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I am up at 4:45am every morning and this really gets me going for my workout! I love the burn, the sweat, it really makes me feel like I’m putting in the work! Re-ordered 4 more!

Jason T. Verified Buyer

1 Shot = Complete Fat-Burning Activation

4.7 from 3,037 reviews

Alpha Lion · Stim-Free Liquid Fat Burner

BURN2O

The world's only stim-free fat burner that fuels every step of fat-burning in a single liquid shot — feel it in ~15 minutes.†

Turn fat into fuel — Activate, Mobilize, Burn — without a single drop of caffeine. A research-backed formula with every dose on the label: no proprietary blends, no fairy dust. Works on top of your training and deficit — no jitters, no crash — and third-party tested by Eurofins.

⚡ The Complete 3-Step System — Stim-Free†Zero CaffeineFeel It In ~15 Min†Third-Party Tested

🏆 GNC's #1 Selling Thermogenic🔬 Third-Party Tested by Eurofins🛡️ 365-Day Money-Back Guarantee🚚 Free Shipping · Ships in 24 Hours🧪 Every Dose Printed — No Blends☕ Zero Caffeine · Zero Sugar

†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.

Select flavor

Fiery PunchTropical Fruit Punch

GrapezillaGrape Bubblegum

Shred berryStrawberry & Vanilla

Sour Gummy WormSour Gummy Worm

Most popular /mo

Best results /mo

Free shipping /mo

Refill Ships in 4 weeks
Change or Cancel Anytime

How Does Burn2O Work?

Burn2O combines 4 patented ingredients that work synergistically to torch fat through multiple pathways:

MitoBurn® converts white fat to brown fat for 5.3X more cellular fat burning
CaloriBurn GP® activates brown adipose tissue, raising metabolic rate by 400% within 30 minutes
L-Carnitine (2000mg) shuttles fatty acids into mitochondria to be burned as fuel
GBB increases carnitine levels up to 300%, creating intense thermogenesis you can feel

Is It Easy To Use?

Incredibly simple. Just take 1 tablespoon (15ml) like a shot. No mixing, no measuring, no hassle.

The delicious liquid formula absorbs instantly for rapid results.

Take it before workouts to amplify fat burning, or on rest days to keep your metabolism firing 24/7.

What Fat Areas Does It Target?

While Burn2O increases overall fat burning in all areas, clinical studies show it also specifically targets visceral belly fat - the dangerous fat around your organs.

CaloriBurn GP® has been proven to reduce visceral fat area in just 4 weeks, while the thermogenic blend helps burn stubborn fat from all areas.

What's Included If I Buy Today?

365 Money-Back Guarantee

We're so confident Burn2O will transform your fat loss that we offer a full year to try it.

If you don't experience dramatic fat burning, increased energy, and visible results, simply return it for a complete refund. No questions asked.

For full terms and conditions, please see our Terms of Sale.

Shipping & Returns

Your Burn2O ships within 24 hours and typically arrives in 3-5 business days.

Returns are simple - just contact our customer service team and we'll handle everything.

Now available at

GNC
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🏆 GNC's #1 Thermogenic

★★★★★
“I lost 224 pounds. This stuff works like magic. Out of my six years of my weight loss journey, Burn2O has been the best fat burning supplement there is out there. Highly recommend.”

Elmer Linares Verified Purchase
★★★★★
“5 months ago, was at 292. Last week, weighed in at 204. Really gets those thermogenics going and gets my sweat going.”

Sam Portesi Verified Purchase
★★★★★
“Energy level was amazing. I dropped around 20 to 25 pounds after I started Burn2O. I was in preparation... and one of the reasons that I got all those medals in that physique is thanks to Alpha Lion.”

Maria Quintero Verified Purchase
★★★★★
“I was basically stuck and plateaued. I bought these pair of jeans two years ago and until taking this I could not fit in them and I'm happy to say they feel great and I feel great.”

Austin A. Verified Purchase
★★★★★
“Just a little over 60 days and I've lost almost 60 lbs. I've never sweat like that my entire life.”

Bobby Geraghty Verified Purchase
★★★★★
“I was 417 pounds. Fast forward to today... I am at a stronger and healthier 248 pounds. This stuff is incredible. Tremendous, tremendous flavor.”

John Campuzano Verified Purchase
★★★★★
“I lost 22 lbs and 5% body fat in 30 days. I wanted to be confident at the beach and not have a beer belly.”

