Skip to main content
​Can L-Theanine Truly Increase Testosterone Levels? Truth Unveiled

​Can L-Theanine Truly Increase Testosterone Levels? Truth Unveiled

Posted by Leonard Shemtob on Feb 19, 2024

In the quest for optimizing health and vitality, the connection between L-theanine and testosterone levels has become a topic of growing interest. Many wonder if L-Theanine, a natural amino acid found in tea leaves, can truly elevate testosterone levels.

But what's the real story? Can this soothing component truly pack a testosterone punch, or is it just another internet health myth?

This article aims to dissect fact from fiction and delve into the intriguing connection between L-Theanine and testosterone. We'll delve into the benefits of L-Theanine, examining how this compound goes beyond its calming properties. Moreover, we'll guide you through the best L-Theanine supplements available in the market, helping you make an informed choice for your health journey.

For those seeking an extra boost in testosterone, we'll explore the best testosterone booster supplement. We'll also highlight a supplement stack that not only contains L-theanine but also contributes to increased testosterone levels. 

Get ready to uncover the secrets of L-Theanine and discover the supplements that can naturally enhance your testosterone production.

Short Summary

  • Myth or miracle? This article dives into the science behind L-Theanine's potential to boost testosterone levels, separating fact from fiction.
  • Beyond testosterone: Discover the various benefits of L-Theanine beyond its calming effects, including stress reduction and cognitive enhancement.
  • Selecting the Best L-Theanine Supplement: Learn about the best L-Theanine supplement available in the market, Youth GH by Vital Alchemy, for those interested in trying it out.
  • Exploring Testosterone Booster Supplement: Delve into the world of a testosterone booster supplement, Sergeant Steel by Assault Labs, and kickstart your journey towards enhanced testosterone levels.
  • The Perfect Blend: L-Theanine + Testosterone Support: Uncover the ideal supplement stack that seamlessly combines L-Theanine with testosterone-enhancing components, GH Amplifier Stack, offering a holistic approach to health and vitality.

Quick Picks

  1. Youth GH by Vital Alchemy – Best Night Time L-Theanine Supplement
  2. Sergeant Steel by Assault Labs – Best Day Time Test Booster
  3. GH Amplifier Stack – Best Stack Contain Both Test Booster + L-Theanine

Understanding L-Theanine

L-Theanine is a naturally occurring compound found in tea leaves, particularly in green tea (Camellia sinensis). It's recognized for its calming properties and is renowned for its potential to promote relaxation without inducing drowsiness. 

It has been shown to boost alpha brain waves, which are related to a relaxed and alert mental state. This makes L-theanine an attractive option for those seeking to improve their mental well-being and reduce stress-related symptoms.

Health Benefits of L-Theanine

Stress Reduction: L-theanine is recognized for its calming effects and anti-anxiety properties, providing a sense of relaxation without inducing drowsiness. This makes it a potential ally in managing stress and promoting a tranquil state of mind.

Cognitive Function: It has been shown to enhance cognitive function, including memory, attention, and reaction time. This makes L-theanine an attractive option for those seeking to enhance their cognitive abilities.

Sleep Quality: L-theanine has been shown to enhance sleep quality, including decreasing the time it takes to fall asleep and improving the duration of sleep.

Mood Enhancement: L-theanine has been shown to boost mood and diminish symptoms of depression and anxiety. This makes L-theanine an attractive option for those seeking to improve their mental health.

Improved mental focus and attention: L-theanine has been shown to improve attention and focus, helping you stay alert during your extended training period.

Immune system support: L-theanine may support the body in fighting off illness.

Antioxidant Properties: Beyond its effects on mood and stress, L-Theanine boasts antioxidant properties. This means it may help combat oxidative stress in the body, potentially contributing to overall health and well-being.

Does L-Theanine Really Increase Testosterone?

Limited research exists on the impact of L-Theanine on testosterone levels. However, some research suggests that it may potentially positively impact male hormone levels.

