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Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count
Sustainability features
This product has sustainability features recognized by trusted certifications.
Reduced air and/or water in the product or packaging for more efficient transportation.
Compact by Design identifies products that, while they may not always look very different, have a more efficient design. By reducing water and/or air in the product or packaging, these become more efficient to ship. At scale, these small differences in product size and weight lead to significant carbon emission reductions.
Purchase options and add-ons
Brand | Doctor's BEST |
Flavor | Unflavored |
Primary Supplement Type | multivitamin |
Unit Count | 90 Count |
Item Form | Capsule |
Item Weight | 0.14 Grams |
Item Dimensions LxWxH | 2.13 x 2.13 x 3.69 inches |
Diet Type | Gluten Free |
Product Benefits | Relaxation |
Age Range (Description) | Adult |
About this item
- Doctor’s Best L-Theanine contains Suntheanine, a pure form of L-Theanine on the market produced via a patented process that mimics the natural process in green tea leaves. L-Theanine helps promote a healthy mood and a restful relaxed state while maintaining daytime alertness
- Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
- CALMNESS – L-Theanine supports relaxation and a sense of calm without causing drowsiness or loss of focus. This amino acid found naturally in tea helps support healthy stress response, relaxation, focus and memory
- SUPPORTS BRAIN HEALTH - L-Theanine is a powerful Amino Acid that enhances cognitive performance and alertness. L-Theanine may help improve quality of sleep, learning performance, concentration and help support the immune system. L-Theanine may also help reduce the negative effects of caffeine
- SUNTHEANINE - L-theanine is an agent that is used for nervousness and tension by supporting mental tranquility. Suntheanine may normalize the body’s stress response and condition the body to handle stressful situations better
- During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.
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PRODUCT CERTIFICATION (1)
Compact by Design (Amazon-developed Certification)products have reduced water and/or air in the product or packaging for more efficient transportation.
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Sustainability features
This product has sustainability features recognized by trusted certifications.
Reduced air and/or water in the product or packaging for more efficient transportation.
Compact by Design identifies products that, while they may not always look very different, have a more efficient design. By reducing water and/or air in the product or packaging, these become more efficient to ship. At scale, these small differences in product size and weight lead to significant carbon emission reductions.
Focus on sustainability
Small changes in product size & weight lead to lower carbon emissions.
We created Compact by Design to identify products that, while they may not always look very different, have a more efficient design. With the removal of excess air and water, products require less packaging and become more efficient to ship. At scale, these small differences in product size and weight lead to significant carbon emission reductions.
Here are a few of the many ways products can qualify:
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Product Description
Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count
Product details
- Is Discontinued By Manufacturer : No
- Product Dimensions : 2.13 x 2.13 x 3.69 inches; 0.01 ounces
- Item model number : DRB-00197
- Department : Health and Beauty>Health and Wellness
- Date First Available : September 1, 2009
- Manufacturer : Doctor's Best
- ASIN : B001OXTGVG
- Country of Origin : USA
- Best Sellers Rank: #9,686 in Health & Household (See Top 100 in Health & Household)
- #9 in 5-HTP Nutritional Supplements
- #935 in Climate Pledge Friendly: Health and Household
- #1,324 in Sales & Deals
- Customer Reviews:
Compare with similar items
This Item Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | $20.21$20.21 | -10% $18.90$18.90 Typical: $21.00 | -18% $13.99$13.99 List: $16.99 | $21.95$21.95 | -39% $12.24$12.24 List: $19.99 | -25% $29.97$29.97 List: $39.99 |
Price Per Unit | $0.22 / Count | $0.63 / Count | $0.28 / Count | $10.98 / Fl Oz | $0.12 / Count | $0.17 / Count |
Delivery | Get it as soon as Monday, Apr 1 | Get it as soon as Monday, Apr 1 | Get it as soon as Monday, Apr 1 | Get it as soon as Monday, Apr 1 | Get it as soon as Monday, Apr 1 | Get it as soon as Monday, Apr 1 |
