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Peak Performance Stack

New

Peak Performance Stack

Availability: In Stock
$147.75
296 AmPerks Points
This product contains ingredients or claims requiring an adult (18+) signature and proof of age upon delivery. See FAQs for details.

What's included:

TRAIN, EXPERIENCE, REPEAT! - Push the limit and experience fit with the Peak Performance Stack. Start your day with extended-release B vitamins and achieve more with XS™ Pre-Workout Boost supplement to power through your training. Then recover faster and get results with science-based ingredients in XS Post-Workout Recovery supplement and clinically-tested Muscle Multiplier*† supplement. Support your energy needs before, during and after for ultimate performance.

*When combined with a reduced-calorie diet and moderate physical activity. Anyone with a medical condition, including diabetes and hypoglycemia, should consult a physician before using this product.

†This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

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No days off

The key to peak performance is having the ability to train progressively and consistently! Optimize your energy and reach new peaks with the help of XS sports nutrition products to maximize your training and key nutrients to help support recovery after workouts. This stack also features Nutrilite Vitamin B Dual Action to get your day started right with instant and time released B vitamins for all day energy support.†
 

With your body primed, XS Pre-Workout Boost supplement helps increase focus and performance during your training.† XS Muscle Multiplier*† supports increased strength when combined with regular weight/resistance training and a healthy, balanced diet; while XS Post-Workout Recovery supplement helps support recovery after workouts to get you back on the grind.†

Man pulling a stick pack of XS Pre-Workout Boost supplement for the box

Power your workouts

Outperform your best with balanced energy from 115mg of natural caffeine, 100mg of Rhodiola Rosea, along with 4g of CarnoSyn Beta Alanine, 3.4g of L-Citrulline, and a mega dose of B-vitamins to help support more vigorous workouts.†
XS™ Muscle Multiplier*† Essential Amino Acid supplement in a grassy field

Fuel Lean Muscle

Amino acids are the building blocks of protein and muscle tissue. XS Muscle Multiplier*† is clinically shown to boost muscle growth, minimize muscle tissue breakdown and improve body composition.*†
XS™ Post-Workout Recovery supplement on a post outside

Recover faster

Rebound faster from intense workouts and support your muscle and joint health with a clinical dose of Glutamine and Glucosamine HLC, plus Turmeric, so you’re ready for your next challenge!†
Nutrilite Vitamin B Dual Action bottle and two tablets on a windowsill

Fight fatigue

Win the fight against occasional fatigue with Nutrilite™ Vitamin B Dual Action.† This bi-layer tablet releases 8 essential B vitamins – 2 instantly and 6 more slowly for 8 hours of energy support.†
Man pulling a stick pack of XS Pre-Workout Boost supplement for the box

Power your workouts

Outperform your best with balanced energy from 115mg of natural caffeine, 100mg of Rhodiola Rosea, along with 4g of CarnoSyn Beta Alanine, 3.4g of L-Citrulline, and a mega dose of B-vitamins to help support more vigorous workouts.†
XS™ Muscle Multiplier*† Essential Amino Acid supplement in a grassy field

Fuel Lean Muscle

Amino acids are the building blocks of protein and muscle tissue. XS Muscle Multiplier*† is clinically shown to boost muscle growth, minimize muscle tissue breakdown and improve body composition.*†
XS™ Post-Workout Recovery supplement on a post outside

Recover faster

Rebound faster from intense workouts and support your muscle and joint health with a clinical dose of Glutamine and Glucosamine HLC, plus Turmeric, so you’re ready for your next challenge!†
Nutrilite Vitamin B Dual Action bottle and two tablets on a windowsill

Fight fatigue

Win the fight against occasional fatigue with Nutrilite™ Vitamin B Dual Action.† This bi-layer tablet releases 8 essential B vitamins – 2 instantly and 6 more slowly for 8 hours of energy support.†
Man pulling a stick pack of XS Pre-Workout Boost supplement for the box

Power your workouts

Outperform your best with balanced energy from 115mg of natural caffeine, 100mg of Rhodiola Rosea, along with 4g of CarnoSyn Beta Alanine, 3.4g of L-Citrulline, and a mega dose of B-vitamins to help support more vigorous workouts.†
XS™ Muscle Multiplier*† Essential Amino Acid supplement in a grassy field

