DUEN LLC

Night Plus: Japanese Glycine and L Theanine Sleep Support

Experience restful sleep with this glycine and L theanine formula combining 5 synergistic amino acids. Japanese fermented GABA supports relaxation without next-day grogginess.

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Express: 4 - 7 days via EMS · Free from US$200

Standard: 10 - 14 days via ePacket Light · Free from US$60

$32.98 USD

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Synergistic Formula

5 key amino acids including L-Theanine, GABA, Glycine, L-Tryptophan, and Rafuma work together to support natural relaxation and sleep.

Simple Daily Routine

Take just 1 tablet daily with water, 30-60 minutes before bedtime. Easy to incorporate into your nighttime routine.

Quality Assured

Manufactured in a GMP-certified facility in Japan with 8 ingredient types, supervised by supplement specialists.

Japanese Fermentation Heritage

Features fermented GABA produced through traditional Japanese methods for enhanced bioavailability.

Best For

Those experiencing difficulty winding down, wanting to regulate daily rhythms, or seeking refreshed mornings without pharmaceutical dependency.

Market Trusted

Formulated with more ingredients (8 types) than typical competitors, developed with expert supervision by supplement specialists.

If you're experiencing difficulty winding down at the end of the day despite feeling tired

If you've been seeking to support your body's natural relaxation processes without synthetic sleep aids

If you're looking to wake up feeling more refreshed and energized rather than groggy

If you're a busy professional with a stressful lifestyle looking for natural relaxation support

If you want to establish a calming nighttime routine with a simple, one-capsule solution

If you're seeking a non-pharmaceutical approach to rest support backed by Japanese wellness tradition

If you feel unrested despite getting adequate sleep hours and want to improve sleep quality

If you're looking for comprehensive amino acid and botanical support in a single convenient supplement

1

Supports Natural Relaxation

L-Theanine, the calming compound found in green tea and matcha, promotes alpha brain waves associated with a calm, focused state. Combined with fermented Japanese GABA, Night Plus helps quiet mental activity without sedation.

Japanese fermented GABA

2

Promotes Quality Sleep

Glycine supports your body's natural temperature regulation for deeper sleep. L-Tryptophan serves as a precursor to serotonin and melatonin, supporting healthy sleep-wake cycles naturally.

Amino acid pathway support

3

Wake Refreshed & Alert

Unlike many sleep aids that leave you groggy, Night Plus works with your body's natural processes. Users report waking feeling refreshed and alert, ready to face each day with renewed energy.

No next-day grogginess

4

Comprehensive Formula

5 synergistic amino acids plus chamomile and milk protein create a balanced formula addressing multiple relaxation pathways, providing more comprehensive support than single-ingredient alternatives.

5 key amino acids

L-Theanine & GABA Relaxation Support

L-Theanine and GABA work together to promote relaxation by supporting the parasympathetic nervous system.

Key functions:

GABA functions as your brain's natural "calm down" signal
L-Theanine promotes alpha brain waves for calm focus
Japanese fermented GABA is more bioavailable than synthetic alternatives

Glycine Temperature Regulation

Glycine supports the body's natural temperature regulation processes associated with quality rest.

This amino acid helps your body prepare for sleep by supporting the natural cooling process that signals bedtime, contributing to deeper, more restorative sleep cycles.

Tryptophan Serotonin Pathway

L-Tryptophan serves as a precursor for serotonin, which converts to melatonin—your body's natural sleep hormone.

This essential amino acid must be obtained from food or supplements, and Night Plus provides it alongside complementary ingredients that support the conversion process.

Complete Ingredient Profile—Night Plus features 5 key amino acids: L-Theanine, L-Tryptophan, Rafuma, Glycine, and GABA. Contains 8 ingredient types versus competitors' 5-6 types.

Quality Manufacturing—Manufactured in a top-class domestic GMP-certified factory in Japan with thorough quality management from ingredient selection to shipping.

A Note on Evidence: We present research on ingredients, not specific product claims. Individual results may vary. This supplement is not intended to diagnose, treat, cure, or prevent any disease.