Customer Ratings | ||||||
Flavor | 4.7 | 4.5 | 3.9 | 4.4 | 4.2 | 4.4 |
Easy to swallow | 4.8 | — | 3.5 | 4.7 | 4.3 | 4.7 |
Value for money | 4.4 | 5.0 | 3.8 | — | 4.3 | 4.4 |
Sold By | Amazon.com | Amazon.com | Amazon.com | MaryRuth Organics, LLC | Amazon.com | Green Valley Health Market LLC |
keyword type | 5-htp-nutritional-supplements | multiple-vitamin-mineral-combinations | multiple-vitamin-mineral-combinations | multiple-vitamin-mineral-combinations | multiple-vitamin-mineral-combinations | vitamin-b8-inositol |
form | Capsule | Tablet | Chewable | Drop | Capsule | Capsule |
flavor | Unflavored | Unflavored | Tropical Fruit | Lemon Lime | Unflavored | Unflavored |
size | 90 Count (Pack of 1) | 30 Count (Pack of 1) | 50 Count (Pack of 1) | 2 Fl Oz (Pack of 1) | 100 Count (Pack of 1) | 180 Count (Pack of 1) |
weight | 0 pounds | 0.11 pounds | — | — | 0.1 kilograms | 0.1 kilograms |
age range | Adult | Adult | Adult | Adult | Adult | Adult |
product benefit | Relaxation | Promotes relaxation—without making you sleepy, Encourages brain wave patterns associated with wakeful relaxation, All day stress support with extended-release technology | Stress Relief | Stress Relief | Relaxation | Stress Management |
serving suggestion | 1 Capsule | Take one (1) tablet daily, or as recommended by a healthcare practitioner. | One Tablet | — | 1 capsule | 1 capsule |
Videos
Videos for this product
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MUST WATCH! Doctor's Best "VS" FORCE FACTOR
Our New Beginning
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1:10
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HONEST review of Doctor's Best L-Theanine with Suntheanine
Kiersten Zile
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0:34
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PRETTY GREAT ! Doctor's Best L-Theanine Capsules
✅ Nick B ✅
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Doctor’s Best. More than just a name
Doctor’s Best, Inc
Important information
Safety Information
This product is labelled to United States standards and may differ from similar products sold elsewhere in its ingredients, labeling and allergen warnings
Indications
not available
Ingredients
L-Theanine (as Suntheanine) 150 mg, Microcrystalline cellulose, modified cellulose (vegetarian capsule.)
Directions
One capsule daily, or as directed by a health care practitioner. Store in a cool dry place.
Legal Disclaimer
Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the quality, value, and effect of the nutritional supplement. For example, they mention it's a great product, works well, and is well worth the investment. Customers are also impresseded with the focus, and ease of swallowing. That said, opinions are mixed on performance and durability.
AI-generated from the text of customer reviews
Customers like the mood of the nutritional supplement. They mention that it helps them feel calmer, more lucid, and relaxed. They also say it promotes a calming attitude and reduces stress levels. Some say that it doesn't make them sleepy and helps with a good night sleep.
"...After I take even one dose, I sleep like the proverbial baby, with no waking, and no negative after effects the next morning/day...." Read more
"...It can cross the blood brain barrier and has a positive effect on alpha-brain waves; it has a relaxing effect, reducing physical and mental stress,..." Read more
"...the night if I can't go to sleep, and I find it tends to relieve symptoms of not sleeping, which in my case, are worse and probably more anxiety-..." Read more
"...After starting this supplement, I noticed a marked reduction in his stress level...." Read more
Customers are satisfied with the quality of the nutritional supplement. They mention that it works well, is generally effective, and is a high quality source of L-theanine. Some say that it's the best L-Theanine supplement they've ever taken and that it helps with anxiety.
"...It was incredibly timely!..." Read more
"...In general, I am very pleased with this safe and generally effective alternative to potentially risky prescription medications, and hopefully soon..." Read more
"...It worked great - but it was expensive. $30 for thirty tablets...." Read more
"...Awesome product. Helped me immediately. Here is some more helpful information about Suntheanine...." Read more
Customers like the value of the nutritional supplement. They say it's well priced, worth the investment, and the cheapest source of quality theanine on the market.
