Home > Product > Capsules

L-Theanine capsules for Mood Relaxation & Stress Relief

L-Theanine capsules for Mood Relaxation & Stress Relief
L-Theanine capsules for Mood Relaxation & Stress Relief
L-Theanine capsules for Mood Relaxation & Stress Relief
  • L-Theanine capsules for Mood Relaxation & Stress Relief
  • L-Theanine capsules for Mood Relaxation & Stress Relief
  • L-Theanine capsules for Mood Relaxation & Stress Relief
  • L-Theanine capsules for Mood Relaxation & Stress Relief
  • L-Theanine capsules for Mood Relaxation & Stress Relief storehouse
  • L-Theanine capsules for Mood Relaxation & Stress Relief quality testing
  • L-Theanine capsules for Mood Relaxation & Stress Relief quality testing

Product Overview:

L-theanine is synthesized in the roots of tea plants and transported to the leaves through the branches and trunks, where it accumulates. Under sunlight, theanine is converted into catechins. Therefore, L-theanine is found in higher concentrations in high-grade green tea grown in shaded environments, while it is found in lower concentrations in ordinary coarse tea leaves, although polyphenol content is higher.

Efficacy: Health Care Supplement, Sleep Supplement

L-Theanine capsules for Mood Relaxation & Stress Relief Details

Product Name L-Theanine capsules | GMP certification | Reson
Appearance capsules
Specification 500mg/Cap,1000mg/Cap or as your request
Certification ISO,Halal,HACCP
Keywords L-Theanine capsules, L-Theanine for stress management and relaxation, Best L-Theanine for calm focus
Storage Keep in a cool, dry, dark location in a tightly sealed container or cylinder.
Shelf Life 24 Months

What is L-theanine?

L-theanine is an amino acid naturally found in tea (especially green tea) that has effects such as regulating mood, relieving stress, and improving cognitive function. It can help relax by promoting the release of alpha brain waves without affecting concentration, and may synergize with caffeine to enhance brain performance. It also has potential benefits such as regulating sleep and supporting the immune system.

Efficacy and Functions of L-Theanine

1. Nervous System Regulation and Stress Relief

L-Theanine can penetrate the blood-brain barrier and act directly on the central nervous system.

  • Promoting alpha wave release: Alpha waves are associated with a state of wakefulness and relaxation, which can reduce anxiety, relieve tension, and improve physiological responses to stress (such as increased heart rate).
  • Regulating neurotransmitters: Increasing levels of "happy hormones" such as dopamine and serotonin in the brain, inhibiting excessive glutamate excitation, and balancing mood.

2. Enhancing Cognitive Function and Concentration

L-Theanine often works synergistically with caffeine:

  • Reducing caffeine side effects: such as palpitations and anxiety, while prolonging the stimulating effect of caffeine.
  • Improving attention and reaction speed: Studies show that doses of 50-200mg can improve the ability to handle complex tasks, especially for people who use their brains for long periods of time.

3. Improving Sleep Quality

By regulating neurotransmitters (such as reducing glutamate activity and increasing GABA levels), L-Theanine can:

  • Shorten sleep onset time: Non-sedative sleep aid, avoiding drowsiness the next day.
  • Prolonged Deep Sleep Cycles:** Improves sleep structure, suitable for those with stress-related insomnia or light sleep.

4. Immune and Cardiovascular Health:

  • Immune Support: Activates natural killer cells (NK cells), enhancing immunity, especially effective during periods of fatigue or early infection.
  • Blood Pressure Regulation: Inhibits angiotensin-converting enzyme, aiding in vasodilation, potentially beneficial for those with prehypertension.
  • Antioxidant and Metabolic Effects: Reduces free radical damage, improves lipid metabolism, and lowers the risk of arteriosclerosis.
OEM Service
We offer OEM services, please contact us for more information>>
Product Type Capsules,Softgels,Tablets,Gummies,Liquid Drops,Gum,solid beverage and other customized products
Packaging Bottles, Bags, Bulk, Blister packs, Custom
Formulas Standard formulas or custom formulas
OEM service Support OEM&ODM Custom service,Different Formula,Flavors, Shapes,Bottle ,Color

Suitable Users and Precautions

  • Suitable Scenarios: Individuals experiencing high-pressure work/study, emotional fluctuations, prolonged concentration, or sleep disorders.
  • Safety: The common daily dose is 100-400mg. Overdose may cause headaches or gastrointestinal discomfort. Pregnant women, breastfeeding mothers, and those taking this medication long-term should consult a doctor.
  • Contraindications: Use with caution in patients with low blood pressure or autoimmune diseases. Avoid concurrent use with antihypertensive drugs or immunosuppressants.

Frequently Asked Questions

Q: Will L-Theanine make me sleepy?

