Pure L-Theanine

Suggested Use

Directions: As a dietary supplement; take 1 scoop one to three times daily. For best results; please consult your physician.

• 

  Micro Ingredients L-Theanine Softgels

  Micro Ingredients4.7(9)

  $24.95
• 

  Micro Ingredients Pure L-Theanine Powder

  eBay - kazanonline3.8(54)

  $24.66
• 

  Spring Valley L-Theanine Capsules 100 mg 100 Count

  Walmart4.4(296)

  $6.43Lowest
• 

  100g/200g Micro Ingredients L-Theanine Daily Supplements essence extra Powder Filler Free Non-GMO Soy free 99% Pure

  Etsy - Seller

  $30.25
• 

  Micro Ingredients Softgels

  Target4.9(18)

  $28.99
• 

  L-Theanine Pure Encapsulations

  Supplement First4.7(149)

  $65.50
• 

  Walgreens L-Theanine 200 mg Capsules (60 ct)

  Walgreens.com4.0(4)

  $14.99
• 

  Pure L-Theanine

  PartiQlar

  $64.99

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• Suppz Nutrition Store

  4.9 (122)

  Vitamin & supplements store

  3500 Dodge St APT 115, Dubuque, IA 52003

  Directions(563) 582-5741

• Wittman's Nutrition Center

  5.0 (14)

  Vitamin & supplements store

  2600 Dodge St # B5, Dubuque, IA 52003

  Directions(563) 557-9067

• GNC

  3.5 (13)

  Vitamin & supplements store

  555 John F Kennedy Rd #607, Dubuque, IA 52002

  Directions(563) 690-6742

• Next Level Energy

  4.8 (30)

  Vitamin & supplements store

  3345 Hillcrest Rd, Dubuque, IA 52002

  Directions(563) 451-4832

• The Spot Nutrition

  4.8 (125)

  Wellness center

  356 Main St, Dubuque, IA 52001

  Directions(224) 566-3934

• NUTRI-BODIES, LLC

  5.0 (5)

  Vitamin & supplements store

  14858 W Ridge Ln #4, Dubuque, IA 52003

  Directions(563) 588-4000

• NuFit

  5.0 (6)

  Vitamin & supplements store

  5555 Saratoga Rd, Asbury, IA 52002

  Directions(563) 581-6583

• West End Nutrition

  4.7 (37)

  Tea store

  2255 John F Kennedy Rd Ste 600, Dubuque, IA 52002

  Directions(563) 451-0414

• l-theanine: From tea leaf to trending supplement–does the science match the hype for brain health and relaxation?

  R Dashwood, F Visioli - Nutrition Research, 2025 - Elsevier

  … of this nutraceutical supplement marketed for brain health and … in the use of l-theanine supplements at pharmacologic doses … this trending supplement for brain health and relaxation. …

  202525 citations

• L-Theanine: An astounding sui generis integrant in tea

  E Sharma, R Joshi, A Gulati - Food chemistry, 2018 - Elsevier

  l-theanine (l-Th), a non-protein amino acid present in tea, is a valuable nutraceutical product with unique health benefits and used as an additive in food industry. l-Th enhances the …

  2018137 citations

• L-theanine: A potential multifaceted natural bioactive amide as health supplement

  R Adhikary, V Mandal - Asian Pacific Journal of Tropical Biomedicine, 2017 - Elsevier

  … in modern therapeutics, which are used to prepare antibiotics, growth supplements or some other therapeutics. l-theanine is such a bioactive amide amino acid presented in different …

  201778 citations

• Physicochemical, antioxidant and sensory properties of Mango Sorbet containing L-theanine as a potential functional food product

  J Williams, NM D'Cunha, J Kellett… - Journal of Food Science …, 2022 - Springer

  … The non-proteinous amino acid L-theanine (L-THE) is associated with a range of health benefits including improvements in immune function, cardiovascular outcomes and cognition. …

  20229 citations

• The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis

  A Bulman, NM D'Cunha, W Marx, M Turner… - … medicine reviews, 2025 - Elsevier

  … This systematic review ansd meta-analysis aimed to evaluate the effects of L-theanine, a non-… of L-theanine supplementation on sleep quality in humans of all ages and health status …

  202529 citations

• Psychological effects of dietary components of tea: caffeine and L-theanine

  J Bryan - Nutrition reviews, 2008 - academic.oup.com

  … tea, especially caffeine and the amino acid L-theanine, have an impact on brain activity and … literature on the psychological benefits of caffeine and L-theanine as dietary components of …

  2008190 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2021-09-24. DSLD Label ID: 256701. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.