"...significant drop in anxiety and stress to this brand with a price that is excellent as well! Thank you, Nutricost!..." Read more
"...stay away from prescription medication -- this is certainly worth a try at the price that it is offered here...." Read more
"I got these because they had the best price per milligram of what's supposed to be genuine Suntheanine, which is the only brand that ever really..." Read more
"...It worked great - but it was expensive. $30 for thirty tablets...." Read more
Customers like the effect of the nutritional supplement on their blood pressure. They say it takes away any side effects of Adderall that they were experiencing. They also say it curbs all negative effects and makes a huge difference in their overall well being. Customers also mention that when taken with food, its effects are muted and it smooths the side effects.
"...dose, I sleep like the proverbial baby, with no waking, and no negative after effects the next morning/day. I do not take it every night...." Read more
"...The risks: I have had no side effects while using this, and I'm pretty sure many others can say the same...." Read more
"...A completely natural substance, Suntheanine does not produce the undesirable side effects produced by synthetic drugs such as fatigue and..." Read more
"...one of these in the morning with my all-in-one supplement it curbs all negative effects I would always get with caffeine!..." Read more
Customers say the nutritional supplement allows them to focus better, is great with coffee, and is good for caffeine sensitivity. They also say it helps them feel calmer, more lucid, and even more energetic. Customers also mention that it's great in the morning with coffee for focus without jitters.
"...I'm calmer, more focused, and less prone to depressive thoughts...." Read more
"...I am more focused, calmer, I don't forget where things are, I'm more patient, I don't feel the urge to talk all the time, I'm a better listener, I..." Read more
"...Finally I could rest! Later I also learned that it was good for caffeine sensitivity...." Read more
"...I am not as wired and jittery as I used to be and my focus has improved a great deal." Read more
Customers find the nutritional supplement easy to swallow. They mention the capsules are small enough and have no after taste. Some say the supplement helps detox the liver and digest all foods.
"Small capsule, super easy to swallow. I take one in the morning and one at lunch...." Read more
"...I feel the same. More stars because they are easy to swallow, and there's no flavor/after taste with them...." Read more
"...Easy to swallow caps. My 6 year old can often swallow these, so they aren't huge. I would say they are close to a sz 4 capsule...." Read more
"This is a Very Good product. The capsules are easily swallowed and take effect shortly after taking One. I recommend this form of L-Theanine" Read more
Customers are mixed about the performance of the nutritional supplement. Some mention that it does wonders, works well for anxiety issues, and improves sleep. They also say it works great with caffeine and a caffeine pill stack. However, others say that it didn't work well for them, doesn't have an instant effect, and loses effectiveness over time.
"...Suntheanine encourages the activity of neurotransmitters, which help regulate attention, learning, mood, memory, body temperature, appetite and sleep..." Read more
"I took this for about a week. I saw zero results... feels like a scam product." Read more
"I am beyond happy with this product. It is very effective. I’ve never been disappointed with a supplement from this brand...." Read more
"I was looking for an alternative to my prescription Xanax. It doesn't work like Xanax meaning its not an instant effect...." Read more
Customers are mixed about the durability of the nutritional supplement. Some mention that it seems to last most of the day, while others say that it wears off in a few hours.
"...One bottle easily lasts me two months compared to the one month with the more expensive brands...." Read more
"...It was too strong for me to use during the day, and took it only at bedtime...." Read more
"...I take this in the morning with breakfast, and it seems to last most of the day...." Read more
"...took this products I noticed a very mild calming effect that wore off in a few hours...." Read more
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Top reviews
Top reviews from the United States
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I researched, and purchased this item, as I was finding that my low carb focus dietarily, was - while good for me otherwise - seemed to be resulting in some unwelcome changes in terms of increased adrenaline. I had switched from my caffeinated coffee to decaf, and was experimenting somewhat unsuccessfully with teas, rueful smile. While feeling better through out the day, I found I still had, on occasion, episodes of waking from sleep with some pretty silly worries, that just refused to be "put to bed".
This supplement without question helps in that regard. After I take even one dose, I sleep like the proverbial baby, with no waking, and no negative after effects the next morning/day. I do not take it every night. I only take one, as directed, the next night before bedtime, if I have one of those wakeful nights the night before. Laughs, somehow that just gets more confusing each time I rewrite, but I hope the idea that, even if you only use it occasionally, It Works!
