P.P.K. is a science-backed pre-workout formula that helps increase muscle pumps, strength, power, lean muscle, and energy.* The key ingredients in P.P.K.™ have been scientifically shown to support: - 147% Greater Increase in Total Strength Over Training Alone*(1) - 54% Increase in Blood Flow Immediately Following Exercise vs Placebo Group*(2) - 30% Increase in Power Output Over Placebo*(1) - Increase in Lean Body Mass* - Mental Clarity, Improve Concentration, and Enhanced Cognitive Function* -Long Duration, Muscular Endurance and Higher Volume Workouts* (1) Wilson JM, Joy JM, Lowery RP, Roberts MD, Lockwood CM, Manninen AH, Fuller JC, De Souza EO, Baier SM, Wilson SMC, Rathmacher JA. Effects of oral adenosine-5’-triphosphate supplementation on athletic performance, skeletal muscle hypertrophy and recovery in resistance-trained men. Nutr Metab. 10; doi: 10.1186/1743-7075-10-57, 2013. (2) Jager R, Roberts MD, Lower RP, Joy JM, Cruthirds CL, Lockwood CM, Rathmacher JA, Purpura M, Wilson JM. Oral adenosine-5’-triphosphate (ATP) administration increases blood flow following exercise in animals and humans. J Int Soc Sports Nutr. 11; doi:10.1186/1550-2783-11-28, 2014. *The Statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Next Level Workouts. Our new, Woke AF pre-workout flavors may be sweet, but when it comes to intense focus, insane pumps, and freakish energy. We don't play around.

• Tri-stim energy experience
• Promotes explosive pumps
• Supports muscular endurance
• Formulated with AI-discovered peptides
• Hawaiian Punch^® Fruit Juicy Red flavor

Make your training hit harder than ever with C4 Ultimate. This cutting-edge pre-workout delivers the ultimate high-stim experience with TeaCrine^®, Dynamine™, and 300mg of caffeine, while promoting enhanced performance, hard-hitting pumps, and increased muscular endurance with ingredients like PeptiPump^® and CarnoSyn^®.

Frequently Asked Questions

What is TeaCrine?

TeaCrine is a patented compound that supports increased energy, mood, and focus when combined with caffeine.

What is Dynamine?

Dynamine is an alkaloid that complements caffeine to support increased energy.

What is PeptiPump?

PeptiPump is an AI-discovered designer peptide exclusively found in C4. It supports increased pump and training performance.

What is CarnoSyn?

CarnoSyn is a globally patented form of beta-alanine that is known to enhance muscular endurance.

• Essential amino acid delivery
• Supports energy, focus, and muscle recovery
• Promotes nitric oxide production
• Caffeine derived from natural sources
• Concord Grape flavor

Looking for the perfect pre-workout boost or anytime pick-me-up? ESSENTIAL AMIN.O. ENERGY by Optimum Nutrition supports muscle recovery before, during, and after exercise with 5g of micronized free-form amino acids—plus 100mg of caffeine to promote energy and focus.

Frequently Asked Questions

What are essential amino acids?

Essential amino acids (EAAs) are amino acids that your body can’t produce enough of on its own, including leucine, isoleucine, valine, histidine, lysine, methionine, phenylalanine, threonine, and tryptophan. EAAs support muscle growth and recovery.

What are micronized free-form amino acids?

Micronized free-form amino acids are single amino acids that are already in a pre-digested form for faster absorption by the body.

Why is nitric oxide important?

Nitric oxide plays a key role in exercise endurance because it’s a vasodilator. A vasodilator is a substance that supports the dilation of blood vessels for increased blood flow.