





Price: $40.00 - $26.52
(as of Nov 25, 2025 23:39:18 UTC – Details)
L-Theanine Supplement.
Package Dimensions : 5.04 x 3.9 x 2.87 inches; 0.01 ounces
Date First Available : December 17, 2024
Manufacturer : Distributed by Nutra Harmony LLC
ASIN : B0DQQBMP4R
Best Sellers Rank: #4,815 in Health & Household (See Top 100 in Health & Household) #1,781 in Blended Vitamin & Mineral Supplements
Customer Reviews: 4.6 4.6 out of 5 stars 1,306 ratings 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 — Don’t stress & do your best! Sleep well with l theanine 400mg! Provides calming & relaxing effect on the body, supports good sleep, and the ability to deal with stress.
Calm, Sleep & Relax — L theanine works by encouraging brain-wave activity, which improves concentration by reducing distractions and promoting a more focused state of mind
100% Natural Source — L Theanine effectively relaxes and relieves mental and physical tension. It has a natural ability to deal with nervousness and stress-related sleep problems. Found and made from the purest, highest quality green tea!
Made in the USA — L theanine from NUTRAHARMONY does not contain GMOs; it’s dairy-free, gluten-free, nut-free, wheat-free, soy-free, nightshade-free, and sugar-free. L-theanine is a perfect addition to your gluten-free & vegan lifestyle with advanced support and significant effects
Quality Matters — NUTRAHARMONY ltheanine vitamin is an excellent and effortless choice for improving your health. If you want to share your experience or have questions about l- theanine, message us. Our support team works 24/7. Maintain your health anytime, anywhere with a ltheanine supplement!
8 reviews for L Theanine 400 mg | L-Theanine Stress Relief | Extra Strength Supplement | Made in USA | Relaxation, Sleep & Calm Support | For Men & Women | Plant Based, Non-GMO & Gluten-Free | 240 Vegan Capsules
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$26.52

Katteryn –
Calming and Effective Without Making You Sleepy
The L-Theanine 400 mg worked really well for stress and tension. I felt calmer and more focused within about 30–40 minutes, but not drowsy at all. It’s great for staying relaxed during work or before bed. The capsules are easy to swallow and don’t upset the stomach. A solid extra-strength option if you want gentle, natural stress relief.
Laura Lynne Treehouse Wise Woman –
Looks like a high quality capsule.
The L. Theanine 400 mg, L-Theanine Stree Relief, Extra Strength Supplement, Made in USA are an easy size capsuleto swallow and I look forward to the benefits promised.
Renee D. –
Amazing for sleep support and calm
This supplement is amazing to addTo my nighttime routine . I sleep better on it and it doesn’t give me a headache likeMelatonin can in the morning .
Ibrm jim –
Good stuff
A good use of your money would be to buy this thing.Quality focus and jiterriness is nothing i saw also not sticky . Very effective . Health benefits im not sure.
samira –
Sleep better
It really works. I’m sleeping much better.
Larry G. Jones –
Great Product
Great Product
Jr –
Supposed to calm you
Price was reasonable and so far I am using the dr recommendations for dosage
melissa –
It’s not “Extra Strength”. Misleading!
I bought this because I usually have to take (2) 200mg capsules and I thought that this saying it was 400mg “Extra Strength “ that it would be convenient to only take one capsule instead. Wrong. It’s just slimey marketing. It’s the same exact 200mg capsules that I’m used to, which still works but it’s frustrating when your mislead.