Energy Enhancer N.O.®

Other Combinations

Brand: GNC Pro Performance AMP

Tablet or PillOther CombinationsOn Market
Click to view full label

Net Contents

N/A

Serving Size

3 Tablet(s)

Servings Per Container

Not specified

Supplement Form

Tablet or Pill

Bar Code (UPC/SKU)

Not specified

Product Version

CODE 331311 CMG

Label Analysis

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

4Active Ingredients

4 distinct active ingredients are disclosed in Supplement Facts.

100%Amount Transparency

Every active ingredient discloses a specific amount per serving.

1% Daily Value Coverage

1 ingredients report an established %DV per serving.

1Dietary Attributes

Label states: Gluten-Free.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen Guide

Free From

  • Milk
  • Wheat
  • Gluten

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Supplement Facts

Serving Size: 3 Tablet(s) · 1 per day

IngredientAmount Per Serving% Daily Value
Niacin10 mg50%
L-Arginine, Micronized1500 mg
MegaNatural(R)-BP(TM) Grape Seed Extract300 mg
PEG150 mg

Not Present

Other Ingredients

Calcium CarbonateEnteric CoatingTitanium DioxideVegetable AcetoglyceridesSodium Copper ChlorophyllinsSodium Copper Chlorophyllin

Target Groups

Adult Male (18-50 Years)Gluten Free

Label Claims

NutrientAll OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

DIRECTIONS: As a dietary supplement, take the contents of one pak 30-60 minutes pre-workout. On non-training days, take the contents of one pak first thing in the morning with food. Do not exceed one pak daily.

Warnings & Precautions

Precautions re: Pregnant or Nursing or Prescription Medications

Consult your physician prior to using this product if you are pregnant, nursing, taking medication, allergic or contraindicated to aspirin, or have a medical condition. Discontinue use two weeks prior to surgery, or if upset stomach occurs.

Precautions re: Pregnant or Nursing or Prescription Medications

Consult your physician prior to using this product if you are pregnant, nursing, taking medication, allergic or contraindicated to aspirin, or have a medical condition. Discontinue use two weeks prior to surgery, or if upset stomach occurs.

Precautions re: Children

KEEP OUT OF REACH OF CHILDREN.

Storage

Storage

Store in a cool, dry place.

Formulation

Formulation re: Does NOT Contain

No Wheat, No Gluten, No Dairy, Yeast Free.

FDA Statements

FDA Disclaimer Statement

* 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.

FDA Statement of Identity

Dietary supplement

Other Label Statements

General Statements: All Other Content

In a randomized, double blind, placebo controlled study, 50 healthy untrained male volunteers were given Energy Enhancer N.O. or a placebo. Each subject exercised on a cycle ergometer prior to receiving the supplement or placebo and again after the treatment period was finished. Those subjects supplemented with Energy Enhancer N.O. had a 20% increase in PWCFT (physical working capacity at the fatigue threshold) after four weeks of supplementation relative to the placebo group.

General Statements: All Other Content

ACTUAL SIZE

General Statements: All Other Content

Energy Enhancer N.O.

General Statements: All Other Content

Energy Enhancer N.O. – This advanced nitric oxide product provides 1.5g of micronized arginine and is included to help increase your power output at the onset of fatigue 20%.† It’s clinically studied and designed to enhance blood flow and amplify your intense workouts.* Technologically enhanced for better absorption to maximize muscle performance capacity and give your body the push it needs to go above and beyond your regular workouts.

Brand IP Statement(s) re: (c), (TM), (SM)

MegaNatural(R)-BP(TM) and its logo are trademarks of Constellation Wines U.S., Inc.

Seals/Symbols

MegaNatural(R)-BP

General Statements: All Other Content

GNC QUALITY COMMITMENT GNC, the leader in the development and manufacture of dietary supplements, is committed to producing the highest quality products available. This commitment begins with quality designed supplement formulations. Every raw material that goes into a GNC supplement is guaranteed as to quality and potency. Each product is dated and then shipped immediately to our stores, so you can be sure you are purchasing the freshest supplements available. At GNC, we extend our quality commitment to you by offering our money-back guarantee.

