Overall Rating 4.708 out of 5 4.7 out of 5
Quality 4.875 out of 5 4.9 out of 5
Value 4.826 out of 5 4.8 out of 5
Effectiveness 4.609 out of 5 4.6 out of 5
Convenience 4.826 out of 5 4.8 out of 5
Satisfaction 4.783 out of 5 4.8 out of 5
23 of 24 (96%) customers would recommend this product to a friend.

Overall Rating 4.708 out of 5 4.7 out of 5
Quality 4.875 out of 5 4.9 out of 5
Value 4.826 out of 5 4.8 out of 5
Effectiveness 4.609 out of 5 4.6 out of 5
Convenience 4.826 out of 5 4.8 out of 5
Satisfaction 4.783 out of 5 4.8 out of 5
23 of 24 (96%) customers would recommend this product to a friend.

Product Reviews  
Overall: 4 out of 5 4 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 4 out of 5 4 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: seanmjj
Location: Seattle
Gender: Male
Top 25 Contributor Top 25 Contributor
Title: Green Tea Alternative Date: June 20, 2010
"This has the same substance as green tea so a great alternative. I don't take this everyday but I always find it is good idea when I need to stay calm and relaxed."
Overall: 4 out of 5 4 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 4 out of 5 4 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 4 out of 5 4 out of 5
Reviewed by: Humanitarian
Location: Reno, NV
Gender: Female
My Generation: Baby Boomer Generation (between 1946 and 1964)
I shop for dietary supplements: Once every 1 to 3 months
Shopping style: I depend upon a company's thorough educational content before I buy.
I've been using dietary supplements for: My entire life
Top 10 Contributor Top 10 Contributor
Title: Not Quite Sure What I Expected Date: May 6, 2010
"This product MAY be working, but it's difficult to tell for sure.

I have been taking two per day - once in the morning before breakfast and one before dinner. It's very subtle. I haven't tried taking two at a time. Perhaps if I did I'd notice something more profound. I'm only 120 pounds, so it should be enough. At least it won't knock you out or make you groggy."
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: secretary
Location: Idaho
Gender: Female
My Generation: Swing Generation (between 1933 and 1945)
I shop for dietary supplements: Multiple times during a month
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: My entire life
Title: a lifesaver Date: February 17, 2010
"I was taking Melatonin as a sleep aid, but it was not doing the job very well. When I added this product, it made all the difference. I sleep better, wake more alert and ready for my day. I wouldn't ever want to be without it."
3 of 3 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: grizzly
Location: Des Moines
Gender: Male
My Generation: Baby Boomer Generation (between 1946 and 1964)
I shop for dietary supplements: Once every 1 to 3 months
Shopping style: I'm motivated by a company's sales, promotions and overall personality.
I've been using dietary supplements for: More than five years
Date: January 21, 2010
"I am very satisfied with this amino acid product.

I received the results that were anticipated."
1 of 1 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: jgrenier
Location: Tallahassee, FL
Gender: Female
My Generation: Baby Boomer Generation (between 1946 and 1964)
I shop for dietary supplements: Once every 1 to 3 months
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: More than five years
Top 1000 Contributor Top 1000 Contributor
Title: I'd Recommend this Product Date: January 11, 2010
"I have enjoyed the benefits of this product and the convenience of taking only 2 small capsules a day. It is calming without making me sleepy."
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 4 out of 5 4 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: kgirl

Gender: Female
My Generation: Millennial Generation (after 1976)
I shop for dietary supplements: Multiple times during a month
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: My entire life
Top 500 Contributor Top 500 Contributor
Title: Wouldn't leave home without it! Date: December 11, 2009
"I couldn't say enough about L-Theanine! It definitely takes the edge off and calms me when I need to be in social situations. I wouldn't leave home without it! It's very convenient to have in my purse and I know that it will work quickly. I will purchase this product again once my bottle runs out!"
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 4 out of 5 4 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: jspin
Location: Chicago, IL
Gender: Male
My Generation: Baby Boomer Generation (between 1946 and 1964)
I shop for dietary supplements: Multiple times during a month
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: More than five years
Title: One of my favorites Date: November 11, 2009
"A friend recommended L-Theanine to me, and I've been pleased with it. It's a good value, as are other Swanson products.

