Suntheanine L-thenanine

Suntheanine® 200 mg

The Original L-theanine

The original, most clinically researched L-theanine. Clinically proven to support calm, focus, and restful sleep without drowsiness. Backed by 50+ Suntheanine®-specific studies and 30+ years of trust for quality, consistency, and predictable results. Suntheanine® is produced through a patented enzymatic fermentation process that mirrors how L-theanine forms naturally, delivering a clinically meaningful dose with unmatched purity and fast-acting calm you can feel. If you've tried generic L-theanine, prepare for a real upgrade.
$25.00
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Within 30 days
QUALITY
QUALITY
Rigorously Tested
Benefits
  • Improves focus*
  • Reduces stress*
  • Improves sleep*
  • Calm & Focus in the first dose*
  • Achieve your state of calm focus without drowsiness*
  • Delivers a state of calm clarity in as little as 30 minutes*
  • 50+ Clinical Studies on Suntheanine®
Resources

What is Suntheanine?

Sharpen your mind, reduce stress and optimize sleep

All About Suntheanine

From the Experts

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Suggested Use: Take 1 capsule daily with water, or as directed by your healthcare practitioner.
Relevant for: Stress management, work, study, performance and everyday mental balance.

Recommendations: Adults, as a dietary supplement, take once or twice daily.

Supplement Facts
Serving Size: 1 Capsule Servings per Container: 60
Amount per Serving % Daily Value
Suntheanine® L-Theanine 200 mg †

†Daily Value not established

Other Ingredients: Vegetable Cellulose, Rice Extract.

Contains No: Artificial Sweeteners, Dairy, Wheat or Yeast.

Do not use if safety seal is broken or missing. Store in a cool, dry place.

KEEP OUT OF THE REACH OF CHILDREN.

Gluten Free Soy Free Non-GMO Vegan BPA Free Bottle

Suntheanine® is a trademark of Taiyo International, Inc.

Suntheanine L-thenanine
Supplements facts
Woman drinking water from a glass with a bottle of Suntheanine supplement on a bathroom counter.
Hand holding a bottle of Suntheanine supplement with a natural background
Woman with closed eyes in a blurred outdoor setting, featuring Suntineine branding and product claims.
Suntheanine® 200 mg
Suntheanine® 200 mg
Suntheanine® 200 mg
Man in a bathroom holding a Suntheanine supplement bottle and a glass of water.
Suntheanine L-thenanine

Suntheanine® 200 mg

$25.00
Why You’ll Love Suntheanine®?

Why You’ll Love Suntheanine®?

✓

Improves focus*

✓

Reduces stress*

✓

Improves sleep*

✓

Calm focus from your first dose*

✓

Feel focused without drowsiness*

✓

Delivers a state of calm clarity in as little as 30 minutes*

✓

50+ clinical studies on Suntheanine®

✓

Enzymatic fermentation purity

✓

The original nature inspired form of L-theanine

Certifications

Kosher Certified
Non GMO Project Verified

What Makes Suntheanine® Different ?

✓
The original L-theanine
✕
✓
Bio-identical, mirrors nature
✕
✓
Made by enzymatic fermentation
✕
✓
50+ clinical studies
✕
✓
FDA GRAS confirmed safety
✕
✓
Consistent, predictable results
✕
✓
Trusted worldwide for 30+ years
✕

How Suntheanine® Works

Suntheanine® L-theanine supports a calm, relaxed alertness by influencing the brain's natural alpha wave activity. This is the same brainwave pattern associated with deep focus and mental clarity.
01
Crosses the blood brain barrier efficiently*
02
Helps promote focus*
03
Improves cognitive performance when combined with caffeine*
04
Quickly feel the benefits after your first dose*
05
Promotes calm and clarity without grogginess*

For Moments
When It Matters Most

When pressure builds, you need to stay clear, composed, and in control.

  • Calm without losing clarity
  • Focus without overstimulation
  • Rest without sedation

What the Experts Say

Shawn Talbott

Shawn Talbott

PhDPsychonutritionistStress affects many areas of your life, from sleep to sports performance to energy levels. Suntheanine® helps you settle into a more positive cycle: sleeping better at night leads to more daytime energy which leads to more quality sleep and continued productive days.
Bryce Wylde

Bryce Wylde

B.Sc. Hons. (BioPsyc), DHMHSFunctional Medicine ExpertSuntheanine® replaces my 2 p.m. cup of coffee, giving me the power of coffee without the jitters. A calm, focused and alert attention is the type of energy we all desire: energy that makes us more efficient, not frazzled and distracted.
Michael R. Lyon

Michael R. Lyon

MDPhysician, medical researcher and authorI was in charge of a large double blind study where 200 mg Suntheanine® was consumed twice per day for 6 weeks in 8-12 years boys with ADD. No side effects were reported and I now view Suntheanine® as one of the safest natural products that can be given to a child.

Frequently Asked Questions

How fast does Suntheanine® 200mg work?

Most people feel noticeably calmer and report more focus with their very first dose, often within about 30 minutes.*

Can I take it with caffeine?

Yes, you can take Suntheanine® with caffeine to help smooth out jitteriness while at the same time supporting mental clarity.*

What makes it different from generic L-theanine?

Suntheanine® is clinically researched, patented, nature inspired, and produced via a patented pure enzymatic fermentation.*

Will it make me drowsy?

No. Suntheanine® supports calm and clarity without sedation.*

Is it safe for daily or long-term use?

Suntheanine® has been used safely in numerous clinical trials and is trusted by healthcare practitioners.*

Read All FAQs

Overall rating: 4.8333335 / 5 from 6 reviews.

AI Generated Review Summary

Summary topics

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Review highlights

Reviews

I just started Suntheanine L-Theanine

"I just started Suntheanine L-Theanine Tomorrows Nutrition and I must say I had noticed a difference in my over well being more relaxed. I take my time now and I’m not always rushing to finish things that can be done the next day. I’m hoping I can continue taking this long term every night. Not sure about the safety taking it long term, but for now it seems to be working."

— Anna R. (4/5)

Using as a sleep aid

"It’s been over a month since I started taking this to assist in sleeping, to aid in restlessness, calming my brain. I use along with Magnesium and it has been helpful in getting settled, and not waking up with 3 am. The 200mg was not effective so I started 400mg and coupled with Magnesium is the sweet spot for my sleep needs."

— Deborah B. (5/5)

Best sleep ever!

"I've taken other forms of L-theanine in the past, which were 100 mg and did not have noticeable sleep improvement. With Suntheanine and the Journey program, I was able to measure improvements in my sleep quality over a 30-day period and confirmed it works!"

— Mike D. (5/5)

Love the new 200 mg option!

"I've been a fan of the Tomorrow's Nutrition Suntheanine product, but am loving the new double strength 200 mg, especially for improving the quality of sleep."

— James S. (5/5)

"Works very well, definitely will be continuing to order!"

— John (5/5)

I have been able to sleep much better

"I find that when I take this product, I sleep much better throughout the night. I feel better in the morning too; it's been great."

— Carol (5/5)

Q&A

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