Kareem Thomas Verified Purchase

Individual results vary and are not typical. These customers combined BURN2O with a calorie deficit and regular exercise. BURN2O supports — it does not replace — diet and training.†

Step 01 Activate Send the "burn fat" signal
→
Step 02 Mobilize Carry fat to the engine
→
Step 03 Burn Turn it into heat
→
The payoff — the whole system, felt You Feel It In ~15 min†

BURN2O fuels all three steps — caffeine-free — and you feel it working in ~15 minutes.† Here's each step: what jams it, and what we put back.

Step 01
Activate
MitoBurn® (L-BAIBA) · 500 mg
Why it jams
- You're not moving enough.L-BAIBA — the "burn fat now" signal — is only made when muscles work. Sit all day and the signal barely fires.
- Age turns the volume down.You make less of the signal and have less active brown fat to receive it. The system weakens at both ends.
- Less muscle, smaller factory.The signal comes from muscle — less of it means less signal.
What BURN2O puts back
MitoBurn® delivers the same exercise-signal molecule your muscles release when you train — even on a rest day.†

5.3X Increased cell ability to burn fat through thermogenesis†Cell / preclinical research†
Step 02
Mobilize
L-Carnitine · 2,000 mg + GBB · 25 mg
Why it jams — this is the bottleneck
- Your forklifts thin out.Carnitine is the carrier that hauls fat into the engine, and levels drop with age — so fat queues at the door instead of getting burned.
- Modern eating jams the door.A high-carb, over-fed day partly closes the carnitine gate, so even available fat can't get in.
- It's the whole chain's slowest point.When transport lags, everything downstream stalls — no matter how good your signal is.
What BURN2O puts back
A full 2,000 mg of L-Carnitine — the dose used in the research — plus GBB, which supports your body's own carnitine production to keep the door open.†

4.59 LBS In a 37-trial meta-analysis, people taking L-carnitine lost 4.59 lbs more body fat on average than the placebo group — on the same diet†Human meta-analysis, at the dose we use
Step 03
Burn
CaloriBurn GP® · 10 mg
Why it jams
- Your furnace shrinks.Calorie-burning brown fat fades from roughly half of young adults (23–35) to about 8% by middle age (38–65).
- Some are born with a smaller one.How much brown fat you carry is largely inherited — body weight is 40–70% genetic.
- The usual "fix" backfires.Most burners force the furnace with caffeine — but around half of people carry a slow-caffeine gene and feel worse for it.
What BURN2O puts back
CaloriBurn GP® — grains of paradise, which supports brown-fat thermogenesis and turns stored fuel into heat, without a milligram of caffeine.†

🔥 Supports brown-fat thermogenesis — the calorie-burning, heat-making tissue — caffeine-free.†
The payoff — the whole system, felt
You Feel It
In ~15 minutes · zero caffeine
Here's the part every capsule misses: you can't feel it working, so you quit. Plenty of fat burners get abandoned early for exactly that reason. BURN2O drives a genuine thermogenic warmth you notice in ~15 minutes — real proof the full formula switched on, with zero caffeine faking it.†
What that actually feels like

0–15 min

One liquid shot — nothing to disintegrate first, unlike a capsule.

~15 min

The warmth builds. A gentle heat, a light sweat as you start moving.†

Your session

Train inside the warmth window. Users describe it as feeling the work — with zero caffeine.†

†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. Ingredient statistics reflect published studies on the individual named ingredients at the doses used in those studies — not clinical trials of this finished product. Results require a calorie deficit and regular exercise; individual results vary.

Recommended by America's Greatest Experts.

Ken Griffey Jr · Alpha Lion Athlete Program
Big Ron Jones · Alpha Lion Athlete Program

“I recommend Burn2O because it fits into real life. It's stimulant-free, easy to use, and I've personally enjoyed how it complements my training without adding another heavy stimulant to my day. It's something I actually use, and I'm comfortable recommending it.”

Big Ron Jones · Alpha Lion Athlete Program

Sour Gummy WormTangy sour candy worms — playful, puckering, packed with nostalgia.
GrapezillaNostalgic grape bubble gum — fun, fruity, irresistibly sweet.
Fiery PunchExplosive tropical fruit punch — bold and refreshing, summer in a bottle.
Shred BerrySweet strawberry meets creamy vanilla — smooth, satisfying, balanced.

Step 01Pour one shot15mL — straight from the bottle or into water. 31 shots per bottle.
Step 02Take it before you move15–30 minutes before training. Zero caffeine means an evening session is fine too.
Step 03Feel it, then trainThe warmth builds within ~15 minutes.† Then you do the work it's there to amplify.

Nothing hidden. Nothing to look up.

Four actives. Four doses, printed. No proprietary blends, no "energy matrix," no rounding up. If you're the kind of buyer who reads the panel before the promise — read it.