Fuel Lean Muscle

Amino acids are the building blocks of protein and muscle tissue. XS Muscle Multiplier*† is clinically shown to boost muscle growth, minimize muscle tissue breakdown and improve body composition.*†
XS™ Post-Workout Recovery supplement on a post outside

Recover faster

Rebound faster from intense workouts and support your muscle and joint health with a clinical dose of Glutamine and Glucosamine HLC, plus Turmeric, so you’re ready for your next challenge!†
Nutrilite Vitamin B Dual Action bottle and two tablets on a windowsill

Fight fatigue

Win the fight against occasional fatigue with Nutrilite™ Vitamin B Dual Action.† This bi-layer tablet releases 8 essential B vitamins – 2 instantly and 6 more slowly for 8 hours of energy support.†

*When combined with regular weight/resistance training and a healthy, balanced diet.
†This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Key nutrients for next-level performance

Amino Acids

The building blocks of life! Amino acids are tiny organic compounds that team up to form proteins, critical for muscle growth, maintenance, and repair. Without an adequate supply of amino acids, your body will use existing muscle tissue as fuel to support daily activities and workouts which results in muscle breakdown and the loss of muscle mass. Essential Amino Acids are only obtained through food and supplementation while non-essential amino acids are produced naturally by the body.

Rhodiola Rosea & Caffeine

Rhodiola rosea is an adaptogenic herb that has been used for hundreds of years to increase both physical and mental stamina. When combined with the natural caffeine found in green tea, it helps maximize both physical endurance and mental focus during exercise. ​​​​​​​
Rhodiola rosea plant and caffeine leaf

Carnosyn Beta Alanine and L-Citrulline

Beta Alanine is another ingredient with benefits tied to improved athletic performance by releasing carnosine into working muscle to buffer the onset of lactic acid build up during high intensity exercise. Carnosyn Beta Alanine and L-Citrulline work in tandem to support blood flow to your muscle cells. More blood flow to muscles means increased oxygen and nutrients to pump your workouts. All this can result in increased endurance, reduced fatigue, and a boost of performance during exercise.
Scoop of protein powder viewed from overhead

Spirulina

Spirulina contains phycocyanin - a phytonutrient that is part of spirulina’s light harvesting pigment complex - which acts as an antioxidant and contributes to energy-yielding metabolism.
Spirulina powder

Amino Acids

The building blocks of life! Amino acids are tiny organic compounds that team up to form proteins, critical for muscle growth, maintenance, and repair. Without an adequate supply of amino acids, your body will use existing muscle tissue as fuel to support daily activities and workouts which results in muscle breakdown and the loss of muscle mass. Essential Amino Acids are only obtained through food and supplementation while non-essential amino acids are produced naturally by the body.

Rhodiola Rosea & Caffeine

Rhodiola rosea is an adaptogenic herb that has been used for hundreds of years to increase both physical and mental stamina. When combined with the natural caffeine found in green tea, it helps maximize both physical endurance and mental focus during exercise. ​​​​​​​
Rhodiola rosea plant and caffeine leaf

Carnosyn Beta Alanine and L-Citrulline

Beta Alanine is another ingredient with benefits tied to improved athletic performance by releasing carnosine into working muscle to buffer the onset of lactic acid build up during high intensity exercise. Carnosyn Beta Alanine and L-Citrulline work in tandem to support blood flow to your muscle cells. More blood flow to muscles means increased oxygen and nutrients to pump your workouts. All this can result in increased endurance, reduced fatigue, and a boost of performance during exercise.
Scoop of protein powder viewed from overhead

Spirulina

Spirulina contains phycocyanin - a phytonutrient that is part of spirulina’s light harvesting pigment complex - which acts as an antioxidant and contributes to energy-yielding metabolism.
Spirulina powder

Amino Acids

The building blocks of life! Amino acids are tiny organic compounds that team up to form proteins, critical for muscle growth, maintenance, and repair. Without an adequate supply of amino acids, your body will use existing muscle tissue as fuel to support daily activities and workouts which results in muscle breakdown and the loss of muscle mass. Essential Amino Acids are only obtained through food and supplementation while non-essential amino acids are produced naturally by the body.