  • A: No. It promotes "relaxed alertness." You will feel calm and composed, but you will remain completely awake and ready to handle tasks.
Q: How long does it take to kick in?
  • A: Most users feel a sense of calm and clarity within 30 to 45 minutes of ingestion.
Q: Can I take it every day?
  • A: Yes. L-Theanine is generally considered safe for daily use. Unlike many stimulants, you don’t build a tolerance to its calming effects, and there are no "withdrawal" symptoms.
 Hot Sale Products 
Sports Nutrition Supplement Creatine Monohydrate Powder BCAA Amino Acids Powder L-Camitine Capsules Creatine Gummies
Hair Nails and Skin Supplements Collagen + Vitamin C Tablets Biotin Capsules Hyaluronic Acid + Zinc Gummies Marine Collagen Dnnk
Slimming Supplement Apple Cider Vinegar Gummies Garcinia Cambogia capsules Fat buming tablets L-Camitine Liquid
Memory Brain Supplement Ginkgo Biloba Capsules Omega-3 Fish Oil Softgels L-Theanine Capsules Lion's Mane Mushroom Capsules
Sleep Supplement Melatonin Tablets Magnesium L-Theanine Gummies Ashwagandha Capsules Melatonin gummies
Health Care Supplement Multivitamin Tablets Probiotics Capsules Vitamin D3 + K2 Softgels coenzyme Q10 Capsules 
Gummy & Gummies Vitamin C Gummies Apple Cider Vinegar Gummies Hair, Skin & Nails Gummies Sleep Gummies
Drops & Drink Vitamin D3 Drops Multivitamin B Drops Collagen Drink  Vitamin C Drink 
Effervescent Tablets Vitamin C Effervescent Tablets Electrolyte Hydration Tablets Multivitamin Effervescent Tablets

Magnesium Effervescent Tablets

Click here to get a product quote.

Капсулы L-теанина для улучшения настроения и снятия стресса
Gélules de L-Théanine pour la relaxation et la réduction du stress
L-Theanin Kapseln zur Stimmungsaufhellung & Stresslinderung
Cápsulas de L-Teanina para la relajación del estado de ánimo y el alivio del estrés
Cápsulas de L-Teanina para Relaxamento do Humor e Alívio do Estresse

our brand

OWN Brand

Intergroup is supplying OEM service for the Well-known brands Reson and Ausreson. Alibaba International Station No.1 supplier, Alibaba International Station Number 1, Alibaba International Station Number one Customized logo is welcome, Packing as your requirement. offering private label

custom

Cusrom Process

01 Contact us 02 Confirm Product Formula 03 Sample Confirmation 04 Deposit Payment 05 Factory Production 06 Product Quallty Inspectlon 07 Balance Payment 08 Dispatch and Delvery

factory

exhibition

Factory & Exhibition

Private Label design, fast delivery, USA Warehouse, European Warehouse, capsules factory,Softgels factory,tablets factory, pills factory, Gummies factory, Liquid Drops factory,Gum factory,solid beverage factory, customized factory, capsules manufacturer, Softgels manufacturer, tablets manufacturer, pills manufacturer, Gummies manufacturer, Liquid Drops manufacturer,Gum manufacturer,solid beverage manufacturer.

In order to better serve our global customers, we will participate in various large-scale exhibitions.Europe, North America

Certifications

Certifications

We are a nutritional supplement raw material and nutritional supplement brand OEM manufacturing factory in China with ISO 22000, ISO 9001, HACCP Management certifications, GMP certificate the factory, HALAL, CE, CE-ROHS, Organic, KOSHER, NSF Product certifications.Our product's comprehensive certification standards.

package

Packaging

We promise to provide high-quality products, but please raise any quality issues within 15 days of receiving the package.

From concept to finished product, we are committed to quality, efficiency, and customer satisfaction. Let us help you bring your product to life!

why

FAQs

Q: What kind of OEM forms can you supply ?
A: Pre mix powder, Capsules, Tablets, pills, Softgel,drops, Gummy.

Q: What's the pill size?
A: Capsule: 2#,1#,0#, 00#. Tablet: Can customize like 500mg, 1000mg, 1500mg, 2000mg

Q: What are capsule shells made of ?
A: Gelatin,HPMC (Vegan), Enteric gelatin & enteric vegan shells.

Q: Can the formula be customized by our Own Formula?
A: Yes, The formula can be exact customized.

Q: Minimum Order Quantity (MOQ) ?
A: Small quantity sample can be customized according to your requirements. Official order MOQ: 100,000 pieces

Q: Can you supply bottles with private label?
A: Yes, all can be customized.

Q: What kind of certificates can you supply for your OEM capsules / Tablets?
A: Health certificate, Original certificate.

Back Home

Inquire This Product

©2026 Xi'an ECO Biotech Factory Co., Ltd.