For me this really took away any side effects of Adderall that I was was experiencing. I don't even care if it's placebo, not that I think it is. But it works for me so I'm going to keep with it. On days where I don't take Adderall it works great with caffeine as well. It helps me keep the benefits of caffeine without the side effects. When I started on Adderall for ADD I felt like it was not doing what it was supposed to do and instead just making me anxious and on edge. Combine with this supplement (which my doctor recommended I take) I feel like the Adderall is finally doing what it is supposed to do for my ADD and I feel some normalcy coming back into my life.For me though it does make a BIG difference if I take this on an empty stomach as it says to do. If I don't follow the directions and take it on an empty stomach then it does not seem to work as well if at all. If anyone is having no noticeable effects I wonder if they are following the directions and taking on an empty stomach. But of course, everyone's body is different so it really might just not work for some. I take it first thing in the morning and wait at least 30 mins before breakfast. Read more

Great brand of Theanine! Love doctor's best, it works very well and is a lot cheaper than the actual "suntheanine" brand.L-Theanine is the chemical found in tea leaves which has been used for thousands of years to promote relaxation, a calm sort of awareness, reduce anxiety and help people sleep. It's commonly combined with caffeine (usually 2:1 theanine to caffeine, so for example 200mg theanine to 100mg caffeine) as a nootropic to help people focus and stay alert while minimizing the jittery feeling of the caffeine. It's great for stress and anxiety too, and if you combine it with some melatonin you'll get the best sleep of your life lol. I take 2 capsules per day, one with my caffeine and once again before bed with melatonin. I'm overall a lot more calm and can sleep a lot better now so it works. Read more

I have tried multiple brands of L-Theanine and have found that Doctor's Best is the only brand that works for me. 5 years ago L-Theanine was recommended to me for anxiety at a GNC, no matter how much I would take of that brand I felt no different and wrote it off as ineffective. The beginning of 2015 I was reading again about the anxiolytic effects of L-Theanine and proceeded to buy Doctor's Best off of amazon. This is the only supplement I have ever finished because of how much it has benefited me. I have panic disorder and I recently went on a road trip and was able to make it through by taking this l-theanine (I have prescribed medication but that makes me much more groggy which I do not care for). When I ran out of the Doctor's Best I went to the local health foods store and they didn't carry this brand so I settled for the chewable Natural Factors suntheanine and had noticed the effects were not as effective as Doctor's Best Suntheanine.I know everyone's body reacts differently but if you do struggle with an anxiety disorder that is negatively impacting your life I really do recommend trying this and seeing if it makes a difference on your state of anxiety. Read more

This is the greatest supplement for those whose minds cannot shut off at night time, making sleep difficult It is NOT a sleep aid per se. it is a calming, relaxing green tea extract that stops the squirrel cage from spinning with worries and to-do lists when trying to sleep.No side affects, no grogginess in the morning. Can also be helpful when flying or in stressful situations as it just calms the butterflies in the stomach a bit. Read more

I started taking Theanine to help with insomnia. I had not found anything that worked significantly and my doctor was unhelpful. I had tested high in Cortisol using the saliva test and suspected this had something to do with the insomnia. I was waking up almost every night at 3 am when I did fall asleep and I was burning up and my knee joints hurt. Theanine is supposed to lower cortisol by increasing GABA . I had tried other Amazon supplements that were supposed to lower Cortisol to little effect. I started taking Theanine in the evening and the waking up at 3 AM and the burning up stopped. the joint pain stopped also. I was also having an easier time falling asleep in the evening. I take blood pressure medicine but it only lowers it to the high normal range. I measure my blood pressure twice a day normally. I noticed after taking my evening theanine, in 30 min after taking it my BP went from 152/84 to 138/76. After a week my knees felt better than they have in a year. i started taking this stuff twice a day now, I am going to experiment with lower dosages more frequently and see how that works out. Read more

I have generalized anxiety and panic disorder and have tried literally everything. I have been taking Doctor's Best magnesium which has greatly helped. I recently have been reading a book that recommended l-theanine for anxiety. I took one capsule before bed, felt a little calm and relaxed after 30 min. Fell asleep. 1.5 hours later woke up to one of the worst panic attacks ever. Felt like I couldn't breathe, jittery, racing heart. Took two hours to snap out of it. Had to cancel all of my appointments for the following day and spent the whole day recovering from a horrible night. Might work for some, but be careful. Maybe 150 mg is too powerful. I threw mine away! Read more

I was confused before buying it.. But really impressed by its result. Feels very calm Read more

I like it Read more

Have taken it before interviews. It increases alertness and makes me calm for few hours. But I only take 150mg a day. Read more