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Muscle Function Formula

GNC Pro Performance AMPUpdated April 2026

Product Information

Form
Capsule
Product Type
Amino acid/Protein
DSLD Entry Date
2015-05-22

Target Groups

Adult Male (18-50 Years)

All Ingredients

IngredientAmount% DV
Magnesium60 mg15%
Zinc30 mg200%
L-Leucine150 mg
L-Isoleucine50 mg
L-Valine50 mg

† Daily Value not established.

Label Statements

Precautions re: Pregnant or Nursing or Prescription Medications

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

Precautions re: All Other

Discontinue use two weeks prior to surgery.

Precautions re: Children

KEEP OUT OF REACH OF CHILDREN.

Storage

Store in a cool, dry place.

Suggested/Recommended/Usage/Directions

DIRECTIONS: As a dietary supplement, take the contents of one packet daily with food after your workout. Do not take prior to bed.

General Statements: All Other Content

Muscle Function Formula

General Statements: All Other Content

{Capsule} ACTUAL SIZE

General Statements: All Other Content

GNC QUALITY COMMITMENT For more than 75 years, GNC has been the leader in the development and manufacture of dietary supplements and is committed to producing the most superior products. We use only the highest quality ingredients manufactured under the strictest quality controls. Every raw material used is tested to ensure its purity and potency. Each product is dated and then shipped immediately to our stores to ensure that you are purchasing the freshest supplements available.

General Statements: All Other Content

GNC GUARANTEE If you are not 100% completely satisfied, return the unused portion of the product with your receipt to a GNC store within 30 days. Our trained sales staff will either refund your purchase price or, if you prefer, assist you in finding a replacement product to help you LIVE WELL.

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

What is Pro Performance(R) AMP Recovery Vitapak(R) Program?

General Statements: All Other Content

Athletes today push their bodies to extremes to achieve maximum results in athleticism, speed, muscle performance and physical potential. Their ability to exhaust their bodies with powerful physical training regimens goes further than just how they perform any given workout. An overlooked key to their physical prowess is the ability to recover from the intense strain on their bodies and capacity to rebuild muscles that have been put through a rigorous thrashing.

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

GNC Scientists have created the breakthrough Pro Performance(R) AMP Recovery Vitapak(R) Program. This incomparable, dominant program combines daily premium sports nutrients and clinically studied ingredients to rebuild muscle and fuel an athlete's recovery.

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

What is Pro Performance(R) AMP Recovery Vitapak(R) Program? With the breakthrough Pro Performance(R) AMP Recovery Vitapak(R) Program athletes can power through training fearless of repercussions and after-effects. This elite, advanced program provides your body with highly absorbable, clinically studied ingredients for recovery plus potent herbal ingredients proven to provide fast joint comfort and flexibility.

General Statements: All Other Content

Muscle Function Formula - Combining BCAA and Zinc Magnesium Aspartate gives athletes a unique element that will replenish key amino acids and minerals. BCAA are essential amino acids that are part of muscle protein that help to preserve muscle glycogen stores and help to reduce the amount of protein breakdown. Exercise may result in a loss of essential vitamins and minerals.

General Statements: All Other Content

In a 12 week multi-center randomized, double-blind, placebo-controlled study of 60 adults, subjects taking 250 mg/day of the two active components found in Joint Comfort Formula showed a significant 30% improvement in joint flexibility and a 19.4% improvement in joint function in 30 days compared to subjects on placebo.

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.

General Statements: All Other Content

ADVANCED MUSCLE PERFORMANCE

FDA Statement of Identity

Dietary supplement

General Statements: All Other Content

ADVANCED SPORTS VITAMIN SYSTEM TO FUEL MUSCLE RECOVERY AND REPAIR WITH OVER 50 POWERFUL INGREDIENTS

General Statements: All Other Content

- Features GNC's Highest-Potency Sports Multivitamin to Fuel a Ripped Physique

General Statements: All Other Content

- Provides anti-catabolic amino acids to support prevention of muscle breakdown

General Statements: All Other Content

- Clinically formulated to improve joint flexibility by 30% and support the body's natural anti-inflammatory response

General Statements: All Other Content

- Replenish and refuel fatigued muscles with potent nutrients to optimize recuperation

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Daily Recovery Energy Endurance

General Statements: All Other Content

Clinically Researched

General: Product/Version Code

CODE 330011 HNG

Suggested/Recommended/Usage/Directions

For maximum performance and physique support, stack with: -Amplified Recovery Protein XR(TM) for post-workout muscle support. - Amplified Creatine 189(TM) to fuel muscles and promote cell hydration.

General Statements: All Other Content

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Supplement Facts Panel

Supplement Facts
Serving Size 2 Capsule(s)
Amount Per Serving% Daily Value*
Magnesium
60 mg15%
Zinc
30 mg200%
L-Leucine
150 mg
L-Isoleucine
50 mg
L-Valine
50 mg

* Percent Daily Values are based on a 2,000 calorie diet.

† Daily Value not established.

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