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L-theanine dosage: serving size and directions

Use the Supplement Facts panel first. Serving size, active amount, and total intake from other supplements matter more than bottle-front claims.

Limited evidence Medium safety attention Experience: Early

Quick answer

L-Theanine lists 2 capsules as the serving context. Compare that with the active ingredient amount, daily total intake, and any condition or medication cautions that apply to you.

What to check next

Serving size: 2 capsules · Ingredient amount: L-Theanine · Total daily intake from all products

Label Check

Last checked
2026-07-29
Next check
2026-08-28
Label confidence
Structured Source Review

Shown fields

Brand, Product Name, Category, Dosage Form, Serving Size, Ingredient Links, Dose Or Active Amount, Source Url

Can change

Price Per Serving, Availability, Servings Per Container, Label Warnings, Testing Claims

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What to compare

Use the Supplement Facts panel first. Serving size, active amount, and total intake from other supplements matter more than bottle-front claims.

Product Context

L-Theanine is a L-Theanine product from Life Extension. Label context includes Vegetarian capsule, serving size 2 capsules, Price context: retailer price was not available at last check; retailer prices can change.

Safety and Uncertainty

  • Screen pregnancy, breastfeeding, medication use, and daytime drowsiness context.
  • Medication: Screen relevant medications before use.
  • Condition: Pregnancy, breastfeeding, chronic medical conditions, and unusual symptoms need professional guidance.
  • Allergy: Check active ingredient source, capsule, softgel, flavor, and excipient details.
  • Possible side effect: Digestive discomfort, drowsiness, or intolerance can occur depending on ingredient and user context.
  • Pregnancy/Breastfeeding: Ask a healthcare professional before use during pregnancy or breastfeeding.
  • Ingredient context: Screen pregnancy, breastfeeding, sedatives, blood pressure medication, and daytime sleepiness context.

Results and fit can vary. Check the label and safety notes before choosing.

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