Ingredient Research Highlights

L-THEANINE

L-Theanine is an amino acid found in tea leaves studied for its calming effects. Research suggests it promotes alpha brain wave activity associated with relaxation without drowsiness.

Amino acid research in tea compounds

GABA (FERMENTED)

GABA functions as an inhibitory neurotransmitter. Japan pioneered fermented GABA production, creating a naturally-derived form that may be more bioavailable than synthetic alternatives.

Japanese fermentation research

GLYCINE

Glycine is a non-essential amino acid that plays multiple roles in the body. Studies indicate it may support sleep quality by helping regulate body temperature.

Sleep and amino acid metabolism research

The Story

About Brand Story

DUEN LLC

DUEN LLC — established in 2018 in Tokyo's Shibuya district — is an online-specialized health and beauty supplement company focused on making high-quality functional foods accessible and affordable. By eliminating traditional advertising, distribution, and packaging costs, DUEN delivers science-based "Foods with Function Claims" directly to consumers through e-commerce platforms like Amazon Japan, where they've earned top-seller status with a 30-day money-back guarantee.

All DUEN supplements are manufactured in GMP-certified Japanese factories, with popular products including the Body Fat Guard series for weight management, Blood Sugar Save for glycemic support, and Night Supplement for relaxation. Their philosophy emphasizes that lasting wellness comes from consistent daily habits.

品質

Quality Assurance

Manufactured in Japan's highest-class GMP-certified factory with thorough quality management from ingredient selection to shipping - no compromises in the production process.

配合

Formulation Excellence

Contains 8 ingredient types (more than typical competitors), supervised by supplement specialists who carefully selected each component for synergistic effect.

伝統

Japanese Tradition

Features fermented GABA produced through traditional Japanese methods pioneered in Japan, combining centuries of fermentation wisdom with modern supplement science.

Our Promise: We don't just import popular Japanese supplements - we investigate each product's formulation, manufacturing standards, and real-world reputation in Japan.

Night Plus earned its place in our collection because it represents the best of Japanese relaxation science with transparent, specialist-supervised formulation.

Japan's supplement industry operates under some of the world's strictest quality standards. Combined with a cultural dedication to craftsmanship and centuries of wellness traditions, Japanese supplements represent a level of quality that's difficult to find elsewhere.

Rigorous Quality Standards

Japanese regulations require comprehensive testing at every stage of production, with standards that often exceed international requirements.

GMP-Certified Manufacturing

All our products come from facilities that meet Japan's strict GMP (Good Manufacturing Practice) certification requirements.

Centuries of Tradition

Many Japanese supplements draw on ingredients and formulations refined over generations, combining ancient wisdom with modern science.

Transparent Sourcing

Japanese manufacturers maintain complete traceability, so you know exactly where every ingredient comes from.

Learn more

Take 1 tablet daily with water or lukewarm water, preferably 30-60 minutes before bedtime.

Swallow the capsule whole without chewing for optimal absorption.

For best results, take consistently at the same time each evening.

Tips for Best Results

Take at the same time each evening to establish a consistent routine
30-60 minutes before bedtime allows ingredients to begin working
Can be taken with a light snack if preferred
Store in a cool, dry place away from direct sunlight and humidity
Continue use for at least 2-4 weeks to experience full benefits
Do not exceed the recommended daily dosage of 1 capsule

L-Theanine

Calming Amino Acid

Found in green tea, promotes alpha brain waves for relaxation

GABA

Fermented Japanese

Natural relaxation support through traditional fermentation

Glycine

Temperature Support

Amino acid supporting body's natural sleep preparation

Ingredients: Rafuma extract powder (manufactured in Japan), Milk protein (contains milk ingredients), GABA (from barley lactic acid fermentation), Chamomile extract powder (Dextrin, Chamomile extract) / Cellulose, Gelatin, L-Theanine, Glycine, Calcium stearate, Fine silicon dioxide, L-Tryptophan.

Allergen Information: Contains: Milk, Gelatin. Does NOT contain: Eggs, wheat, peanuts, shrimp, crab, buckwheat, soy (major allergens).

Allergies

Not recommended for individuals with allergies to milk or gelatin products. Check the full ingredient list if you have sensitivities to any components.

