





At Doctor’s Best, we understand that stress can be an unwelcome guest. That is why our specialized formula features a pure form of L-theanine that is renowned for promoting relaxation, managing stress, and sharpening focus for a more balanced state of mind.*
Product Dimensions : 2.13 x 2.13 x 3.69 inches; 2.12 ounces
Item model number : DRB-00197
Department : Health and Beauty>Health and Wellness
Date First Available : September 1, 2009
Manufacturer : Doctor’s Best
ASIN : B001OXTGVG
Best Sellers Rank: #12,253 in Health & Household (See Top 100 in Health & Household) #6 in 5-HTP Nutritional Supplements #1,170 in Sales & Deals
Customer Reviews: 4.6 4.6 out of 5 stars (2,502) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
L-THEANINE SUPPLEMENT: Each capsule provides 150 mg of Suntheanine, a pure form of L-theanine (the amino acid found in green tea). It is known for its supportive role in relaxation & mental clarity
TENSION & STRESS SUPPORT: L-theanine helps encourage a relaxed state without drowsiness, supporting a sense of calm during everyday stress while still allowing for alertness and focus
PROMOTES FOCUS: This supplement supports cognitive performance by promoting attention and mental sharpness, beneficial for work, study, or other focus-driven activities
150 MG VEGGIE CAPS: Doctor’s Best L-Theanine comes in convenient, easy-to-swallow veggie capsules. This formula is Non-GMO, gluten free, soy free, and vegan-friendly, fitting a variety of lifestyles
DOCTOR’S BEST: Good nutrition starts with sound science. For over 35 years, we have been dedicated to providing only thoroughly researched, rigorously tested, and clinically-approved supplements
Show all
Most Helpful
Highest Rating
Lowest Rating

Modgal5864 –
Missy –
J.Adams –
Bcdefg123 –
Rosemarie Hill –
Rancho Blondie –
Kostiantyn Valikhov –
dgrayman13 –
AHMED ALHAMELI –
A S –