We also print the part most brands leave out: which of these figures come from human research and which are mechanism-level. It's all in the FAQ below.

What's in one 15mL shot

L-CarnitineMobilize — fatty-acid transport2,000 mg
MitoBurn® (L-BAIBA)Activate — exercise-signal support500 mg
GBBFeel It — the felt warmth25 mg
CaloriBurn GP®Burn — thermogenesis support10 mg

The full panel

Zero sugar. Zero caffeine. Zero stimulants of any kind. The complete supplement facts, exactly as printed on the bottle.

Month 1"It's actually working"
From the very first shot, a warm flush and light sweat about 15 minutes in — the signal it's on board.† Through month 1 the fat-release signal stays switched on and the daily shot becomes a frictionless habit: no jitters, no crash, sleep intact.
Month 2Steadier, more usable energy
As the Mobilize step hits its stride, carnitine carries released fat to be used for fuel instead of re-stored — so your body turns fat into usable energy.† Training feels a little easier to sustain.
The month-2 shift is what people typically notice — not a studied milestone.
Month 3The scale & the mirror start to move
The visible fat-loss difference the research describes — on top of the deficit and training you're already doing.† In studies, paired with a calorie deficit, people lost about 4.6 lb MORE fat than the group who didn't.
A study result, and effort-dependent — never a guarantee of your result.

Why a 90-day run: it maps to the carnitine study windows (~8–12 weeks) and your 365-day guarantee — so giving it a real 90 days is an honest, low-pressure ask, not a gamble.

⚡Sustained energy Your fat becomes usable fuel — so you feel energised, not flat, even in a deficit.†
🏋️Better workouts Supports endurance and aerobic capacity (VO2 max).†
🔄Faster recovery Less soreness and muscle fatigue between sessions.†
😌Zero jitters, anytime No caffeine crash, sleep-safe, and it stacks on your coffee or pre-workout.

Why the shot wins

Stim-free. Every step. The only one you shoot & feel.

Three things have to be true for a fat burner to actually earn its place — and BURN2O is built on all three at once: it fuels every step of the burn (Activate · Mobilize · Burn), it does it with zero stimulants, and it comes in a fast-acting liquid shot you feel in ~15 minutes.† That's the whole formula, working — no caffeine, no capsules, no tub to stir.

All 3 steps Activate · Mobilize · Burn

Zero stimulants No caffeine, no jitters, sleep-safe

Fast-acting liquid Pre-dissolved · felt in ~15 min†

Only BURN2O The full stim-free chain — in a shot you feel, not a powder you stir.

Product	Caffeine Free	ActivateBAIBA	MobilizeCarnitine/GBB	BurnThermo	Fast-Acting Liquid
BURN2O	Yes	Yes	Yes	Yes	Yes
Ghost Burn	No	Yes	Yes	Yes	No
Transparent Labs (stim-free)	Yes	No	No	Yes	No
Kaged Clean Burn	No	No	Yes	Yes	No
RYSE Loaded Burner	No	No	Yes	Yes	No
Cellucor C4 Ripped	No	No	Yes	Yes	No
Alani Nu Fat Burner	No	No	No	Yes	No
Hydroxycut	No	No	No	Yes	No

The complete system — stim-free, and in a shot you feel.

Most burners cover a step or two and lean on caffeine for the rest. BURN2O runs the entire chain — Activate, Mobilize, Burn — with zero stimulants, delivered in a fast-acting liquid shot that goes to work the moment it hits your system, felt in ~15 minutes.† Complete, stim-free, and fast — that's the combination, and it's the whole point.

Re-verify all competitor formulas against live labels before publish

Comparison of common products in each class on published ingredient info; not exhaustive, and competitor formulas change — re-verify before publish. Compares stim-free status, step coverage and format, not doses.

The 30-Day Fat-Loss TestFive real people, one daily shot, 30 days — the whole thing on camera.
Stim-Free Calorie-BurnWe measured what one shot actually does — filmed start to finish.

Brand-produced content. Individual results shown depend on diet and exercise.†

#1 Selling thermogenic at GNC
4.7★ from 3,037 reviews · 82% five-star
9,423,390+ Servings sold worldwide
365-Day Risk-free money-back guarantee

🔬 Third-Party Tested by EurofinsIndependently tested by Eurofins — one of the world's largest analytical testing networks. Made in FDA-registered facilities following cGMP standards.(FDA registration is not FDA approval — no supplement is FDA-approved. We'd rather say that than imply otherwise.)
🧪 Every Dose PrintedFour actives, four numbers, zero proprietary blends. You can check every one against the research — which is the point. Brands hide doses when the doses can't survive daylight.
🦁 Built by Troy "Superhuman" AdashunAlpha Lion's co-founder formulates in the open and puts his name on it. Not a white-label formula with a logo dropped on the bottle.
🤝 ~1.99M Children HelpedEvery order supports Alpha Lion's giving program — nearly two million children reached to date (per alphalion.com).

