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GNC Pro Performance® Thermo Burst™ Hardcore image
 
(based on 29 ratings)
Brand: GNC PRO PERFORMANCE
Located in: , ,
  • Powered With 400 MG OF Caffeine and MicronizedL-Carnitine For ExplosiveEnergy*
  • Clinically ProvenThermogenic BlendImproves Endurance andAthletic Performance*
  • Helps You Burn 12 Times More Calories After YourWorkout*


New and improved! Now more powerful than ever, GNC ProPerformance┬« Thermo Burst™ Hardcore intensifies your workout energy, helps you burn more calories and enables you to work out longer and harder! It features clinically proven thermogenic blendsshown to improve finish time by nearly five minutes and help pushyour endurance performance to higher levels.*

Each serving combines 400 mg of caffeine with technologyenhancedred and black pepper extracts and other superiorcomponents proven to provide calorie-burning effects. In fact, it'sbeen clinically shown to burn 12 times more calories and increasemetabolism before, during and after exercise.

Study participants taking the blends in Thermo Burst™ Hardcorereported that they felt less tired while working out.‡* In addition toingredients that promote a thermogenic response and support yourgoal of improved physical activity, Thermo Burst™ Hardcore alsosupplies micronized L-carnitine to help convert fatty acids into energy.*

^In a double blind, randomized, placebo controlled cross-over study, 25 subjectsexercised on a treadmill on two occasions. On one occasion the subjects tookthe herbal blend in GNC Pro Performance┬« Thermo Burst™ Hardcore 60 minutesbefore exercise and on the second occasion, they took a placebo. When thesubjects took the herbal blend in GNC Pro Performance┬« Thermo Burst™Hardcore, they burned three times more calories before, 3% more calories duringand 12 times more calories for up to one hour after exercise compared to whenthey took the placebo. This resulted in an average cumulative total of 278 morecalories burned before, during and after exercise compared to placebo.GNC QUALITY COMMITMENT

GNC, the leader in the development and manufacture of dietarysupplements, is committed to producing the highest qualityproducts available. This commitment begins with qualitydesigned supplement formulations. Every raw material thatgoes into a GNC supplement is guaranteed as to quality andpotency. Each product is dated and then shipped immediatelyto our stores, so you can be sure you are purchasing thefreshest supplements available. At GNC, we extend our qualitycommitment to you by offering our money-back guarantee.

Review Snapshot®
Avg. Customer Rating:
 
3.9 stars
(based on 29 reviews)
89% of respondents would recommend this to a friend.

Customers most agreed on the following attributes:

Pros:
Easy to use(23), Effective(22), Good smell(4), Good value(18), Lightweight(6)
Cons:
Not effective(4), Poor texture(3)
Best Uses:
Before workout(3), Daily use(19), Men(7), On-the-go(5), Women(3)
Describe Yourself:
Brand buyer(10), Budget shopper(15)
My Beauty Routine Takes:
1+ hour(6), 10 minutes(4), 30 minutes(8)
 
good stuff
By dominguez.danielVerified Purchaser from san antonio tx on 9/13/2011
Pros:
Easy To Use, Effective, Good Value
Best Uses:
Daily Use
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
30 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

good product...drink with plenty of water...stings the tongue if you dont swallow fast

 
Works
By mvtlirwinVerified Purchaser from Prescott, AZ on 9/12/2011
Pros:
Easy To Use, Effective
Best Uses:
Daily Use
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Definatly increases your body temp. I sweat much more during my workouts when I take this product. It does have a very strong taste, not a bad taste, but very strong. Catch it when it's on sale at [$] and it is an excellent deal.

 
GREAT
By DCB01Verified Purchaser from VA on 9/8/2011
Pros:
Easy To Use, Effective, Good Value
Best Uses:
Daily Use, Men, Women
Describe Yourself:
Brand Buyer
My Beauty Routine Takes:
30 Minutes

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Quick energy right when you need it.
I take it 20 minutes before a workout - with great energy results !

 
Great product for the price
By ChicoVerified Purchaser from paramount ca on 9/8/2011
Pros:
Easy To Use, Good Value
Best Uses:
Men, Women
Describe Yourself:
Budget Buyer
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

It does what it said. Help burn more calories .

 
Great!!!
By PizarroVerified Purchaser from dee, wv on 9/1/2011
Pros:
Easy To Use, Effective, Good Value
Cons:
No Cons
Best Uses:
Daily Use
Describe Yourself:
Brand Buyer
My Beauty Routine Takes:
10 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Great product

 
Love this!
By quiknik15Verified Purchaser from New York, NY on 8/8/2011
Pros:
Easy To Use, Effective, Good Value, Lightweight
Cons:
Smells and tastes weird
Best Uses:
On-the-go
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
30 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

I take this an hour before workout and i got the most energy and strenght i need for lifting weights.

 
great
By rex001234Verified Purchaser from seattle, wa on 8/6/2011
Pros:
Effective
Best Uses:
Before workout
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
1+ Hour
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

this is a very great product, i've started workout for a year. it is very hard for me to get sweat during workout. after i try this product, i can feel extra sweat come out from my body. while the cardio time, it goes like crazy, i can feel the sweat dripping. one thing i don't like about is this product make you feel hot, even after 8hrs from workout.

