Show sidebar
Filters
-4%
Doctor’s Best L-Theanine in bd
Quick view
Add to wishlist

Doctor’s Best L-Theanine

SKU: 382782743827-1-1
Original price was: 2,900.00৳ .Current price is: 2,780.00৳ .
Add to cart
Now L-Theanine (200 mg) in bd
Quick view
Add to wishlist

Now L-Theanine (200 mg)

NOW Foods
SKU: 09876543234509
2,950.00৳ 
Add to cart

πŸ§˜β€β™‚οΈ L-Theanine Supplements in Bangladesh: Natural Calm for Mind, Mood & Sleep

L-Theanine, a bioactive amino acid present in green tea, is now available as a supplement in Bangladesh. Scientific research indicates that L-Theanine may support focus, reduce stress, improve sleep quality, and enhance cognitive function through natural mechanisms.

🌿 What is L-Theanine?

L-Theanine is a naturally occurring non-protein amino acid predominantly found in green tea (Camellia sinensis). Unlike amino acids involved in muscle synthesis, L-Theanine primarily influences neurological processes and promotes relaxation without causing drowsiness.
βœ… Scientific Classification:
  • Chemical name: Ξ³-glutamylethylamide
  • Category: Psychoactive dietary amino acid
  • Primary Actions: Increases alpha brain waves, enhances GABA, serotonin, and dopamine activity

πŸ’š Benefits of L-Theanine Supplements

L-Theanine provides a safe, non-habit-forming option for individuals seeking to manage stress, improve focus, or enhance sleep, as supported by clinical research.

βœ… 1. Reduces Stress & Anxiety

L-Theanine promotes relaxation without sedation by modulating neurotransmitters such as:
  • GABA, which acts as a natural buffer against anxiety
  • Dopamine, which contributes to mood regulation
  • Serotonin – emotional stability
A 2020 meta-review reported that daily doses of 200–400 mg of L-Theanine significantly reduced symptoms of stress and anxiety.
Source

βœ… 2. Enhances Sleep Quality

L-Theanine improves:
  • Sleep latency (falling asleep faster)
  • Sleep efficiency (less waking at night)
  • Daytime alertness, without residual drowsiness
πŸ’€ A 4-week clinical study showed that 200 mg/day improved sleep duration and quality.
Source

βœ… 3. Improves Focus, Attention & Memory

L-Theanine supplementation may benefit students, professionals, and individuals seeking cognitive enhancement by improving:
  • Alpha brainwave activity
  • Reaction time & working memory
  • Mental clarity during stress
🎯 A 100.6 mg dose improved attention in older adults within 1 hour.
Source

βœ… 4. Supports Mental Health & Mood Balance

L-Theanine has demonstrated potential in:
  • Reducing depressive symptoms
  • Balancing mood in stress-prone individuals
  • Complementing mental health therapies
A study administering 250 mg per day for eight weeks reported significant improvements in depression and anxiety scores.
Source

βœ… 5. Boosts Immune System

  • Enhancing T-cell immune response
  • Reduces upper respiratory infections
  • Supports immune resilience during stress
L-Theanine has been shown to improve immune response in individuals exposed to viral and bacterial pathogens.
Source

πŸ“¦ L-Theanine Supplements in Bangladesh

As awareness of natural approaches to mental health and sleep increases, L-Theanine supplements are now available in Bangladesh in multiple formulations.

πŸ›οΈ Where to Buy:

Platform
Options
Notes
Daraz Bangladesh
 L-Theanine capsules/powder Verify seller reputation
E-Pharma Stores
 Branded formulations Check for authenticity
Health Shops (Dhaka, Chattogram)
 ON, Now Foods, Doctor’s Best Imported brands
Facebook Groups
 Nootropic/Supplement groups Watch for fake/counterfeit products

πŸ’° Price Range in Bangladesh

Brand
Country
Form
Price (BDT)
Doctor’s Best USA Capsules ৳1,800–৳2,400
NOW Foods USA Capsules ৳2,200–৳2,800
Jarrow Formulas USA Capsules ৳2,100–৳2,700
Nutricost USA Powder ৳2,500–৳3,200

πŸ§ͺ Recommended Dosage of L-Theanine

Goal
Dosage (mg/day)
Timing
Stress & Anxiety 200–400 mg AM or PM (split dose)
Sleep Improvement 200 mg 30–60 min before bed
Focus & Cognitive Boost 100–200 mg Morning or before tasks
It is recommended to begin with the lowest effective dose. Intake should not exceed 600 mg per day without medical supervision.

πŸ’Š Forms of L-Theanine Supplements

Form
Benefits
Capsules
 Easy to dose, travel-friendly
Powder
 Flexible dosing, budget-friendly
Blends
 Often paired with caffeine or magnesium
Sublingual
 Fast-acting, bypasses digestion
The combination of L-Theanine and caffeine is widely used to promote sustained energy and focused attention.

⚠️ Safety, Side Effects & Interactions

βœ… Safe For Most People

L-Theanine is non-toxic and non-sedating, even at doses up to 900 mg per day in clinical trials.

❌ Who Should Be Cautious:

  • Pregnant or breastfeeding women (lack of data)
  • People with hypotension (can have slightly lower BP)
  • Those on sedatives or blood pressure medication
  • D-Theanine, a synthetic form, should be avoided due to its lower bioavailability.

🧠 Possible Side Effects (rare, mild):

  • Headache
  • Drowsiness
  • Nausea (high doses)
  • Lower blood pressure

πŸ₯¦ Natural Sources of L-Theanine

Food/Drink
L-Theanine Content (mg) per cup
Green tea 8–30 mg
Black tea 5–20 mg
Oolong tea 7–25 mg
White tea 6–12 mg
πŸ” Tea + L-Theanine supplement = double benefit, but monitor caffeine intake.

❓ FAQ: L-Theanine in Bangladesh

πŸ’¬ Is L-Theanine legal in Bangladesh?

Yes. It’s sold as a dietary supplement and available both online and in health stores.

πŸ’¬ Can I take it with antidepressants?

Speak to your doctor. L-Theanine may have additive effects on serotonin and dopamine.

πŸ’¬ Is it addictive?

No. L-Theanine is non-habit forming and does not cause withdrawal symptoms.

πŸ’¬ Can I take it with caffeine?

Yes! In fact, L-Theanine + Caffeine is one of the most researched nootropic stacks.

πŸ“š References

  1. Li et al. (2022). L-Theanine: A functional amino acid in tea. Frontiers in Nutrition.
  2. Williams et al. (2020). L-Theanine and anxiety management. Plant Foods Hum Nutr.
  3. Wang et al. (2022). How L-theanine buffers stress. Food Sci Hum Wellness.
  4. Nuss (2015). GABA & anxiety disorders. Neuropsychiatr Dis Treat.
  5. Hidese et al. (2019). L-Theanine for stress & cognition. Nutrients.
  6. Deb et al. (2019). L-theanine’s neuroprotective potential. Neurochem Int.
  7. Imafuku et al. (2023). Effects on sleep quality. Nutrients.
  8. Hidese et al. (2017). Depression and mood modulation. Acta Neuropsychiatr.