A study in the Journal of Clinical Nutrition found a small increase in testosterone levels in men taking L-theanine daily for four weeks. Another study saw a rise in testosterone levels in mice with L-theanine supplementation.

While these studies hint at a potential link between L-theanine and increased testosterone, more research is necessary to confirm and determine the right dosage and duration for supplementation.

Best L-Theanine Supplement: Youth GH by Vital Alchemy

Youth GH by Vital Alchemy

Do you yearn for the vitality of your younger days when being lean, building muscle effortlessly, and enjoying swift recovery was the norm?

Enter Youth GH – your key to slowing down the aging process and revving up your gains! Our Youth Growth Sleep Supplement is meticulously crafted with a potent blend of natural vitamins and minerals, carefully selected to foster holistic health and vitality.

Harnessing the latest advancements in ingredient research, Youth GH integrates 11 meticulously dosed components to stimulate growth hormone production. This comprehensive formula supports increased energy levels, lean muscle growth, fat loss, enhanced muscle recovery, and an overall uplifted mood.

Key Ingredients of Youth GH

L-Theanine: An amino acid from tea leaves known to enhance attention, reduce stress, and act as a relaxing agent without diminishing the benefits of stimulants.


  • Regulates Ghrelin, the hunger hormone.
  • Effective in treating Cachexia, promoting appetite and lean body mass.
  • Stimulates Ghrelin, leading to increased appetite and growth hormone release for fat breakdown and muscle growth.


  • Amino acid aids the urea cycle.
  • Promotes growth hormone release, reducing fatigue during prolonged exercise.
  • Promotes secretion of ammonia accumulated from exercises, enhancing endurance.

Gamma-Aminobuttryic Acid (GABA): A neurotransmitter that aids nerve impulse communication and promotes healthy hormone production. It induces relaxation and facilitates faster sleep onset.

Mucuna Pruriens: A precursor to dopamine, it is involved in mental processes like motivation, mood, and muscle movement. Research suggests its role in supporting lean muscle growth and maintaining normal hormone levels.

Valerian Root Extract: Supports sleep quality and induces relaxation.

Melatonin: A naturally-occurring hormone that helps normalize sleep patterns, proven to aid in falling asleep and improving sleep quality.

Key Benefits of Youth GH

  • It increases your growth hormone production.
  • It improves muscle mass.
  • It helps reduce body fat.
  • It prevents muscle wasting.
  • It enhances appetite.
  • It supports deep, restful sleep.
  • It increases your energy levels.
  • It boosts your mood and concentration.
  • It improves your memory.
  • It promotes muscle recovery.
  • It helps build strong bones and tendons.

Customer Reviews: Youth GH by Vital Alchemy

5-stars.png5 Stars

“Comfortable side effects, and very effective results. Definitely assist in progress.”


5-stars.pngAmazing Results

“This product really helps me sleep at night. Prior to taking the product, my might struggled with shutting down at night. When I take Youth GH one hour prior to going to bed, I am able to obtain at least 8 hours of uninterrupted sleep.”


5-stars.pngall time favorite GH booster

“ive tried a lot of supposed ****** hormone boosters to no avail. but youth gh was definitely somethin else

amazing pumps, slept like a baby, and definitely noticed changes in terms of lean muscle ****** and development.

used it for a full 8 weeks along with anafuse, sergeant steel, and bio-gro.”

-Trevor G.

Best Testosterone Booster: Sergeant Steel by Assault Labs

Sergeant Steel by Assault Labs

Sergeant Steel is a military-grade testosterone booster designed to launch a volcanic surge of testosterone in your body. This powerful supplement is formulated with an elite squad of 16 effectively dosed ingredients to support you with more strength, endurance, and muscle mass while revitalizing your libido and sense of well-being.

Sergeant Steel is designed to help you achieve peak physical performance by increasing your testosterone levels. With more testosterone, you can experience increased strength, endurance, and muscle mass. Additionally, Sergeant Steel can help revitalize your libido and improve your overall sense of well-being.