 
What a Rush!
By tim.croweVerified Purchaser from Knoxville, TN on 8/5/2011
Pros:
Effective, Really packs a punch
Cons:
Large pills
Best Uses:
Before workout
Describe Yourself:
Budget Buyer
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Have taken before running and working out. Really gives you a burst of energy for either type of workout. Strong flavor if you hold in your mouth too long, but not a nasty taste.

 
Hard to Say
By jordanbonetVerified Purchaser from New York, NY on 8/5/2011
Pros:
Easy To Use, Energy Boost
Cons:
Leaves you Hungry, Too Many Pills
Best Uses:
Daily Use, Men
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
30 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

I take two pills before a workout instead of three because I workout at night and don't need the caffeine keeping me up or jittery. I will say the product with out a doubt provides energy to get the job done, part of it may be placebo effect though. As for burning 12 times more calories, I can't say for sure because I have seen no weight change and there is no way to gauge this otherwise.

 
Feel Power during workout
By sheralijiwaniVerified Purchaser from Milpitas, CA on 8/5/2011
Pros:
Easy To Use, Effective, Lightweight
Best Uses:
Daily Use, Men
Describe Yourself:
Brand Buyer
My Beauty Routine Takes:
1+ Hour
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Every morning before workout

 
Awsome product for energy!!!
By kellusklineVerified Purchaser from millersburg' Oh on 7/26/2011
Pros:
Easy To Use, Effective
Best Uses:
Daily Use, On-the-go
Describe Yourself:
Budget Buyer
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

I just started taking this product, but I'll certainly be back for more!!! The energy boost is quite noticeable.

 
Great product - Great effectiveness
By rjspangVerified Purchaser from Richland, WA on 7/15/2011
Pros:
Effective, Excellent product, Good Value, Quick results
Cons:
None
Best Uses:
Before workout, Daily Use, Men, On-the-go
Describe Yourself:
Brand Buyer
My Beauty Routine Takes:
10 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

This is a great product before workouts and on my day off. This THERMO BURST Hardcore is a tremendous value.

 
Great Product
By poonmaster520Verified Purchaser from Houston, Tx on 7/15/2011
Pros:
Easy To Use, Good Value
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Pretty good product. Haven't used it enough to really tell a difference. It does give me energy before workouts, but I get some nausea sometimes.

 
It makes me work very hard in the gym. I
By marilisa_69_5Verified Purchaser from Branson Mo on 7/14/2011
Pros:
Easy To Use, Effective, Good Value, Lightweight
Best Uses:
Daily Use
Describe Yourself:
Brand Buyer
My Beauty Routine Takes:
1+ Hour
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

I use it when I go to the gym an hour before I work out and really works great, I love it!

 
I didn't see any benefit at all.
By aajad77Verified Purchaser from Mesa, AZ on 7/14/2011
Cons:
Not Effective
Describe Yourself:
Brand Buyer
Bottom Line:
No, I would not recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Since most new fat burners lack the stimulants that actually help burn fat, this really doesn't help.

 
GREAT PRODUCT
By KKRINER79Verified Purchaser from DAVENPORT,IOWA on 7/14/2011
Pros:
Easy To Use, Effective
Cons:
Poor Texture
Best Uses:
Daily Use
Describe Yourself:
Brand Buyer
My Beauty Routine Takes:
30 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

GREAT PRODUCT EASY TO USE

[1 of 1 customers found this review helpful]

 
Good energy for the price
By scotth99Verified Purchaser from VT on 6/17/2011
Pros:
Easy To Use, Effective, Good Value
Best Uses:
Daily Use
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Good product and low price. For people looking solely for fat loss I can;t speak to that too much, but this product will give you very good energy. I take this first thing in the morning on an empty stomach before I go running or hiking and it gives me a lot of energy and doesn't upset my stomach at all. I take a different supplament before using weights so i'm not sure how good this is for that.

[1 of 1 customers found this review helpful]

 
Great product for price!
By mrs.tiffanycolbert from Salt Lake City, UT on 4/3/2011
Pros:
Effective, Good Value
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
30 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

I have used this product off and on for years when I want a little help losing those "last five pounds." It works as well if not better for me as the expensive brands. I find as a woman I can take just two and have it work for me.
Reading some of the reviews, yea if you are not eating right using this product, and any that helps you burn more calories it can make you tired

 
2 years of using this product
By dennis.neilVerified Purchaser from Springfield, MO on 3/27/2011
Pros:
Easy To Use, Effective, Good Value
Best Uses:
Daily Use, On-the-go
Describe Yourself:
Brand Buyer
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Good pre-exercise and no side effects(stomach upset or jitters). Mild form of metabolic stimulation.

 
This is Great!!!
By natedoggy12Verified Purchaser from Springfield, MO on 3/11/2011
Pros:
Easy To Use, Effective, Good Smell, Good Value, Lightweight
Cons:
Poor Texture
Best Uses:
Daily Use
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
10 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

This product is great.

