---
product_id: 537160356
title: "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 | 120 Vegan Capsules"
brand: "nutraharmony"
price: "€ 37.25"
currency: EUR
in_stock: true
reviews_count: 8
category: "Nutraharmony"
url: https://www.desertcart.sk/products/537160356-l-theanine-400-mg-l-theanine-stress-relief-extra-strength
store_origin: SK
region: Slovakia
---

# 100% plant-based purity 400mg potent dose Made in USA quality 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 | 120 Vegan Capsules

**Brand:** nutraharmony
**Price:** € 37.25
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your calm, conquer your day — naturally.

## Quick Answers

- **What is this?** 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 | 120 Vegan Capsules by nutraharmony
- **How much does it cost?** € 37.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/537160356-l-theanine-400-mg-l-theanine-stress-relief-extra-strength)

## Best For

- nutraharmony enthusiasts

## Why This Product

- Trusted nutraharmony brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Pure Plant Power:** Crafted from premium green tea extract, vegan, non-GMO, and gluten-free for clean wellness.
- • **Sleep Like a CEO:** Supports deep, uninterrupted sleep so you wake up refreshed and ready to lead.
- • **Allergy-Friendly Formula:** Free from gluten, dairy, soy, nuts, and caffeine—perfect for sensitive lifestyles.
- • **Trusted American Quality:** Made in the USA with rigorous standards and 24/7 customer support for peace of mind.
- • **Calm Your Mind, Own Your Day:** 400mg L-Theanine delivers powerful stress relief and mental clarity.

## Overview

NUTRAHARMONY L-Theanine 400mg is a premium, extra-strength supplement designed to promote relaxation, reduce stress, and enhance sleep quality. Made in the USA from pure green tea extract, it is vegan, non-GMO, gluten-free, and free from common allergens. With 120 capsules per bottle, it offers a convenient, natural solution for busy professionals seeking mental clarity and restful nights.

## Description

desertcart.com: 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 | 120 Vegan Capsules : Health & Household

Review: Useful supplement with a good price - I like this supplement for helping me remain calm. It has health benefits and the quality is good. The price is also reasonable.
Review: It actually works ✅ - I have ADHD and it's very hard for me to settle my mind down to go to sleep. Also, I have sleep apnea.. When I say I take it an hour before bed and don't wake up. What a blessing 🙏🏽 Before taking this. I use to toss and turn all night. Also. I would wake up easily to any sound. All of that went out of the window taking this. I take two one hour before bed .. and sleep 8 hours.. I have bought this 6 times and I am going to keep refilling my order

## Features

- 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!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C9N1Q5QS |
| Age Range Description | Adult |
| Allergen Information | Gluten Free |
| Best Sellers Rank | #5,679 in Health & Household ( See Top 100 in Health & Household ) #68 in Herbal & Nutritional Sleep Supplements |
| Brand | NUTRAHARMONY |
| Brand Name | NUTRAHARMONY |
| Container Type | Bottle |
| Customer Reviews | 4.6 out of 5 stars 1,543 Reviews |
| Diet Type | Vegan |
| Dosage Form | Capsule |
| Flavor | Unflavored |
| Item Form | Capsule |
| Item Weight | 400 Milligrams |
| Manufacturer | Distributed by Nutra Harmony LLC |
| Material Features | Dairy Free |
| Material Type Free | Caffeine Free |
| Model Name | NH-LTHEANINECPS120 |
| Number of Items | 1 |
| Primary Supplement Type | L-Theanine |
| Product Benefits | Sleep Support |
| Special Ingredients | L-Theanine |
| Supplement Formulation | Individual Supplement |
| Total Servings Per Container | 60 |
| UPC | 850053814006 |
| Unit Count | 120.00 Count |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** NUTRAHARMONY
- **Diet Type:** Vegan
- **Flavor:** Unflavored
- **Item Form:** Capsule
- **Item Weight:** 400 Milligrams
- **Primary Supplement Type:** L-Theanine
- **Product Benefits:** Sleep Support
- **Special Ingredients:** L-Theanine
- **Unit Count:** 120.00 Count

## Images

![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 | 120 Vegan Capsules - Image 1](https://m.media-amazon.com/images/I/71C+sNy7HHL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Useful supplement with a good price
*by T***A on December 26, 2025*

I like this supplement for helping me remain calm. It has health benefits and the quality is good. The price is also reasonable.

### ⭐⭐⭐⭐⭐ It actually works ✅
*by C***N on December 24, 2025*

I have ADHD and it's very hard for me to settle my mind down to go to sleep. Also, I have sleep apnea.. When I say I take it an hour before bed and don't wake up. What a blessing 🙏🏽 Before taking this. I use to toss and turn all night. Also. I would wake up easily to any sound. All of that went out of the window taking this. I take two one hour before bed .. and sleep 8 hours.. I have bought this 6 times and I am going to keep refilling my order

### ⭐⭐⭐⭐⭐ Calming and Effective Without Making You Sleepy
*by K***N on November 15, 2025*

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.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.sk/products/537160356-l-theanine-400-mg-l-theanine-stress-relief-extra-strength](https://www.desertcart.sk/products/537160356-l-theanine-400-mg-l-theanine-stress-relief-extra-strength)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-28*