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The Best Theanine Serene of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Theanine Serene of 2022. Check our ranking below.

2,627 Reviews Scanned

SaleRank No. #1
Source Naturals Theanine Serene with Relora, Calm Mind and Body* - 120 Tablets
  • Theanine Serene with Relora helps stop this vicious cycle by supporting both the mind and body. It features L-theanine to help ease nervousness and support focused attention, and GABA and magnesium for calm & relaxation.
  • Soothes muscle tension and supports a healthy response with the trinity of holy basil, L-theanine, and traditionally used Relora.*
  • Suggested Use: 2 tablets daily.
  • TRUSTED FOR OVER 40 YEARS. Source Naturals was created in 1982 by CEO Ira Goldberg to support each individual's potential to enjoy optimal health
  • MANUFACTURED IN THE USA. Our facility is located in Scotts Valley California.
Rank No. #2
Source Naturals Serene Science L-Theanine with Magnesium and GABA - 120 Tablets
  • Serene Science Theanine Serene contains the amino acid L-theanine, to support relaxation and focused attention, and the calming neurotransmitter GABA.
  • Suggested Use: 2 tablets daily.
  • Suitable for vegetarians. Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, preservatives or artificial color, flavor or fragrance.
  • Over 40 years of trust. source naturals was created in 1982 by ceo ira goldberg to support everyone’s potential to enjoy optimal health.
  • Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration. (FDA)
Rank No. #3
Source Naturals Serene Science L-Theanine, Made with Suntheanine, for Focused Relaxation, 200 mg - 60 Capsules
  • Supports a calm mind without causing drowsiness
  • Helps support focused attention and concentration
  • May help to ease aspects of occasional nervousness and tension.*
  • Formulated with 200 mg of L-theanine*
  • Manufactured in the USA. Manufactured in Scots Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA).
SaleRank No. #4
Source Naturals Theanine Serene, Calm Mind & Body*, with GABA - Vegetarian Formlua - 30 Tablets
  • Source Naturals Theanine Serene contains the amino acid l-theanine, to support relaxation and focused attention, and the calming neurotransmitter GABA.
  • Suggested Use: 2 tablets daily.
  • Suitable For Vegetarians: Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, preservatives, or artificial color, flavor or fragrance.
  • Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support everyone’s potential to enjoy optimal health.
  • Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration. (FDA)
Rank No. #5
GABA L-Theanine 900 mg - Made in USA - Magnesium | Vitamin B6 - Calm, Sleep, Relaxation & Mood Support - 750 mg Gamma AminoButyric Acid, 150 mg L-Theanine - Non-Habit Forming, Vegan - 120 Capsules
  • 750mg GABA Capsules — Discover tranquility in every capsule with our premium 750mg GABA mula. Designed to soothe your mind and body, our potent blend supports relaxation and calmness, helping you find your inner balance amidst life's demands. Experience serenity with each dose, and embrace a harmonious journey to wellness.
  • Calmness Blend — GABA capsules powered with 150mg L-theanine and Magnesium to promote relaxation and mental clarity, helping you find peace & a tranquil mind, ease tension, and foster a sense of calm & well-being. With vitamins B6 & B12 to maintain a healthy nervous system, good mood & overall well-being!
  • Nervous System Support — Tranquility GABA blend to support restful sleep & relaxation, naturally calming the mind and body. Each capsule is crafted to maintain a sense of calm, mental clarity, and good emotional balance, nurture the nervous system, and support cognitive function & overall well-being.
  • Made in USA — Rest assured, our GABA supplement is proudly manufactured in the USA under strict quality control standards, Third Party Tested & GMP certified. We adhere to rigorous procedures to ensure every batch's safety, purity, and efficacy. We use the most potent forms of each component to achieve maximum effect. Highest quality & purity to ensure the best results!
  • Trustworthy Service — We are committed to providing exceptional customer service and transparency with NUTRAHARMONY’s carefully selected GABA capsules! You can trust that you're receiving a premium-quality supplement backed by scientific research and dedicated customer support.
Rank No. #6
L-Theanine 200mg by Nature's Trove - 120 Vegetarian Capsules
  • L-Theanine 200mg may promote relaxation without drowsiness. Also may restores a sense of calm.
  • Found naturally in green tea
  • Natural Ingredients - Good Health from the Source!
  • Made in the USA - GMP NSF Certified Facility - Kosher Certified
  • ►► To SAVE EVEN MORE! Select our SUPER VALUE SIZE - 365 Vegetarian Capsules
SaleRank No. #7
Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free
  • 120 Capsules of L-Theanine Per Bottle
  • 200mg L-Theanine Per Serving (120 Servings)
  • Easy To Take Capsules
  • Non-GMO, Gluten Free
  • Manufactured In a GMP Compliant, FDA Registered Facility
Rank No. #8
Source Naturals Serene Science L-Theanine, Made with Suntheanine, for Focused Relaxation, 200 mg - 30 Capsules
  • Supports a calm mind without causing drowsiness
  • Helps support focused attention and concentration
  • May help to ease aspects of occasional nervousness and tension.*
  • Formulated with 200 mg of L-theanine*
  • Manufactured in the USA. Manufactured in Scots Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA).
Rank No. #9
L-Theanine 200mg with Magnesium Glycinate, 400 Coconut MCT Oil Softgels | Relaxation, Focus & Muscle Support Supplement | 2-in-1 Amino Acid & Mineral Complex | Gentle Care All Day & Night
  • Micro Ingredients offers 2-in-1 L-Theanine with Magnesium Glycinatecoconut oil softgels. A well-absorbed formula combining natural amino acidsand minerals.
  • Each pouch offers 400 easy-to-consume softgels infused with coconut andMCT oil. A long-lasting 200-serving supply, delivering 200mg L-Theanine and200mg Magnesium Glycinate per serving.
  • L-Theanine and magnesium glycinate are important micronutrients thatwork together to support muscle health, relaxation, and focus. Take it in themorning or at night to enjoy their benefits.
  • High bioavailable theanine and magnesium forms for easy digestion. Theaddition of MCT coconut oil offers an easily absorbed healthy carrier foroptimal absorption of nutrients.
  • Premium non-GMO L-Theanine supplements. Made without soy, dairy, andgluten. Ingredients must pass our 3rd party lab tests to ensure a product thatis safe, pure, and potent.
Rank No. #10
Sports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus, Relaxation & Alertness - Non-Drowsy Support Made with Coconut Oil, Non-GMO & Gluten Free - 200mg, 60 Count
  • ALERT & CALM: L-Theanine, commonly found in the flavonoid herbal green tea, is used as an ayurvedic substitute for those who want the antioxidant benefits of green tea but without caffeine. Encapsulated in a once-daily liquid softgel, our L-Theanine supports feelings of relaxation, calm, focus, and alertness*
  • DOUBLE THE SUPPORT: To optimize your potential and give the utmost support, our L-theanine 200 mg amino acid softgels provide double the amount of L-theanine green tea extract commonly found in energy supplements in a convenient max-strength formula
  • PATENTED SUNTHEANINE: Formulated with patented and clinically researched Suntheanine—you get all of the alertness and relaxation (+ the increase in alpha brain waves) without the jitters or crash of caffeine, energy pills, or energy drinks*
  • PREMIUM INGREDIENTS: We hold all of our supplements to a higher standard. Rest assured that your L-Theanine is crafted using 100% organic coconut oil and an entirely non-GMO verified, gluten-free and soy-free product. Manufactured in the USA in cGMP-compliant facilities
  • THE SPORTS RESEARCH DIFFERENCE: Founded in Southern California in 1980, Sports Research is a family-owned business born from a passion for fitness and wellness. Our goal is to embrace the sport of life through research-backed products created for every body—inside and out