 
Careful with this.
By hybridclassic626 from Los Angeles on 3/1/2011
Pros:
Easy To Use, Good Value, Lightweight
Cons:
Bad reaction to alcohol, Burning feeling in stomac, Not Effective
Best Uses:
Men
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
1+ Hour
Bottom Line:
No, I would not recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

I used it prior to workouts. Sometimes waaay prior to workouts. Wasn't really that much effective in workouts.

Often left a burning feeling in my stomach (yes I ate) or I was jittery. I lowered it to two pills. But if that stuff is anywhere in your system for the day or whatever and you're a moderate drinker. It's going to comeback up. I stopped taking it and I'm back to drinking the same amount or more. Also my workouts are the same or better.

 
hmmmm..
By drewboo_adm9Verified Purchaser from Gainesville, FL on 2/18/2011
Pros:
Easy To Use, Good Value, Lightweight
Cons:
Not Effective, Takes away energy
Best Uses:
Daily Use
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
1+ Hour
Bottom Line:
No, I would not recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

so i bought this product thinking it would give me energy, but it really saps it. Maybe its just me. I think i cant feel the 400 mg of caffeine energy that im supposed to get. I think its because of the fact that it burns 12 times more calories. I used this 3 days in a row and felt so tired at the gym. i stopped for 3 or 4 days and had no problems of feeling tired. I then tried it again, and I felt like i had no energy. i dnt think the 400 mg of caffeine is a good mix with the 12 times calorie burner. As i said, maybe its just me.

 
Good Stuff
By grahambknowles from Nassau, Bahamas on 2/18/2011
Pros:
Easy To Use, Effective
Best Uses:
Daily Use
Describe Yourself:
Budget Buyer
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

This stuff is good for energy boost. And a great value especially when they have the deal for [$] going on. Thermo has the exact same igredients as Muscle Igniter 4X and if you buy when the special is on you save $30.

[2 of 2 customers found this review helpful]

 
GNC THERMOBURST HARDCORE
By mikezzi from Long Island ,NY on 12/25/2010
Pros:
Easy To Use, Effective, Good Value
Best Uses:
Daily Use, Men, On-the-go, Weekly Use, Women
Describe Yourself:
Brand Buyer
My Beauty Routine Takes:
10 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Thermoburst Hardcore is a great product!It motivates me to exercise or just start the day off great. Thermoburst gives a nice energy boost without weird effects like most burner type products out there. The taste has been improved over the original thermoburst . GNC came up with an Excellent product without a rip off price!

[3 of 3 customers found this review helpful]

 
get a bang for your buck.
By clubamericalara from OKC, OK on 12/17/2010
Pros:
Easy To Use, Effective, Good Value
Cons:
Bad smell, To much caffeine
Best Uses:
Daily Use
Describe Yourself:
Brand Buyer
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

I bought this product to check gnc's thermogenic as i alwasy use nutrex, bsn or muscle asylum fat burners/thermogenics. At first i noticed the high amount of caffeine but continued to take it anyway. I had cycled off of all fat burners for a week and this kicked in immediately as I took a pack m-stak as well and had the BEST workout in months. The only problem is i took 3 and could not fall asleep at all that same night. Take 1-2 until you assess your own tolerance.

[1 of 1 customers found this review helpful]

 
Great burner!
By t2beastmodeVerified Purchaser from charlotte, nc on 12/8/2010
Pros:
Easy To Use, Effective, Good Value
Best Uses:
Pre-workout
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
30 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Do not take wih caffeine. It will increase your heart rate and make you jittery.

[1 of 3 customers found this review helpful]

 
JUnk product; older one is WAY BETTER
By caseyrosario123 from Hilo, HI on 12/6/2010
Pros:
Good Smell
Cons:
Not Effective, Poor Texture

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

[...] the old one makes me feel better when I lift.

[3 of 3 customers found this review helpful]

 
Based on two days...thumbs up!
By gogreenchariot from North Carolina on 12/2/2010
Pros:
Easy To Use, Effective, Feel Energy Within 30 Min, Good Smell, Good Value, Sustained Energy
Cons:
Full dose keeps you awake
Best Uses:
Daily Use
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
30 Minutes
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

I am usually exhausted after a full day sitting in front of a computer. I want to workout, but lack the energy. I take 2 (not 3) of the Thermo Burst and within 15 minutes I want to be out the door and am excited for the gym. I get a full workout in without a relapse into exhaustion, and I stop when I feel like it (generally after an hour). I recommend starting with 1 or 2 pills because I took the full dose on my first day and stayed up all night.

[2 of 8 customers found this review helpful]

 
Good pre-workout
By pdavies27Verified Purchaser from Red Bluff, CA on 10/8/2010
Pros:
Easy To Use, Effective, Good Smell
Cons:
Pricey poor value
Best Uses:
Daily Use
Describe Yourself:
Budget Buyer
My Beauty Routine Takes:
1+ Hour
Bottom Line:
Yes, I would recommend this to a friend

Comments about GNC PRO PERFORMANCE GNC Pro Performance® Thermo Burst™ Hardcore:

Before my workout

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