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Clean energy. Real focus. No crash.
Energy and focus
without the sugar or the crash.
Zero sugar. 249mg time-released caffeine from two sources. A real performance stack, Lion's Mane + Alpha-GPC for focus, L-citrulline for endurance. Informed Sport Certified.
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30-Day Money-Back Guarantee, keep the empties
- ✓ 0g sugar · no artificial colors · no crash
- ✓ Informed Sport Certified, safe for tested athletes
- ✓ Crafted in the USA · cans donated to frontline heroes
INFORMED SPORT
Certified · every batch
0gSugar
249mgTime-released
3Nootropics & aminos
0Crash
"Energized, ready to attack a workout, with prolonged performance benefits."
"I've never had an energy drink that makes me feel energized and ready to attack a workout that also has prolonged performance benefits. The blue raspberry flavour is also unbeatable in my books."
Jacob Bernard-Docker · Detroit Red Wings · NHL
Read the label on any other can. Then read ours.
Every energy drink says "clean." Then you flip the can. Here's the contrast that matters most:
0gUnderdog sugar
vs
27gLeading energy drink
| UNDERDOGBest choice | 300mg Spike Brand | Lifestyle Stim | Sugary Classic | |
|---|---|---|---|---|
| Sugar | 0g | 0g | 0g | 27g |
| Caffeine | 249mg · 2 sources | 300mg spike | 200mg spike | 114mg spike |
| Time-released caffeine | ✓ | ✗ | ✗ | ✗ |
| Real nootropics (Lion's Mane + Alpha-GPC) | ✓ | ✗ | ✗ | ✗ |
| L-Citrulline (endurance) | ✓ | ✗ | ✗ | ✗ |
| Informed Sport Certified | ✓ | ✗ | ✗ | ✗ |
| Fully disclosed doses (no prop. blends) | ✓ | ✗ | ✗ | ✗ |
| Artificial colors, flavors & sweeteners | None | Yes | Yes | Yes |
| Crash profile | None | Hard | Moderate | Sugar crash |
Comparison categories based on publicly available nutrition labels of leading competitor products. Brand names not used. Not affiliated with or endorsed by any referenced products.
Fully transparent. No proprietary blends.
Real ingredients at real doses, every one named on the can, with the exact amount. Here's what's actually inside.
175mg
Green Tea Caffeine
Fast-onset natural caffeine plus L-theanine for calm, jitter-free focus.
74mg
Di-Caffeine Malate
Slow-release caffeine that extends the curve instead of spiking and crashing.
★
Lion's Mane Extract
Clinical nootropic studied for memory, focus and cognitive support.
GeniusPure®
Alpha-GPC 99%
The highest-purity Alpha-GPC available, choline for sharper focus.
4g
L-Citrulline
Clinical-dose endurance amino acid for blood flow and oxygen delivery.
0g
Sugar
Naturally sweetened. No sugar, no artificial sweeteners, no crash.
0
Artificial Colors
No synthetic dyes, no artificial flavors, no preservatives. Ever.
✓
Banned-Substance Tested
Informed Sport Certified, screened for 250+ WADA-prohibited substances.
No proprietary blends. No trademarked ingredients with hidden doses. What's on the label is what's in the can.
How it actually feels.
Most energy drinks spike you in 45 minutes, then drop you off a cliff. Two caffeine sources release at different speeds, so you get a flatter, longer curve from minute 20 to hour 5. That's the mechanism behind "no crash", not a claim, chemistry.
Underdog, smooth, 5-hour curve
Ordinary stim, spike & crash
5 reasons people switch to Underdog.
If you're drinking a high-stim or sugary energy drink, here's what changes.
1
No more 2 p.m. crash
Two caffeine sources release at different speeds for usable energy that lasts, no spike, no cliff.
2
Focus, not just stimulation
Lion's Mane + Alpha-GPC give you the cognitive edge most energy drinks completely skip.
3
Zero sugar, zero junk
No sugar, no artificial colors, no proprietary blends. Naturally flavored and sweetened.
4
Safe for tested athletes
Informed Sport Certified, every batch screened for 250+ banned substances. Drink it and pass a test.
5
Energy with a mission
We donate cans to nurses, firefighters and frontline heroes. Your case fuels theirs.
What switchers are saying.
★★★★★
"I drank a 'lifestyle' energy drink for three years and didn't realize how bad my afternoon crashes were until I switched. Underdog gives me 6 hours of clean focus, no drop-off."
Marcus T., verified buyer
★★★★★
"I'm a competing powerlifter. Couldn't drink any energy drink before meets because of testing. This is the first one I trust, and it tastes great."
Jess R., verified buyer
★★★★★
"Switched my whole crew off the high-stim brand. Nobody's gone back. Patriot Pop is unreal."
Anthony D., verified buyer
▶ Real customer
▶ Real customer
▶ Real customer
▶ Real customer
▶ Real customer
▶ Real customer
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▶ Real customer
Now in 500+ doors across the Northeast
Find Underdog in a store near you
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Built by athletes, for the people who refuse to settle
Energy that earns its place in the can.
We didn't build Underdog to chase a category. We built it for athletes chasing PRs, frontline workers grinding long shifts, and competitors who can't risk a failed test. Five performance ingredients, fully disclosed, dosed to actually work.
And every order gives back. We donate cans to nurses, firefighters and first responders, the unsung heroes who give their all, day in and day out. Because real change takes real energy.
The Underdog team
Love it, or your money back.
Try a full case for 30 days. If it isn't the best energy drink you've had, send the empties back and we'll refund you, no hassle, no hard feelings. That's how confident we are in what's in the can.
Quick questions.
How much caffeine is in a can?
249mg total, time-released from two sources, 175mg green tea extract and 74mg di-caffeine malate. The two-source approach gives you an extended-release curve instead of a single 30-minute spike.
Will I crash?
No. The slow-release caffeine and L-theanine from green tea give you a smooth curve from minute 20 to hour 5, usable energy that tapers instead of dropping off a cliff.
What makes it "clean"?
Zero sugar, no artificial colors, no artificial flavors, no proprietary blends. Naturally flavored and sweetened, crafted in the USA, and Informed Sport Certified.
Is it really banned-substance tested?
Yes, every batch is Informed Sport Certified, screened for 250+ substances on the WADA prohibited list. You can drink it and pass a sanctioned test.
Can I cancel my subscription?
Anytime. Skip a delivery, change your flavors, or cancel in one click from your account, no phone call, no catch.
What if I don't like it?
30-day money-back guarantee.
When does it ship?
Orders ship in 1-2 business days from the US. Free shipping on orders $35+.
Fuel like an Underdog.
The cleanest energy you can buy. Banned-substance tested. Time-released. Optimally dosed. 30-day money-back guarantee.
Subscribe & Save $23.99 Or one-time $29.99 · Free ship $35+ · Cancel anytimeUnderdog 12-Pack Variety
★★★★★ 4.9 · from $23.99