Rhodiola Rosea & Caffeine

Rhodiola rosea is an adaptogenic herb that has been used for hundreds of years to increase both physical and mental stamina. When combined with the natural caffeine found in green tea, it helps maximize both physical endurance and mental focus during exercise. ​​​​​​​
Rhodiola rosea plant and caffeine leaf

Carnosyn Beta Alanine and L-Citrulline

Beta Alanine is another ingredient with benefits tied to improved athletic performance by releasing carnosine into working muscle to buffer the onset of lactic acid build up during high intensity exercise. Carnosyn Beta Alanine and L-Citrulline work in tandem to support blood flow to your muscle cells. More blood flow to muscles means increased oxygen and nutrients to pump your workouts. All this can result in increased endurance, reduced fatigue, and a boost of performance during exercise.
Scoop of protein powder viewed from overhead

Spirulina

Spirulina contains phycocyanin - a phytonutrient that is part of spirulina’s light harvesting pigment complex - which acts as an antioxidant and contributes to energy-yielding metabolism.
Spirulina powder
XSPeakPerformanceSolution-spb-en-US-m-01.jpeg

New regimen essentials

Follow these steps to incorporate the Peak Performance Stack regimen into your healthy diet and workout routine, supercharge your training and push to new limits.

XS Pre-Workout Boost - mix one stick pack in 12-16 fl oz of water or juice and consume 15-30 minutes before starting your workout.

XS Muscle Multiplier*† Essential Amino Acid Supplement - mix one scoop with water immediately post workout. Muscle Multiplier*† can also be taken prior to and during your workout and on non-training days to support muscle growth and reduce muscle tissue breakdown.†

XS Post-Workout Recovery - mix one level scoop with 12-16 fl oz of water and consume within 30 minutes post-exercise to start recovering faster.†

Nutrilite Vitamin B Dual Action - take one tablet daily, preferably with a meal for 8 hours of B vitamins for energy support.†

†This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

*When combined with regular weight/resistance training and a healthy, balanced diet. 

XSPeakPerformanceSolution-spb-en-US-m-01.jpeg

New regimen essentials

Follow these steps to incorporate the Peak Performance Stack regimen into your healthy diet and workout routine, supercharge your training and push to new limits.

XS Pre-Workout Boost - mix one stick pack in 12-16 fl oz of water or juice and consume 15-30 minutes before starting your workout.

XS Muscle Multiplier*† Essential Amino Acid Supplement - mix one scoop with water immediately post workout. Muscle Multiplier*† can also be taken prior to and during your workout and on non-training days to support muscle growth and reduce muscle tissue breakdown.†

XS Post-Workout Recovery - mix one level scoop with 12-16 fl oz of water and consume within 30 minutes post-exercise to start recovering faster.†

Nutrilite Vitamin B Dual Action - take one tablet daily, preferably with a meal for 8 hours of B vitamins for energy support.†

†This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

*When combined with regular weight/resistance training and a healthy, balanced diet. 

XSPeakPerformanceSolution-spb-en-US-m-01.jpeg

New regimen essentials

Follow these steps to incorporate the Peak Performance Stack regimen into your healthy diet and workout routine, supercharge your training and push to new limits.

XS Pre-Workout Boost - mix one stick pack in 12-16 fl oz of water or juice and consume 15-30 minutes before starting your workout.

XS Muscle Multiplier*† Essential Amino Acid Supplement - mix one scoop with water immediately post workout. Muscle Multiplier*† can also be taken prior to and during your workout and on non-training days to support muscle growth and reduce muscle tissue breakdown.†

XS Post-Workout Recovery - mix one level scoop with 12-16 fl oz of water and consume within 30 minutes post-exercise to start recovering faster.†

Nutrilite Vitamin B Dual Action - take one tablet daily, preferably with a meal for 8 hours of B vitamins for energy support.†

†This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

*When combined with regular weight/resistance training and a healthy, balanced diet. 

Why is a signature and proof of age required for this product and not others?

New York law imposes the requirements for certain dietary supplements making “weight loss” or "muscle building" claims. Only those products making these claims require a signature and age verification upon delivery. For states with these mandates, products will also be charged an additional fee. This fee covers additional order handling costs and will be shown in your cart at checkout. LEARN MORE