🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 42% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

2 Orange Caplet(s) Serving Size
30 Servings
Other Combinations Product Type
42% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
120 mg (133% DV)
20 mg (125% DV)
✅ 1.4× RDA — within safe limits 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 20mg UL 35mg
2 mg (118% DV)
✅ 1.5× RDA — within safe limits 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 2mg UL 100mg
10 mg (200% DV)
✅ 2.0× RDA — within safe limits 📚 1 studies — no high-quality reviews
RDA 5mg This product: 10mg
📊 Market median: 250.0mg (337 products) 📚 125 studies (Tier A: 1, B: 41)
This product: 500mg
Yerba Mate leaf extract
500 mg
📊 Market median: 495.0mg (70 products)
Median 495.0mg This product: 422mg
Black Tea Leaf Extract
100 mg
📊 Market median: 650.0mg (87 products) 📚 1 studies — no high-quality reviews
This product: 100mg
25 mg
📊 Market median: 500.0mg (861 products) 📚 60 studies (Tier A: 4, B: 13)
This product: 25mg
Dill Flower, Leaf, Stem Extract
5 mg
📊 Market median: 100.0mg (284 products) 📚 10 studies (Tier A: 0, B: 4)
This product: 1mg

Other Ingredients

Microcrystalline Cellulose Crospovidone Hydroxypropyl Cellulose Dicalcium Phosphate Croscarmellose Sodium Maltodextrin Hydroxypropyl Methylcellulose Stearic Acid Silicon Dioxide Polydextrose Titanium Dioxide Riboflavin Magnesium Stearate Sugar Talc Medium Chain Triglyceride Vegetable Acetoglycerides Carnauba Wax Polyethylene Glycol natural Vanilla Mint flavor Gum Arabic Polysorbate 80 Sucralose Carmine Tricalcium Phosphate Sodium Starch Glycolate

Label Claims — Verification

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

Target Groups

Adult Male (18-50 Years) Gluten Free

Product Information

📋 Directions for Use

Directions: As a dietary supplement, take the contents of one pack daily with food.

⚠️ Warnings & Precautions

Warning: cancer & reproductive harm - www.P65Warnings.ca.gov. Discontinue use two weeks prior to surgery. Niacin may cause a temporary flushing reaction. Total caffeine = 202 mg per serving.

Consult your physician prior to using this product if you are pregnant, nursing, taking medication or have a medical condition.

Contains a bioengineered food ingredient. Contains: soy.

Keep out of reach of children

🧪 Formulation Notes

5 products in 1 pack GNC AMP Men's extreme training vitapak program delivers the power of five science-based formulas to help you maximize your physical and mental intensity and get the most from your workout. Train harder Clinically studied formula improves performance & increases endurance

Advanced muscle performance Vitapak program with performance + endurance support Improves performance & increases endurance A double-blind, placebo-controlled, crossover study of 29 physically fit and healthy young adult male subjects averaging about 4 hours of exercise a week cycling to exhaustion at 80% V02 shows that these individuals were able to increase performance measured by time to exhaustion nearly 5 minutes longer than when taking placebo.

No artificial flavors, gluten free. Gluten free

Our quality commitment to you Since 1935, our mission as the industry leader has been to provide you with the highest-quality nutritional supplements. We continue to stand behind this mission. If you're not 100% satisfied with your purchase, return the unused portion of the product with your receipt within 30 days and we'll either refund your money or find a replacement product that is right for you.

Additional Information

If it's on our packages, then it's in our boxes. Clinically studied ingredients backed by real science. Get vitamins. Train Harder. Get extreme.

30-day supply

Store in a cool, dry place.

For more information: 1-888-462-2548 GNC.com

Product Details

DSLD Entry Date 2024-07-25
Product Type Other Combinations
Form Other (e.g. tea bag)
Bundle Men's Extreme Training
DSLD ID 312701
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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