I've always found Swanson's service to be very good. Products are delivered quickly and accurately. I've been a satisfied customer for years."
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: sj01
Location: Florida
Gender: Female
My Generation: Millennial Generation (after 1976)
I shop for dietary supplements: Once every 1 to 3 months
I've been using dietary supplements for: One to five years
Top 250 Contributor Top 250 Contributor
Title: The tea factor Date: October 7, 2009
"As a frequent tea drinker I don't wig out about much. Call me biased, but I am convinced this supplement has helped my husband contain his temper. Since taking this, he has been much better at staying calm and cool durring aggravating moments. If I had known I could have slipped this into his cereal long ago! I recently noted that Lipton has added (on their box) that their tea has 10 mg (?) of theanine plus antioxidants. I recommend this supplemnt not only because no one (not even me)drinks 10 cups of tea a day, nor do they do it religiously. Plus- it's and effective product for stress. Why not? and who doesn't have stress in their life? As always DYODD."
1 of 1 people found this review helpful.
Overall: 2 out of 5 2 out of 5
Quality: 4 out of 5 4 out of 5
Value: 3 out of 5 3 out of 5
Effectiveness: 2 out of 5 2 out of 5
Convenience: 4 out of 5 4 out of 5
Satisfaction: 3 out of 5 3 out of 5
Reviewed by: jemfan
Location: Binghamton, NY
Gender: Female
My Generation: Generation X (between 1965 and 1976)
I shop for dietary supplements: Once every 3 to 6 months
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: One to five years
Title: Didn't Notice Any Difference Date: August 23, 2009
"I had purchased this product for stress relief for myself and for relief from essential tremor for my mother. Neither of us noticed much of a difference from using this product."
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: RickM
Location: NC
Gender: Male
My Generation: Millennial Generation (after 1976)
I shop for dietary supplements: Once every 3 to 6 months
Shopping style: I'm mainly concerned about the company's policies and guarantees.
I've been using dietary supplements for: Less than one year
Top 500 Contributor Top 500 Contributor
Title: Not much until you need it Date: August 18, 2009
"I feel pretty much the same as always on a regular day after taking Theanine. However, on a stressful day it is amazing. If I had taken it before the stress it was not as severe. If I took it after the stress it reeled it in. I love Theanine."
1 of 1 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 4 out of 5 4 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: baa924
Location: Ohio
Gender: Female
My Generation: Swing Generation (between 1933 and 1945)
I shop for dietary supplements: Multiple times during a month
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: My entire life
Top 1000 Contributor Top 1000 Contributor
Date: August 10, 2009
"L-theanine is just one of many Swanson products I have used for years.I find the prices and quality are always some of the things I can always depend on.I also like the fact that I can count on delivery within 3 or 4 days."
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: avaness
Location: NY
Gender: Male
My Generation: Baby Boomer Generation (between 1946 and 1964)
I shop for dietary supplements: Once every 1 to 3 months
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: One to five years
Title: Suntheanine is great.... Date: August 5, 2009
"As a long time user of 5-HTP, i recently discovered Suntheanine and as an addition to my regimen I am very pleased. I've scoured the web to find information and this product fits the bill on purity quality and price!"
1 of 1 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 4 out of 5 4 out of 5
Value: 4 out of 5 4 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 4 out of 5 4 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: OndraCzechRepublic

