 350mg

  • Theobromine – 100mg

  • Guarana Extract (22% Caffeine) – 100mg

  • DMHA – 50mg

  • DMBA – 300mg

  • Phenyl Piracetam – 20mg

  • GBB – 20mg

Other Ingredients: Sucralose, Citric Acid, Malic Acid, Calcium Silicate, Natural and Artificial Flavors

Item Amount per serving % Daily Value
Serving Size 1 scoop (12.86 g)
Servings Per Container 25
L-Citrulline 6000 mg *
Beta-Alanine 3200 mg *
Caffeine Anhydrous 350 mg *
Theobromine 100 mg *
Guarana Extract (22% Caffeine) 100 mg *
DMHA 50 mg *
DMBA 300 mg *
Phenyl Piracetam 20 mg *
GBB 20 mg *
Other Ingredients Sucralose, Citric Acid, Malic Acid, Calcium Silicate, Natural and Artificial Flavors
  * Daily value not established.

Order with confidence we ship Monday–Friday, and orders placed before 2PM EST usually go out same day. Most customers receive their package in about 4 business days (up to 10 days with handling + transit). Enjoy $5.99 flat-rate shipping, or FREE US shipping over $65 (discount codes can’t stack). You’ll get tracked delivery confirmation on every order, and orders over $99 require a signature.

For extra peace of mind, add shipping insurance so any delivery issue can be handled with a Replacement/Refund/Reship if needed.

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