Key Ingredients of Sergeant Steel

D-Aspartic Acid: An amino acid found in neuroendocrine tissues, DAA has been proven to increase testosterone levels by 42% after 12 days of regular use. 

This increase in testosterone supports muscle growth. Additionally, it also enhances nitric oxide production, supporting faster recovery after workouts.

KSM-66® Ashwagandha Root Extract: Also known as Ashwagandha, this adaptogen helps manage anxiety. It enhances semen quality by increasing testosterone and LH levels. It also reduces cortisol to prevent muscle loss and fat gain.

Mucuna Pruriens: Acts as a precursor to Dopamine, which is involved in mental processes like mood, attention, motivation, memory, voluntary muscular movement, and learning. It supports lean muscle growth and normal hormone levels in men and women.

Nettle Extract (Urtica Dioica): Inhibits Sex Hormone Binding Globulin (SHBG), indirectly boosting testosterone levels.

Fenugreek: Demonstrates a significant impact on libido and helps maintain testosterone levels. Studies show it can increase testosterone levels, strength output, and growth hormone levels while reducing DHT.

Shilajit: A nutrient-rich substance with medicinal humic and fulvic acids, known for centuries as a carrier of energy and nutrition. Recent studies suggest it can boost testosterone secretion and stimulation.

LJ100: A patented MIT-developed extract for sexual dysfunction and male fertility. Tonagt Ali enhances sex drive in many ways, like by influencing free testosterone, sex hormone binding globulin (SHBG), and aromatase activity.

Dehydroabietic Acid (DHAA): A potent ingredient with anti-estrogen effects, preventing the conversion of testosterone to estrogen. It also supports weight loss by boosting adiponectin production.

Tribulus Extract: Widely used for boosting testosterone, recent studies show a 12% increase in testosterone levels and a 20% increase in IGF-1 levels.

Maca Extract: A broccoli family member known to enhance fertility by increasing sperm production. It also inhibits prostate growth, reducing the conversion of testosterone to DHT.

Boron: An essential mineral for bone growth, Boron also helps reduce SHBG levels, promoting increased testosterone levels.

Key Benefits of Sergeant Steel

  • It increases testosterone levels.
  • It enhances nitric oxide levels.
  • It improves your overall mood.
  • It boosts your muscle mass.
  • It increases luteinizing hormone production.
  • It helps reduce estrogen levels.
  • It reduces stress hormone (cortisol) levels.
  • It supports your muscle recovery.
  • It improves your strength.
  • It boosts your libido.
  • It blocks DHT.

Customer Reviews: Sergeant Steel by Assault Labs

5-stars.pngStrong Test Booster!

“Sergeant Steel is pretty strong! I have used Apex Male in the past and Sergeant Steel seems to out perform from a motivation and performance standpoint.”

-Tracy G.

5-stars.pngGreat supplement

“This has definitely put me back on a good track. I feel more energy, more hype to hit those weights and more efficient exercise. I am pushing through a full body workout with 40 lb kettlebells which is nice. Recovery is fantastic as well. Definitely going to stack this.”


5-stars.pngBest natty test booster

“I have tried just DAA and a few other natty test boosters, but this stuff is legit. I run it after my pct between cycles and I feel like it really helps maintain my gains and definitely keeps my mood and libido up. Good stuff right here.”


Best L-Theanine + Testosterone Support Stack: GH Amplifier Stack

GH Amplifier Stack

The GH Amplifier Stack, consisting of Youth GH, Pure IGF by Pure Solutions, and Bio-Gro, is designed to naturally stimulate growth hormone (GH) production, aid recovery, and boost overall muscle gains and performance. 

This carefully curated GH Amplifier Stack is crafted to support users in efficiently reaching their muscle development goals.

Supplements Included in This Stack

1- Vital Alchemy's Youth GH

Youth GH by Vital Alchemy is a powerful supplement blending 11 carefully dosed ingredients to boost energy, promote lean muscle gains, aid fat loss, accelerate muscle recovery, and enhance overall mood. 

