🟢 96/100

This product looks safe

  • Niacin: 40mg is 1.1× the Tolerable Upper Intake Level (35mg)
  • 22% of ingredients have research evidence
C Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Niacin: 40mg is 1.1× the Tolerable Upper Intake Level (35mg)

Label Data

6 Gram(s) Serving Size
40 Servings
Other Combinations Product Type
22% Evidence Coverage

Supplement Facts — Evidence Check

Calories
20 {Calories}
Total Carbohydrates
5 g (2% DV)
Vitamin C
120 mg (200% DV)
40 mg (200% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 1.1× (UL: 35 mg) 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 40mg UL 35mg
2 mg (100% DV)
✅ 1.5× RDA — within safe limits 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 2mg UL 100mg
10 mg (100% DV)
✅ 2.0× RDA — within safe limits 📚 1 studies — no high-quality reviews
RDA 5mg This product: 10mg
Performance Blend
1.69 g
Sports Antioxidant Blend
105 mg
Calorie Burn Blend
368.34 mg

Other Ingredients

Citric Acid Malic Acid Natural and Artificial flavors Acesulfame Potassium Sucralose Red #40

Label Claims — Verification

All Other
Structure/Function
All Other (99% of products) Structure/Function (83% of products) Nutrient (54% of products)

Target Groups

Adult (18 - 50 Years) Sugar Free

Product Information

📋 Directions for Use

DIRECTIONS: As a dietary supplement, mix 1 scoop (6 g) with 16 fl oz of cold water and shake vigorously once daily. Take 30 to 60 minutes pre-workout. On non-training days, the product should be taken first thing in the morning.

⚠️ Warnings & Precautions

WARNING: Use only as directed. Do not exceed one scoop daily. Do not use if pregnant, nursing or allergic or contraindicated to aspirin. If you are taking aspirin or blood thinning or other medication or have a medical condition, consult your healthcare professional before using this product. Discontinue use two weeks prior to surgery, or if upset stomach occurs.

KEEP OUT OF REACH OF CHILDREN.

🧪 Formulation Notes

Zero sugar

Total caffeine per serving is 400 mg.

Additional Information

PHASE 3: Improved Cardio Endurance Amplified Muscle Igniter 4X now includes Beta-Alanine, a critical fatigue-controlling factor. Plus, the Performance Blend has been clinically tested and shown to increase cardio endurance performance by nearly 5 minutes.^* ^A study of 29 physically fit and healthy young adult male subjects averaging about 4 hours of exercise a week cycling to exhaustion at 80% VO2 shows that these individuals were able to increase performance measured by time to exhaustion nearly 5 minutes longer than when taking placebo. PHASE 4: Post-Workout Protection Combat workout induced oxidative stress and battle muscle damaging free radicals! The Sports Antioxidant Blend provides resVida(R) trans-Resveratrol, a clinically studied blood vessel dilator*, to help increase blood flow necessary to allow more nutrients to get into the muscles. This explosive formula also features powerful antioxidant, Quercetin, to help support recovery after intense workouts.

{arrow} Powers Muscles With Key Components To Enhance Blood Flow* {arrow} Ignites Intensity, Metabolism & More Calorie Burn While Protecting Muscle Cells*

{circle} Daily {circle} Pre-Workout {circle running} Endurance {circle flame} Energy {beaker} Clinically Researched

Licensed under one or more of U.S. Pat. Nos. 5,965,596, 6,426,361, 7,504,376 and 8,067,381, each of which is owned by Natural Alternatives International, Inc. (NAI).

E5192401

ADVANCED MUSCLE PERFORMANCE 4-phase workout enhancer powder

MORE POWERFUL ENDURANCE & PERFORMANCE AMPLIFIER*

Natural + artificial flavor

CODE 791259 KMG

NOTICE: Significant product settling may occur.

Store in a cool, dry place.

The 4-Phase System for Undeniable Results! PHASE 1: Pre-Workout Calorie Burn Amplified Muscle Igniter 4X now features a more advanced, powerful cocktail of performance ingredients. Burn 300% more calories pre-workout and ignite your metabolism for hardcore results!* In a study, a group of 25 participants exercised on the treadmill on two occasions. On one occasion, they used the Calorie Burn Blend in this formula 60 minutes before exercise and on the second occasion, they took a placebo. Results showed a 300% increase in calorie burn before exercise for those who took the Calorie Burn Blend compared to the placebo. PHASE 2: More Physical & Mental Intensity Getting into the zone mentally is crucial for high-quality training. Now you can push every single workout to the limits with increased intensity, better muscular performance and improved reaction time - allowing you to take your results to a new level.* The ingredients in the Performance Blend are clinically tested and deliver the proper compounds necessary to maximize each benefit. Work out harder and longer while pushing your body to the max with this powerful formula.*

Product Details

UPC / SKU 0 48107 11052 9
DSLD Entry Date 2013-02-25
Product Type Other Combinations
Form Powder
DSLD ID 18540
Data Updated 2026-04-11

Research Evidence

371 Research Sources
54 Avg Quality Score
148 Meta Analysis
82 Systematic Review
71 Rct
62 Clinical Trial
2 Regulatory Source
1 Cochrane Review
1 Narrative Review
1 Other
1 Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
View all evidence for Vitamin C →

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