Description

Optimize your workout results and build the lean muscle mass that boosts strength. Thorne’s Amino Complex formula also enhances cellular energy production.* 

Amino acids are the building blocks of protein. They fuel muscle gain and other physiological functions, including enzyme production, hormone regulation, cognitive ability, neurotransmitter balance, metabolism, and energy production. As we age, we lose muscle mass, which can cause other health issues, so it is important to promote the growth of lean muscle mass.

Of the 20 amino acids that make up protein, nine are classified as essential amino acids (EAAs), those the body cannot produce itself. Therefore, they must be consumed through diet and supplementation to support the body’s internal production of energy.  

Thorne’s Amino Complex is a comprehensive blend of EAAs, which is high in branched-chain amino acids (BCAAs) – a group of amino acids that promote the growth of lean muscle mass and enhance muscle strength.* 


EAAs benefit the body in multiple ways

  • Support muscle repair and recovery*
  • Reduce muscle soreness*
  • Benefit muscle strength*
  • Support lean muscle mass*
  • Increase cellular energy production*
  • Promote healthy blood sugar already within the normal range*
  • Support cardiovascular health*
  • Strengthen connective tissue* 


Who can benefit from Thorne Amino Complex

  • Athletes, to support training and fitness
  • The elderly, who need to preserve muscle mass
  • A person recovering from muscle injury or overuse
  • Anyone needing readily bioavailable amino acids for protein building 


Features of Thorne Amino Complex

  • Available in two flavors - lemon and berry
  • Available in bulk powder or individual stick pack servings
  • NSF Certified for Sport®
  • Lightly sweetened
  • Mixes easily in warm or cold liquid
  • Contains flavors and sweeteners derived from natural flavors


How to take Thorne Amino Complex

Amino Complex is best taken after a workout to facilitate the recovery process.* It’s an ideal formula for active individuals, individuals managing calories, or anyone who has difficulty consuming whole foods or protein powders, particularly after heavy exercise.

Because athletes need to know their supplements are trustworthy and compliant, every batch of an NSF Certified for Sport® product is tested for compliance with label claims and to ensure the absence of nearly 300 substances banned by many major athletic organizations. 

Suggested Use:

Mix 1 scoop with at least 8 ounces of water one to two times daily or as recommended by your health-care practitioner.

Warnings:

CALIFORNIA WARNING

Risk of reproductive harm from exposure to lead. See www.P65Warnings.ca.gov/food.

ALLERGY WARNING

This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.

PREGNANCY WARNING

If pregnant or nursing, do not use this product.

INTERACTIONS

There are no known adverse interactions or contraindications at publication date.

NOTICE FOR NEW YORK RESIDENTS

New York law prohibits the sale of this product to individuals under the age of eighteen.

FAQs
Frequently asked question

Is Amino Complex worth buying compared to a regular protein powder?

Amino Complex is a great choice if you want a targeted, efficient formula without the calories or fillers found in many protein powders. It delivers essential amino acids directly, making it ideal for muscle recovery, lean mass building, and energy support. It's especially useful around workouts or for those who want amino acid benefits without a full protein shake.

Where can I buy Thorne Amino Complex in Lemon flavor and is it available for subscription?

Thorne Amino Complex in Lemon is available directly on this page. Purchasing here ensures you receive an authentic product. Many customers choose a subscribe-and-save option to maintain consistent supplementation, which is key for seeing long-term muscle and energy benefits. Check the product page for current subscription discounts and bundle availability.

What are amino acids and why do they matter for muscle building?

Amino acids are the building blocks of protein, essential for muscle repair, growth, and many body functions including hormone regulation, metabolism, and energy production. When you exercise, your muscles break down and need amino acids to rebuild stronger. Supplementing ensures your body has adequate supply, especially important as natural muscle mass tends to decline with age.

When is the best time to take Amino Complex for optimal results?

Amino Complex is most effective when taken around your workout, either before, during, or after exercise. Pre-workout use can fuel performance, while post-workout consumption supports muscle recovery. Some users also take it between meals to maintain steady amino acid levels throughout the day. Consistency matters most for building lean muscle mass over time.

Does Amino Complex help with energy, or is it only for muscle building?

Amino Complex supports both goals. While it's designed to promote lean muscle growth, the formula also enhances cellular energy production. Amino acids play a role in metabolism and neurotransmitter balance, which can contribute to improved focus and sustained energy during workouts and daily activity. It's a well-rounded supplement beyond just muscle support.

Is Thorne Amino Complex suitable for older adults concerned about muscle loss?

Yes, it's an excellent option for older adults. Muscle mass naturally declines with age, a process called sarcopenia, which can impact strength, mobility, and overall health. Thorne's Amino Complex provides targeted amino acids that help counteract this loss, supporting muscle maintenance and growth alongside regular physical activity and a balanced diet.

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