Why we can print every dose

Most fat burners hide their doses behind a "proprietary blend" — because a hidden number is a number that can't be checked. We print all three, because the argument for BURN2O is the complete stim-free system, not a milligram contest. Read the panel, check the research, then feel it work in ~15 minutes. That's the whole pitch.

Try it for a full year. Seriously.

If BURN2O isn't for you — even if the bottle is empty — return it any time within 365 days for a complete refund. And you keep the free gifts.

Refund even on empty bottles
Keep every free gift
Direct purchases
Full refund policy

Want faster results?

One shot covers your day. Two covers your whole burn.

Here's the gap BURN2O alone leaves: it's stim-free by design, so it doesn't sharpen training intensity — the extra reps, the harder push, the calories you burn in the session. Pair your daily shot with Superhuman Burn, the fat-burning pre-workout, and you cover both windows: a harder session and all-day thermogenesis.

The Stubborn Fat Loss Stack Save 33%

Two products. Two windows. One routine.

Superhuman Burn — pre-workout powder (21 servings). Mix & drink 20 min before training for clean energy and a harder session, so the workout itself burns more.†Works while you train
BURN2O — stim-free liquid shot (31 servings). Your daily 5-second thermogenic that keeps the Activate·Mobilize·Burn system running around the clock.†Works while you don't

Together they hit stubborn fat on training days and rest days. 365-day guarantee covers the bundle too.

$87.00~~$129.98~~

The Stack · Save 33%

Everything you're wondering

Questions, answered straight.

I've been burned by fat burners before. Why is this different?

Burn2O is a stimulant-free liquid formula built around four transparently dosed ingredients: L-Carnitine, MitoBurn®, CaloriBurn GP®, and GBB. It is designed to support thermogenesis and fat metabolism without caffeine, harsh stimulants, proprietary blends, or the crashes commonly associated with stimulant-based fat burners.

Do I need to diet and train for this to work?

Burn2O is designed to support your nutrition and training, not replace them. For best results, use it consistently alongside a calorie-controlled diet and regular exercise. Individual results vary.

Do fat burners even work without caffeine?

Thermogenesis does not have to depend on caffeine. Burn2O uses L-Carnitine, MitoBurn®, CaloriBurn GP®, and GBB to support fat metabolism and thermogenesis while remaining stimulant-free.

What exactly is in it, and at what doses?

Each serving contains four patented or clinically studied ingredients at transparent doses:

L-Carnitine (2,000 mg) supports the transport of fatty acids into mitochondria.
MitoBurn® (500 mg) is a patented form of L-BAIBA.
CaloriBurn GP® (10 mg) is a standardized Grains of Paradise extract.
GBB (25 mg) is a precursor to carnitine that supports thermogenesis.

No proprietary blends or hidden ingredient amounts.

When will I feel it — and when will I see it?

Some people notice thermogenic warmth or increased sweating within 15-30 minutes. Changes in body composition take consistent use alongside an appropriate diet and training plan; timing and results vary by person.

Can I take it in the afternoon or evening?

Burn2O contains no caffeine or other stimulants, so it can be taken in the afternoon or evening. Follow the label directions and consider your individual response when choosing the best time to take it.

Is it for women as well as men?

Yes. Burn2O is formulated to support fat metabolism and thermogenesis in adults, men and women alike — none of its four ingredients (L-Carnitine, MitoBurn®, CaloriBurn GP®, GBB) are gender-specific or hormone-based. As with any supplement, individual results vary.

Can I stack it with my pre-workout or creatine?

Because Burn2O is stimulant-free, it can generally be stacked with pre-workout, protein, creatine, multivitamins, and amino acids. Avoid combining it with another thermogenic fat burner unless a qualified healthcare professional has reviewed the combination.

How does the subscription work?

You're billed automatically at your locked rate on each shipping interval. You can skip a shipment, pause, switch flavors, or cancel at any time from your account — no fees, no minimum commitment. Prefer to try it once first? A single bottle with no subscription is available for $59.99.

Is it third-party tested?

Yes. Burn2O is manufactured in an FDA-registered, cGMP-certified facility and is third-party tested for purity and potency.

What if it doesn't work for me?

Direct purchases are covered by our 365-day money-back guarantee. If Burn2O is not for you, you can return it within one year - even if the bottle is empty - for a refund and keep the included gifts.