Muscle Gains Stack

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4.9 out of 5 stars. 261 reviews

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

Stack up your gains before, during and after your training.

We build muscle through resistance training, which creates micro tears in muscles, and by consuming protein and essential amino acids (EAAs) which help repair and create new muscle fibers. This stack is designed to help you push your workouts to new limits and help gain lean muscle mass with regular training or exercise and a healthy diet. XS Pre-Workout Boost supplies a rush of energy to help you crush your training. XS Muscle Multiplier*^†, XS Grass-Fed Whey and XS Sport Nutrition Bars make increasing your protein and amino acids intake all the more enjoyable and convenient. Plus Nutrilite™ Joint Health to help support your joints.^†

^{†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}

Outperform your best

XS Pre-Workout Boost supplement provides essential energy to help support your endurance and focus so you can crush your workouts.† CarnoSyn®* Beta Alanine helps increase oxygen and nutrients to pump your workouts, while the natural caffeine and rhodiola rosea give your body a boost of energy to jump start your workout.†

^{*CarnoSyn® is a registered trademark of Natural Alternatives International, Inc.
†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.}

Fuel lean muscle

To optimize your muscle building investment, amino acids like those in XS Muscle Multiplier*^† supplements are a game changer. While protein gets converted to amino acids, the essential amino acids in XS Muscle Multiplier*^† supplement rapidly get used by muscles to start repairing and building muscle mass immediately after your workouts.*^†

^{*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.}

XS Grass-Fed Whey Chocolate, Strawberry and Vanilla

Protein anytime

It’s no old tale that muscles are truly built outside the gym and your muscles will need plenty of protein and amino acids to do so— at least a gram of protein per pound of body weight! XS Protein Pods and Sports Nutrition Bars allow you to add more protein to your diet without missing a beat!

Support healthy joints

Post workout, Nutrilite Joint Health supplement provides a blend of seven powerful joint-supporting ingredients, including clinically significant levels of glucosamine and chondroitin to support joint cartilage and connective tissue.^†

^{†This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, or cure.}

Outperform your best

XS Pre-Workout Boost supplement provides essential energy to help support your endurance and focus so you can crush your workouts.† CarnoSyn®* Beta Alanine helps increase oxygen and nutrients to pump your workouts, while the natural caffeine and rhodiola rosea give your body a boost of energy to jump start your workout.†

^{*CarnoSyn® is a registered trademark of Natural Alternatives International, Inc.
†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.}

Fuel lean muscle

To optimize your muscle building investment, amino acids like those in XS Muscle Multiplier*^† supplements are a game changer. While protein gets converted to amino acids, the essential amino acids in XS Muscle Multiplier*^† supplement rapidly get used by muscles to start repairing and building muscle mass immediately after your workouts.*^†

^{*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.}

Protein anytime

It’s no old tale that muscles are truly built outside the gym and your muscles will need plenty of protein and amino acids to do so— at least a gram of protein per pound of body weight! XS Protein Pods and Sports Nutrition Bars allow you to add more protein to your diet without missing a beat!

Support healthy joints

Post workout, Nutrilite Joint Health supplement provides a blend of seven powerful joint-supporting ingredients, including clinically significant levels of glucosamine and chondroitin to support joint cartilage and connective tissue.^†

^{†This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, or cure.}

Outperform your best

XS Pre-Workout Boost supplement provides essential energy to help support your endurance and focus so you can crush your workouts.† CarnoSyn®* Beta Alanine helps increase oxygen and nutrients to pump your workouts, while the natural caffeine and rhodiola rosea give your body a boost of energy to jump start your workout.†

^{*CarnoSyn® is a registered trademark of Natural Alternatives International, Inc.
†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.}

Fuel lean muscle

To optimize your muscle building investment, amino acids like those in XS Muscle Multiplier*^† supplements are a game changer. While protein gets converted to amino acids, the essential amino acids in XS Muscle Multiplier*^† supplement rapidly get used by muscles to start repairing and building muscle mass immediately after your workouts.*^†

^{*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.}

Protein anytime

It’s no old tale that muscles are truly built outside the gym and your muscles will need plenty of protein and amino acids to do so— at least a gram of protein per pound of body weight! XS Protein Pods and Sports Nutrition Bars allow you to add more protein to your diet without missing a beat!

Support healthy joints

Post workout, Nutrilite Joint Health supplement provides a blend of seven powerful joint-supporting ingredients, including clinically significant levels of glucosamine and chondroitin to support joint cartilage and connective tissue.^†

^{†This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, or cure.}

New regimen essentials.

Follow these steps to incorporate the Muscle Gains Stack regimen into your routine and support your goal of gaining and retaining muscle.

XS Pre-Workout Boost - Mix one stick pack in 12-16 fl oz of water or juice and consume 20-30 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.^†

XS Grass-Fed Whey and Sports Protein Bars - enjoy any time post workout or throughout the day to fill protein gaps in your diet and support muscle growth.^†

Nutrilite Joint Health - take two tablets twice a day, preferably with a meal to support joint cartilage and connective tissue.^†

^{†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.}

New regimen essentials.

Follow these steps to incorporate the Muscle Gains Stack regimen into your routine and support your goal of gaining and retaining muscle.

XS Pre-Workout Boost - Mix one stick pack in 12-16 fl oz of water or juice and consume 20-30 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.^†

XS Grass-Fed Whey and Sports Protein Bars - enjoy any time post workout or throughout the day to fill protein gaps in your diet and support muscle growth.^†

Nutrilite Joint Health - take two tablets twice a day, preferably with a meal to support joint cartilage and connective tissue.^†

^{†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.}

New regimen essentials.

Follow these steps to incorporate the Muscle Gains Stack regimen into your routine and support your goal of gaining and retaining muscle.

XS Pre-Workout Boost - Mix one stick pack in 12-16 fl oz of water or juice and consume 20-30 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.^†

XS Grass-Fed Whey and Sports Protein Bars - enjoy any time post workout or throughout the day to fill protein gaps in your diet and support muscle growth.^†

Nutrilite Joint Health - take two tablets twice a day, preferably with a meal to support joint cartilage and connective tissue.^†

^{†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.}

XS Fitness Program

Start your adventure to a better, healthier life! Level up your fitness game with the XS 30-Day Toning Program, designed to support your entire journey toward building strength and stamina and a more toned physique. And you won’t be going it alone! With access to some of the best XS trainers and products to fuel your success, we’ve got your back every step of the way.

We’ll give you the tools and it’s up to you to put in the work. Get started, make a change, and have some fun!

Learn More

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XS Fitness Program

Start your adventure to a better, healthier life! Level up your fitness game with the XS 30-Day Toning Program, designed to support your entire journey toward building strength and stamina and a more toned physique. And you won’t be going it alone! With access to some of the best XS trainers and products to fuel your success, we’ve got your back every step of the way.

We’ll give you the tools and it’s up to you to put in the work. Get started, make a change, and have some fun!

Learn More

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Duration 0:27

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Current Time 0:00

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Duration 0:27

Loaded: 0%

Progress: 0%

Stream Type LIVE

Remaining Time -0:27

XS Fitness Program

Start your adventure to a better, healthier life! Level up your fitness game with the XS 30-Day Toning Program, designed to support your entire journey toward building strength and stamina and a more toned physique. And you won’t be going it alone! With access to some of the best XS trainers and products to fuel your success, we’ve got your back every step of the way.

We’ll give you the tools and it’s up to you to put in the work. Get started, make a change, and have some fun!

Learn More