Last update on 2025-09-03 / Affiliate links / Images from Amazon Product Advertising API

How Do You Buy The Best Theanine Serene?

Do you get stressed out thinking about shopping for a great Theanine Serene? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching Theanine Serene, which is why we have assembled a comprehensive list of the greatest Theanine Serene available in the current market. We’ve also come up with a list of questions that you probably have yourself.

We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Theanine Serene that you consider buying. Your questions might include the following:

  • Is it worth buying an Theanine Serene?
  • What benefits are there with buying an Theanine Serene?
  • What factors deserve consideration when shopping for an effective Theanine Serene?
  • Why is it crucial to invest in any Theanine Serene, much less the best one?
  • Which Theanine Serene are good in the current market?
  • Where can you find information like this about Theanine Serene?

We’re convinced that you likely have far more questions than just these regarding Theanine Serene, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Theanine Serene, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Theanine Serene. Make sure that you are only using trustworthy and credible websites and sources.

We provide an Theanine Serene buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Theanine Serene currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Theanine Serene has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Theanine Serene?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Theanine Serene.
  5. Customer Ratings: Number ratings grade Theanine Serene objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Theanine Serene.
  7. Product Quality: You don’t always get what you pay for with an Theanine Serene, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Theanine Serene is should be an indication of how long it will work out for you.

We always remember that maintaining Theanine Serene information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Theanine Serene is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.

FAQ:

Q: What does theanine do for your body?

A: Theanine is also taken by mouth for reducing blood pressure, preventing the flu, and improving how well cancer drugs work as well as decreasing the side effects of cancer drugs. How does it work? Theanine has a chemical structure very similar to glutamate, a naturally occurring amino acid in the body that helps transmit nerve impulses in the brain.

Q: How much Theanine is safe?

A: Although the FDA has reaffirmed their classification of supplements containing L-theanine as “generally recognized as safe,” it is important to remember that the doses in many nutritional supplements far exceed the 20 mg generally considered to be safe.

Q: When to take theanine supplement?

A: L-theanine is also great when taken in supplement stacks. It has a synergistic relationship with a number of other supplements. You can take L-Theanine in the evening before sleep, in the morning before work, or at any point in the day when you’d like to feel more relaxed.

Q: What are the effects of theanine?

A: Appetite Loss. Lower blood pressure. Difficulty concentrating. Diarrhea. Dizziness. Gastrointestinal Discomfort. Headaches. Nausea. Potential Interactions. Over-relaxation/L-Theanine high.

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