General Statements: All Other Content

To maximize total endurance and energy support, use with: • Amplified Endurance Booster – loaded with electrolytes, carbohydrates and BCAA to replenish glycogen stores fast* • Amplified 100% Whey Protein – with fast-absorbing protein to fuel your training*

Brand IP Statement(s) re: (c), (TM), (SM)

The Pro Performance(R) AMP Endurance Vitapak(R) Program Evolution Driving this elite performance breakthrough is a mechanism that supports enhanced blood flow and oxygen uptake at the most critical time during training – at the onset of fatigue. Using an unmatched clinically proven module, it unleashes a 20% boost in workout intensity.† Most athletes today are not combining the proper combinations and ratios of critical sports nutrition. This system, used by elite runners, cyclists and other hardcore athletes, delivers precisely what muscles need to fuel difficult training, help your body recover and prepare to do it again. This exclusive nutrient system amplifies total muscle performance, increases intensity at the onset of fatigue, fuels cardio training, improves performance and ramps up energy production.* Mega Men(R) Sport – This high-potency clinically studied^ sports multivitamin formula includes critical components to fill important nutrient gaps in regular supplementation programs. Mega Men(R) Sport contains B-vitamins that are important for energy production and carbohydrate metabolism.* It provides amino acids, including BCAA, and a joint cushioning blend for healthy joint cartilage.* Also features a broad spectrum of cell-protecting antioxidants and nutrients that aid in boosting immunity.*

General Statements: All Other Content

Clinically Researched^

Brand IP Statement(s) re: (c), (TM), (SM)

What is Pro Performance(R) AMP Endurance Vitapak(R) Program? The power to endure intense physical training and extreme cardiovascular sessions requires absolute fine-tuning of your sports nutrition regimen to enable the body to perform at peak levels. The most perfectly trained athletes know that you must have an effective, targeted and balanced nutrition regimen to achieve maximum training benefits. GNC Scientists have created the breakthrough Pro Performance(R) AMP Endurance Vitapak(R) Program. The unparalleled power of over 50 premium, athletic-boosting ingredients combine together to amplify physical and mental intensity, delivering a total performance boost of 20%. This powerful combination of a daily premium multivitamin, sports nutrients and clinically studied ingredients delivers the edge athletes want to perform.

General Statements: All Other Content

ADVANCED MUSCLE PERFORMANCE

General Statements: All Other Content

ADVANCED SPORTS VITAMIN SYSTEM TO AMPLIFY ENDURANCE WITH OVER 50 POWERFUL INGREDIENTS*

General: Product/Version Code

CODE 331311 CMG

General Statements: All Other Content

Daily Endurance Energy Stamina

General Statements: All Other Content

Each pak contains:

General Statements: All Other Content

GNC GUARANTEE Use any GNC supplement for as little as 10 days. If you are not 100% completely satisfied, return the unused portion of the product with proof of purchase to your GNC store for a complete refund of your purchase price. No questions asked!

Manufacturer & Distributor

Other

1-888-462-2548

Distributor

General Nutrition Corporation

Pittsburgh, PA, 15222

Distributor

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Where to Buy Locally

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

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  • Supplement Hub

    4.0 (6)

    Vitamin & Supplements Shop

    The Old Chapel, 8 Mortimer St, Sheffield City Centre, Sheffield S1 4SF

Research & Studies

  • … phytonutrient-enriched electrolyte formulation, in enhancing neuro-muscular synergy, immune competence, cellular aerobic glycolysis and sports performance

    B William Downs, SP Banik, BS Morrison… - BIO web of …, 2025 - bio-conferences.org

    … , a traditionally used ergogenic supplement in sports nutrition … health and sports performance [1, 2]. Generally, an athlete’s … electrolytes, micronutrients and NO booster without the …

    2025
  • Contaminación y efectos secundarios en suplementos deportivos (proteínas, aminoácidos, creatina y suplementos para la pérdida de peso).

    M Muñoz López - 2014 - oa.upm.es

    … Una etapa no sólo mía, si no una etapa común que empezó hace más de 25 años cuando Mario y Mari Jose decidieron ser padres. Durante este cuarto de siglo han ocurrido muchas …

    20142 citations
  • The dark side of energy drinks: a comprehensive review of their impact on the human body. Nutrients. 2023; 15: 3922

    A Costantino, A Maiese, J Lazzari, C Casula… - 2023 - academia.edu

    … or chronic abuse of energy drinks on human health. The … These products are marketed as enhancers of mental acuity … literature of people with no known medical conditions who have …

    20238 citations
  • The impact of engineered silver nanomaterials on the immune system

    N Ninan, N Goswami, K Vasilev - Nanomaterials, 2020 - mdpi.com

    … have been incorporated in a number of other commercial products which may or may not … such products raises important questions about a possible adverse influence on human health. …

    202090 citations
  • Enlarging the Regulation of Shrinking Cosmetics and Sunscreens

    RF Wilson - 2011 - papers.ssrn.com

    … effects on human and environmental health."7 Indeed, “[t]lie … on damaged skin’ and exploit penetration enhancers "18 - - … nanoparticles in their products without much interference from …

    20112 citations
  • Functional foods: formulation, fortification, and combating COVID-19

    M Nag, F Siddiqua, N Baruah, S Das… - The Functional …, 2024 - taylorfrancis.com

    … In order to age without much health complication, proper nutrition is a must, without which … due to intake of wrong food products, which can worsen the health condition. Therefore, it is …

    20244 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2012-02-23. DSLD Label ID: 5819. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.