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Swanson Ultra

Suntheanine L-Theanine

Swanson $6.99
Retail $13.99
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Veg Caps Size:
1, Pill Size Guide
100 mg 60 Veg Caps

"I found this to help with stress and was effective right away. ... Made me feel much calmer and helped improve my mood. Worked better than Sam-e. I would definitely recommend it." ~product review by flkid

  • Suntheanine L-Theanine works gently and naturally to promote relaxation without drowsiness

  • Enhances endocrine function, stimulating some brain waves and leaving others unaffected

  • A unique amino acid derived from green tea leaves

Get the most out of your life by de-stressing naturally with L-theanine! This unique amino acid has been extensively researched and shown to promote relaxation without causing drowsiness. It works by enhancing endocrine function, stimulating specific brain waves without inhibiting others. Swanson Ultra, featuring patented SunTheanine, offers a safe and effective alternative to help you keep up the pace with a smile on your face!

Product Label

Supplement Facts

Serving Size 1 Veggie Capsule

  Amount Per Serving % Daily Value
Suntheanine® L-Theanine 100 mg *

*Daily Value not established.

Other ingredients: Brown rice flour, hypromellose (vegetable capsule), magnesium stearate.

Suggested Use: As a dietary supplement, take one veggie capsule one to two times per day with water before meals.

Suntheanine® is a registered trademark of Taiyo International, Inc.

Terms and Ingredient Definitions

Swanson Ultra Suntheanine L-Theanine Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

Suntheanine L-Theanine 4.8 5 102 114
Love this Calms my nerves without making me tired March 22, 2014
Wife finds it helpful My wife has used theanine for awhile. Says it helps her focus. I'd say that's so. February 19, 2014
It works. I found this to help with stress and was effective right away. I would take one or two in the am. I would also take one during the day if I felt stressed and it helped. Made me feel much calmer and helped improve my mood. Worked better than Sam-e. I would definitely recommend it. February 8, 2014
Sleep Aid I take Suntheanine every night for a good, restful sleep. January 22, 2014
Perfect chill pill This really helps me during stressful times, immediately after a workout, or falling back to sleep in the middle of the night. My one wish would be that Swanson start to offer larger sizes of this and other products at a discount. November 27, 2013
love this supplement I use this to calm my mind & it really helps. I usually take this at bedtime.Great product.I haven't tried any other products because this one works for me. November 4, 2013
Helps Me with Stress This product really helps to change my mood when I am stressed. It also helped my niece during an extremely rough time in her life. October 26, 2013
not bad..but Having used GABA for a few years and developing a little resistance to it, I thought I would temporarily switch to this for stress. This has more of a groggy side effect in the beginning but it went away. The GABA seems to be a "cleaner" product for me and my brain, but this is a decent alternative. GABA is a 5 leaf this is a 4 leaf. October 20, 2013
Exceptional One of the best products on the market today and at an exceptional value. September 28, 2013
Relaxation I am not a naturally relaxed individual and this product has helped a lot in that regard. I will continue to buy this along with so many other products I regularly buy from Swanson. September 12, 2013
didn't wear off... This product didn't wear off the next day as I had hoped it would. I felt groggy, draggy and bad. Wouldn't take again. August 7, 2013
Oh Let the Sun shine in.... ......this product has helped me face every day with a grin! C: August 1, 2013
Top quality!!! I definitely got a bit moody after menopause. In the past 5 years I have tried all the mood-enhancing supplements. I started with 5-HTP since it is a top serotonin precursor, but it had zero positive effects. In all my trail runs with other mood supplements--such as St John's Wort, Sam-e, GABA, etc.-- Suntheaniane L-Theanine is the ONLY one that has made a truly noticeable positive difference. We all have different brain chemistries so I cannot say you will have the same effects, but it works beautifully for me. Also, I have found no higher quality Suntheanine from even the most highly touted $$$ brands. Swanson's wins again!!! July 23, 2013
Best product out there I have been using Suntheanine for quite some time now. It helps take some of the stress out of the day. I am able to stop and get a grip on the situation. I have recommended this product to friends and family. I purchase all of my herbs/supplements exclusively from Swanson's and have not been disappointed yet. July 20, 2013
Great product works well. Does what it claims July 12, 2013
Very good Product L-Theanine is a wonderful product and helps to relax me for a good nights sleep. June 26, 2013
Theanine helps me! I have been taking L-Theanine for a long time ~ usually twice a day. It calms my nervous system. I notice when I do not take it! My body and my mental stability are glad I have found Theanine! It has helped me through some challenging times. :) June 19, 2013
Excellent product! It definitely does help to keep me calmer overall. I take one twice a day, in the morning and late afternoon. Doesn't make me drowsy but keeps the edge off. I find I feel less stressed since taking this. May 25, 2013
An item I always purchase I have recommended L-Theanine for years. It was recommended to me by an MD. It helps to calm and relieve stress by taking "the edge" off thinking that is spinning too fast. Just a month ago I saw that Dr. Amen was in favor of it (he suggests 400 mg) a day. The Swanson brand is the best value for the cost. May 3, 2013
L-theanine this product helps me relax, i take it at nite, before bed May 3, 2013
Stress reliever Used widely in Japan, this amino acid is free of caffeine and calms the alpha brain waves to help deal with stress. It also aids sleep patterns. May 1, 2013
Didn't quite cut it I didn't get the noticeable relaxation response that the others here evidently got. This brand is good, no bad reaction and can't compare it to others. It's probably an individual reaction and perhaps other brands would work better for me, though I'm not going to try them out just now. April 30, 2013
Wonderful and calming I wouldn't be without Suntheanine. It promotes relaxation without drowsiness. It is the ONLY form of L-theanine that has a patent (Taiyo). All other forms of L-theanine are not nearly as good as this. In addition to promoting calm relaxation, it also mitigates the effect of caffeine 'jitters.' If you're not familiar with SunTheanine, by all means treat yourself to a bottle. It's magic. April 24, 2013
great product really helps to reduce stress. l would totally recommend it to others. April 23, 2013
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