Pregnancy & Nursing

Pregnant and nursing women should consult their healthcare provider before use.

Medications

If you are taking any medications, particularly sedatives or antidepressants, consult your physician before use. Show them the ingredient list.

Dosage

Do not exceed the recommended daily dosage of 1 tablet as excessive intake may cause digestive discomfort.

Discontinue Use

Discontinue use and consult a healthcare professional if any adverse reactions occur.

Disclaimer

This product is a dietary supplement and is not intended to diagnose, treat, cure, or prevent any disease. Not intended for children under 18.

Storage

Store in a cool, dry place away from direct sunlight, high temperatures, and humidity. Keep package sealed after opening. Keep out of reach of children.

Product Name

Night Plus: Japanese Glycine and L Theanine Sleep Support

Brand

DUEN LLC

Contents

30 tablets

Serving Size

1 tablet

Servings Per Container

30 servings (30-day supply)

Net Weight

9.42g (314mg per capsule)

Form

Gelatin capsule

Country of Origin

Japan

Manufacturing

GMP Certified Facility

Why Choose Japanese GABA Supplements?

Japan pioneered fermented GABA production, creating a form that's naturally derived and highly bioavailable. Unlike synthetic alternatives, Japanese fermented GABA is produced through a traditional fermentation process using beneficial bacteria—the same method used for centuries in Japanese wellness culture.

This natural approach has made Japan a global leader in relaxation science.

Can you take glycine and L theanine together?

Yes, glycine and L theanine work synergistically for relaxation support. Night Plus combines both amino acids along with GABA, L-Tryptophan, and Rafuma for comprehensive support.

These ingredients complement each other through different relaxation pathways—L-Theanine promotes alpha brain waves while Glycine supports temperature regulation for sleep.

What makes Japanese GABA different from other supplements?

Japanese GABA is produced through natural fermentation processes, making it more bioavailable than synthetic alternatives. Japan pioneered this fermentation technology, and Japanese GABA supplements are recognized worldwide for their quality and effectiveness.

What makes Night Plus different from other sleep supplements?

Night Plus combines five amino acids—L-Theanine, GABA, Glycine, L-Tryptophan, and Rafuma—with chamomile and milk protein for balanced relaxation.

Made in Japan, it supports calmness and restful sleep through complementary natural pathways without causing next-day grogginess.

Can I take Night Plus with GABA and theanine from matcha or green tea?

Night Plus already contains L-Theanine, the same calming compound found in matcha and green tea, plus fermented GABA. While drinking green tea during the day is fine, you don't need additional supplements when using Night Plus.

The formula is designed to provide optimal amounts of these ingredients.

Will Night Plus make me feel groggy or drowsy in the morning?

Night Plus promotes restful sleep without next-day grogginess. Its natural amino acids support your body's sleep rhythm, helping you wake refreshed and alert.

Take 30-60 minutes before bed for best results.

Is Night Plus safe for someone with dietary restrictions or sensitivities?

Night Plus contains milk protein and gelatin, so it isn't suitable for vegans or those with dairy allergies. It's free from major allergens including eggs, wheat, peanuts, and soy.

Lactose-intolerant users may tolerate it, but consult your doctor first.

How should I store Night Plus, and what is the shelf life?

Store Night Plus in a cool, dry place away from heat, sunlight, and humidity. Keep it sealed after use and avoid bathrooms.

Use within six months of opening and check expiration date printed on package before consuming.

What are the benefits of combining glycine and L theanine for sleep?

Combining glycine and L theanine provides multi-pathway sleep support. L-Theanine promotes relaxation through alpha brain wave activity, while glycine helps regulate body temperature—a key signal for sleep onset.

Together with GABA and L-Tryptophan in Night Plus, they create comprehensive support for natural, restful sleep.

How long does it take for Night Plus to work?

Many users notice improved relaxation within the first 1-2 weeks of consistent use. For best results, take Night Plus at the same time each evening, 30-60 minutes before bedtime.

Continue for at least 2-4 weeks to experience the full benefits of the synergistic amino acid formula.

Night Plus: Japanese Glycine and L Theanine Sleep Support