Dietary Supplement
Clinically Researched
- Powered with 400 mg of caffeine and micronized L-Carnitine for explosive energy*
- Clinically proven thermogenic blend improves endurance and athletic performance*
- Helps you burn 12 times more calories after your workout*
New and improved! Now more powerful than ever, GNC Pro Performance® 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 blends shown to improve finish time by nearly five minutes and help push your endurance performance to higher levels.*+
Each serving combines 400 mg of caffeine with technology-enhanced red and black pepper extracts and other superior components proven to provide calorie-burning effects. In fact, it's been clinically shown to burn 12 times more calories and increase metabolism before, during, and after exercise.*+
Study participants taking the blends in Thermo Burst™ Hardcore reported that they felt less tired while working out.+* In addition to ingredients that promote a thermogenic response and support your goal of improved physical activity, Thermo Burst™ Hardcore also supplies micronized L-Carnitine to help convert fatty acids into energy.*
+A study of 29 physically fit and healthy young adult male subjects averaging about 4 hours of exercise a week showed that individuals on the thermogenic blend found in Thermoburst Hardcore were able to increase performance measured by time to exhaustion while cycling at 80% VO2max by nearly 5 minutes longer than when taking placebo.
^In a double blind, randomized, placebo controlled cross-over study, 25 subjects exercised on a treadmill on two occasions. On one occasion, the subjects took the herbal blend in GNC Pro Performance® Thermo Burst™ Hardcore 60 minutes before exercise and on the second occasion, they took a placebo. When the subjects took the herbal blend in GNC Pro Performance® Thermo Burst™ Hardcore, they burned three times more calories before, 3% more calories during and 12 times more calories for up to an hour after exercise compared to when they took the placebo. This resulted in an average cumulative total of 278 more calories burned before, during, and after exercise compared to placebo.
*These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. | 