The good thing is L-Theanine is an amino acid; it's found in green tea. It can cross the blood brain barrier and has a positive effect on alpha-brain waves; it has a relaxing effect, reducing physical and mental stress, boosts mood and cognition. It also acts in concert with caffeine to boost cognitive performance. L-Theanine has been tested on small groups of people with significant sleep disorders, and while it's not overly sedating, it does affect alpha waves and tends to be relaxing. It helps those people with sleep, as it does with anxiety.
My husband and I recently added it to our Amazon subscription list of supplements when we read an article in Life Extention Foundation's December 2013 magazine about supplements one should consider adding when facing the flu. It was incredibly timely! No sooner did I get the magazine, read it, stock up and get enough for all the kids, than I got socked with a sinus infection/flu. I have never before gone without a course of antibiotics, but this time really wanted to make the effort. I hunkered down with my supplements - L-Theanine included, ate cooked mushrooms (natural anti-viral) several times, as well as maintaining good hydration, and stayed in bed. I finally made it through my very first painful sinus infection/flu w/o antibiotics!
So, yes, I heartily recommend L-Theanine! I'll keep buying it for myself, my husband, and our kids!
The effects: While you may not completely stop thinking anxiously, I find the amount of time spent worrying is greatly reduced. Usually as soon as an anxious thought crosses my mind, it's dropped within 10 seconds, and that's that. Obviously this can have a major effect, especially if you tend to overthink things. Your mind is calmer, depending on how calm or otherwise you were in the first place. Other people report benefits for focus and mental clarity too, and some people also report some sedation at higher doses.
The risks: I have had no side effects while using this, and I'm pretty sure many others can say the same. Suntheanine is infamous for being safe at high doses. I have taken up to 600mg (four capsules) at once and 1050mg (seven capsules) a day without any negative effects I can definitely attribute to the suntheanine. That's not to say there definitely isn't any, but you're pretty safe with this one.
The dose: The bottle suggests 1 capsule (150 mg) a day away from food. And for a lot of people, that would probably be okay. However, you are not strictly limited to this, and people with anxiety disorders can derive a lot more benefit from taking more than one. I have been told that I could take up to 1200mg a day (eight capsules) if I need to, and that larger doses in some people induces some degree of sedation (and even if it doesn't, the stress relief is still a good thing to have right before bed). I typically take one in the morning, one in the afternoon, and one or more just before I go to bed (I also take one in the middle of the night if I can't go to sleep, and I find it tends to relieve symptoms of not sleeping, which in my case, are worse and probably more anxiety-based). Lately I've been taking 600mg (four capsules) at night in response to insomnia - I can't yet conclude that this helps more since I've only done it three times. But in the beginning, one capsule was a fantastic way to end the day - it felt like all the stress of the day just vanished.
The drawback of having 1200mg a day is... you'll run out of this in less than two weeks. So I prefer to keep my consumption as low as possible without ignoring this in times of high stress. My average use for right now still cleans out a bottle within 1 month (it IS important to note, however, that I am currently attempting to drop other anxiety meds, so of course I am subject to some extra stress during this time, and the fact that I use this a lot definitely does not mean that you'll have to as well).
Another big plus over anxiety medication is you can simply take this as needed, not at set times every day. No withdrawal, no addiction, nothing like that. My psychiatrist has told me, however, that there are long-term benefits to using this. I haven't been able to verify that (actually, she's the only person I've heard that from, I've never read that online), but if you want to attempt to benefit from that, taking at least one a day as instructed is recommended.
In general, I am very pleased with this safe and generally effective alternative to potentially risky prescription medications, and hopefully soon this is the only thing I'll be taking for anxiety.
Top reviews from other countries
Severe Side Effects ..I feel low life
Felt Depressed speaking trouble
Regular L theanine was much better
Wasted hard earned money on this filthy product
Just trapped in patented name
Better get ashwagandha for gaba suppor more natural much cheaper+proper excercise
Anyway regret my stupid decision
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