Title: great helper Date: July 22, 2009
"I am very satisfied with this product, its a great help for good sleeping and relaxing after "hard day"!"
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: Renny
Location: Wisconsin
Gender: Female
I shop for dietary supplements: Once every 1 to 3 months
Shopping style: I depend upon a company's thorough educational content before I buy.
Title: Calming Date: July 22, 2009
"I have found this product to be very effective. Keeps me calm when I drive in heavy traffic & when my husband drives, keeps me from back seat driving (keeps my mouth shut)! I have found it useful in helping me get to sleep. Have used it for many years."
1 of 1 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: asdf
Location: OH
Gender: Female
My Generation: Baby Boomer Generation (between 1946 and 1964)
I shop for dietary supplements: Once every 1 to 3 months
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: More than five years
Title: magnesium stearate free! Date: July 12, 2009
"Not only does this product calm without putting me to sleep, lifting my mood, but unlike most does not contain magesium stearate, which is a huge plus- Thanks!"
1 of 1 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: shorthair
Location: Omaha
Gender: Female
My Generation: Baby Boomer Generation (between 1946 and 1964)
I shop for dietary supplements: Multiple times during a month
Shopping style: I'm motivated by a company's sales, promotions and overall personality.
I've been using dietary supplements for: My entire life
Top 1000 Contributor Top 1000 Contributor
Title: Worked in a couple of days Date: April 15, 2009
"i got this for a friend of mine's daughter.She started taking it on Monday. Her teacher called her mom on Friday and asked her what she had been doing different ,that her child was so focused and had been completing all of her tasks at school. Really made a difference without side effects."
3 of 3 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Reviewed by: curious
Location: Southern California
Gender: Female
I shop for dietary supplements: Once every 1 to 3 months
Shopping style: I depend upon a company's thorough educational content before I buy.
I've been using dietary supplements for: More than five years
Title: Takes the edge off! Date: April 10, 2009
"I have been using this product for years. I like the fact that Swanson uses the Suntheanine brand since this is the brand that was tested in clinical trials. Other companies offer L-Theanine but not always the Suntheanine brand. L-Theanine works by producing a calm, not tired state of being without side effects."
2 of 2 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: JiffyBoy
Location: Grandview, MO
Gender: Male
My Generation: Generation X (between 1965 and 1976)
I shop for dietary supplements: Once every 3 to 6 months
Shopping style: I depend upon a company's thorough educational content before I buy.
I've been using dietary supplements for: More than five years
Top 500 Contributor Top 500 Contributor
Title: Amazing Date: November 21, 2008
"I love this product. It keeps working for me every day, without losing effectiveness. It doesn't make me drowsy and I sleep much better. I take this in combination with GABA and my mood stays up while my stress goes down."
5 of 5 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: graceBoatrocker
Location: midWest
Gender: Female
My Generation: Baby Boomer Generation (between 1946 and 1964)
I shop for dietary supplements: Once every 1 to 3 months
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: More than five years
Date: March 26, 2008
"i highly recommend this amino acid supplement. i've been taking this every day for a few years now. this is the best quality product for the best price anywhere."
4 of 4 people found this review helpful.
Overall: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Value: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Convenience: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5
Reviewed by: IceMan
Location: Columbus, OH
Gender: Male
My Generation: Generation X (between 1965 and 1976)
I shop for dietary supplements: Once every 1 to 3 months
Shopping style: I come to a website prepared to buy, and I want to checkout quickly.
I've been using dietary supplements for: My entire life
Title: Not many product work this well! Date: October 2, 2007
"At the end of a coffee filled day stress can really stack up. After two months of L-Theanine I'm still impressed that it helps me calm down and feel less stressed. Most supplements work for a while then taper off in effectiveness. This one is still working for me and I keep ordering."
19 of 19 people found this review helpful.
Ratings-Only Reviews Based on the average of (4) ratings-only reviews
Overall Rating 4.5 out of 5 4.5 out of 5
Would recommend?: Yes  4 out of 4
Quality 4.75 out of 5 4.8 out of 5
Value 4.75 out of 5 4.8 out of 5
Effectiveness 4.5 out of 5 4.5 out of 5
Convenience 4.75 out of 5 4.8 out of 5
Satisfaction 4.5 out of 5 4.5 out of 5