Key components like Rikkunshito, L-Ornithine, GABA, Mucuna Pruriens, Valerian Root Extract, L-Theanine, and Melatonin synergize to increase GH production, stimulate appetite, ensure restful sleep, strengthen bones and tendons, uplift mood, and enhance memory.

2- Pure Factors IGF 600

Crafted for bodybuilders and athletes, Pure Factors Ultimate Pro IGF 600 harnesses the power of a concentrated GH factor matrix and co-factors sourced from New Zealand Deer Velvet Antler

This supplement supports recovery and metabolic processes at the cellular level, working to prevent muscle breakdown, enhance fat burning, boost stamina and endurance, improve skin condition, combat acne, and reduce hair loss. Ideal for ongoing use, it serves as daily support during training and athletic performance.

3- iSatori's Bio-Gro

Bio-Gro by iSatori is a cutting-edge supplement packed with bio-active peptides that supercharge protein synthesis for lean muscle development and enhanced recovery. This zero-calorie powerhouse is more concentrated than traditional protein powders, with just one small scoop providing the bio-actives equivalent to 25 grams of whey protein concentrate. 

Designed to reduce muscle soreness, Bio-Gro caters to both women and men, offering flavored and unflavored options. Derived from natural sources, it's a safe choice for everyone. Research suggests that Bio-Gro can lead to significant gains in total body mass and amplify strength and power.

Key Benefits of GH Amplifier Stack

  • It increases protein synthesis.
  • It improves lean muscle mass.
  • It accelerates muscle recovery.
  • It helps prevent muscle catabolism.
  • It reduces muscle soreness.
  • It increases your energy levels.
  • It boosts your stamina during an intense workout.
  • It enhances your appetite.
  • It improves fat loss.
  • It supports deep, restful sleep.
  • It boosts your mood.
  • It supports metabolism.
  • It improves your cognitive function, memory, and attention.
  • It supports your hair, skin, and nails.

Frequently Asked Questions (FAQs)

Q: Does L-theanine increase testosterone levels?

A: While direct evidence of L-theanine increasing testosterone levels in humans is limited, some studies suggest that L-theanine may have a positive effect on testosterone production through its influence on stress and relaxation.

Q: What are the potential benefits of L-Theanine?

A: L-Theanine is known for its calming effects, stress reduction, cognitive enhancement, improved sleep quality, mood regulation, and even immune system support.

Q: How long does it take to see results from using these supplements?

A: Results may vary among individuals. Consistency in supplement use, coupled with a healthy lifestyle and regular exercise, is key to achieving desired outcomes. It's recommended to follow suggested usage guidelines and be patient for noticeable changes.

Q: Is L-Theanine safe to use?

A: Yes, L-Theanine is generally considered safe for people to take as a supplement. However, it is important to consult a healthcare provider before starting these supplements to get their advice on dosage. Women who are pregnant or breastfeeding should not use L-Theanine.

Final Thoughts

In conclusion, the potential link between L-theanine and increased testosterone levels is a topic of growing interest in the quest for improved health and vitality. 

While L-theanine is recognized for its calming properties and various health benefits, including stress reduction, improved cognitive function, and sleep quality, limited research exists on its impact on testosterone levels.

Some studies have stated a potential increase in testosterone levels with L-theanine supplementation, but more research is needed to confirm these findings and determine the best dosage and duration for supplementation.

Additionally, the article provides insights into the best L-theanine supplements, testosterone booster supplements, and supplement stacks available in the market, offering readers the opportunity to make informed decisions for their health and wellness journey.


Written and Sponsored by Leonard Shemtob

Leonard Shemtob is President of Strong Supplements. Leonard has been in the supplement space for over 20 years, specializing in fitness supplements and nutrition. Leonard appears on many podcasts, written over 100 articles about supplements and has studied nutrition, supplementation and bodybuilding. 

Leonard's articles have been published in many top publications around the web. Leonard enjoys weight training, playing basketball and yoga, and also enjoys hiking. In his free time he studies and works on improving himself. For more detailed information, visit his official blog.