Science-forward performance support—formulated to power strength, focus, and recovery at the cellular level.

Clinically Dosed, No Blends
Powerful NAD+ Energy
Feel It in Minutes
NSF tested. GMP certified. USA made.
8-in-1 Stack, One Simple Routine

Customer Reviews

Based on 351 reviews
74%
(260)
8%
(29)
5%
(18)
4%
(15)
8%
(29)
J
Joseph Williams
Never recieved product

Never recieved product and waisted two weeks anxiously waiting nothing. I was assured after I didn't receive my product the first time & after verifying my shipping info again and still no product. SO DISAPPOINTED. I was grasping at anything to motivate me to start getting back in shape hopefully starting with your highly advertised product instead it's been a let down and blow to my beginning

C
Chris
Wow

Great Pre workout Love it

R
Ryan
Quit being greedy!

Why ruin a good thing for your greed? Mandating that your customers elect from a recurring payment scheme is the lowest and grimiest of tactics. You lost a customer for life!

B
Bret
I like your product but being self employed some weeks i can only make 3 days a week

I like your product but being self employed some weeks i can only make 3 days a week. So the email option to skip a month was a great courtesy. As the rest of the world greed has struck your company. Changing to automatic charge and send is just not caring about the customer only your own pockets

R
Rich
Great product

I have been using this product for years. My blood pressure and cardiac tests have all been excellent. I will continue to L- Arginine Plus as long as I am here. I am now 71 yrs. young.

Why Cellular Energy Matters

Your body runs on ATP. We include NAD+ precursors to support mitochondrial health, helping you recover faster, perform longer, and feel more energized—without overstimulation.

The Circulation Advantage

L-Arginine and Citrulline work together to boost nitric oxide, enhancing blood flow. Better circulation means more oxygen and nutrients to your muscles—so you can push harder with less fatigue.

Bathing Your Muscles in Nutrients

The old method of spiking heart rate and constricting blood vessels has met its match. We deliver nutrients where they matter—deep into muscle and connective tissue for sustained performance.

Quick Answers

What to expect, how it works, and why it’s different.

Learn More

What is GROmuscle™ and how does it work?

GROmuscle™ is a performance formula powered by NAD+ and L-Arginine to improve blood flow, deliver nutrients to muscle tissue, and support ATP production. Unlike stimulant-heavy pre-workouts, it energizes through enhanced circulation—not by overloading your nervous system.

What’s the “flush” sensation I feel?

That warm, tingling feeling is the NAD+ (niacin) flush. It means your blood vessels are opening, circulation is increasing, and the formula is actively delivering nutrients where your body needs them most.

Do I need to cycle off GROmuscle™?

No. GROmuscle™ is designed for daily, repeatable use without cycling. The ingredients support natural energy systems and recovery without overreliance on stimulants.

What makes GROmuscle™ different from typical pre-workouts?

Most pre-workouts force the body into overdrive with high caffeine and vasoconstriction. GROmuscle™ works with your physiology—flooding muscle tissue with nutrient-rich blood through NAD+, L-Arginine, and ATP-supporting compounds for sustained output.

Can I take GROmuscle™ even if I’m not training?

Yes. Many use it for focus, clarity, and clean energy on long workdays or physically demanding tasks. It’s built for performance—wherever yours lives.