Caffeine 100 mg with L-Theanine 100 mg®

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Serving Size: 1 Capsule(s) · 1 per day

Not Present

• 

  Nutricost Caffeine + L-Theanine Capsules

  iHerb4.7(1100)

  $13.95
• 

  Nutricost Caffeine

  Target4.6(1400)

  $17.95
• 

  Nutricost Natural Caffeine Capsules

  Nutricost4.2(490)

  $19.97
• 

  Nutricost Energy Clean Energy Powder

  Nutricost4.8(8)

  $26.97
• 

  Nutricost Energy Complex Capsules

  Nutricost4.7(62)

  $14.97
• 

  Nutricost L-Theanine Capsules

  Target4.8(7400)

  $8.99
• 

  Nutricost Energy Powder

  Nutricost4.7(100)

  $21.97
• 

  Nutricost Pre-Workout Complex Powder

  Walmart - eSupplements, llc4.6(1200)

  $37.95

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• ITL Health

  5.0 (37)

  Vitamin & Supplements Shop

  50 Broadway, London SW1H 0BL

  Directions0118 321 7628

• Protiv Nutrition

  5.0 (1)

  Vitamin & Supplements Shop

  3rd Floor, 207 Regent St., London W1B 3HH

  Directions07442 915758

• Prodentim

  5.0 (1)

  Vitamin & Supplements Shop

  72 Regent St., London W1B 4EN

  Directions028 6745 7567

• Holland & Barrett - Covent Garden

  3.7 (60)

  Vitamin & Supplements Shop

  39 Long Acre, London WC2E 9LG

  Directions0330 058 2640

• RightNutri

  4.9 (78)

  Vitamin & Supplements Shop

  26 Queenstown Rd, London SW8 3RX

  Directions0800 098 8888

• British Supplements

  3.4 (275)

  Vitamin & Supplements Shop

  34, New House, 67-68 Hatton Garden, London EC1N 8JY

  Directions07768 405406

• Holland & Barrett - Tottenham Court Road 2

  4.2 (52)

  Vitamin & Supplements Shop

  253-254, 253-254 Tottenham Ct Rd, The Avenue, London W1T 7RD

  Directions0330 058 2640

• Holland & Barrett - Maddox Street

  4.3 (52)

  Vitamin & Supplements Shop

  6-8 Maddox St, London W1S 1NR

  Directions0330 058 2640

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

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

  … , in comparison with the benzodiazepine alprazolam, on self-reported measures of anxiety in 16 healthy volunteers. This study tested the relaxing and anxiolytic effects of …

  2008190 citations

• 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

  … When combined with caffeine, l-theanine may improve … in the use of l-theanine supplements at pharmacologic doses by … behind this trending supplement for brain health and relaxation. …

  202526 citations

• … of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic …

  ER Payne, M Aceves-Martins, J Dubost… - Nutrition …, 2025 - academic.oup.com

  … , such as caffeine, l-theanine (theanine herein), and tea polyphenols, 1 , 2 have the potential to improve one’s health and well-being. Drinking black tea and supplementation with green …

  202514 citations

• Anti-stress, behavioural and magnetoencephalography effects of an L-theanine-based nutrient drink: a randomised, double-blind, placebo-controlled …

  DJ White, S De Klerk, W Woods, S Gondalia, C Noonan… - Nutrients, 2016 - mdpi.com

  … [26] also studied l-theanine and caffeine in isolation and … benefits to mood and general health, l-theanine is emerging as an … research, daily supplementation with 300–400 mg of PS over …

  2016180 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… - Sleep medicine …, 2025 - Elsevier

  … in the management of sleep disturbances; however, the lack of studies on “pure” L-theanine … of L-theanine supplementation for improving and maintaining sleep quality in healthy and …

  202535 citations

• The Top 5 Best Cheapest Pre Workouts

  F Loss - roborfitness.com

  … L-theanine, an amino acid that can come in handy to help balance the effects of caffeine. … First off on our list is the Nutricost Pre-Workout, a product that not only meets our required …

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2025-02-23. DSLD Label ID: 328480. 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.