L-theanine for Dietary Supplementation User Reviews (Page 3)
L-theanine has an average rating of 5.3 out of 10 from a total of 129 reviews for the treatment of Dietary Supplementation. 46% of reviewers reported a positive experience, while 47% reported a negative experience.
Reviews for L-theanine
- BAM
- Taken for less than 1 month
- January 11, 2019
"This really does help you be calm and focus, however it gives me severe insomnia. Even if I take it in the morning, I can't fall asleep that night. It's like my brain is completely wired on it and what little sleep I got was very restless. If you have insomnia, I would recommend testing this out on a day where you don't need to be up for anything the next morning."
- peaches
- Taken for less than 1 month
- November 12, 2020
"I and panic attacks for a few years now. I am on effexor (75 mg) and klonopin (very little.) Since my dr wants me off the klonopin and my anxiety has seemed to get worse I decided to find other alternatives. I looked to magnesium which really seems to help, I noticed L-theanine and like most of you I took it and felt the anxiety. I was like, what? Isn't it supposed to relax me? Well, I felt just the opposite. It subsided on its own and I wasn't sure it was the pill so I took it again at bedtime and yep, the same. So I won't be taking any more."
- Jdano
- Taken for less than 1 month
- October 4, 2019
"I've been having panic attacks. I researched and saw this was highly recommended. I took 100mg in the morning. That's it. I only took one. It made me feel calm, then way too hyped up and my heart started beating very fast. I got all jittery. I panicked because of the fast heart beats! I thought I was having a heart attack. Never again."
- Kano
- Taken for less than 1 month
- July 27, 2019
"Been taking it for a week and have had very vivid dreams, clenched fists, crying, nightmares every single night. Thought it may have been coincidence but I think not since that's the only thing I did differently. I think I will just go back to taking my 10mg of melatonin."
Are you taking this medicine?
- General...
- Taken for less than 1 month
- July 11, 2019
"48 year old male. Took it for general anxiety disorder, tried ever med out there , almost every one , some worked for a couple of years then stopped working so I go to another, on these meds for 19 years, very medication sensitive, got off all meds a year ago, still had a little anxiety so took l-theanine for about a week worked really well for 7 days then suddenly developed a massive headache with extreme neck pain and dizziness I stopped talking l-theanine 250mgs, it's been 2 days since I stopped and the headache and neck pain is almost gone. Definitely Not for me , allergic to pain lol!"
- billy
- Taken for 1 to 6 months
- January 28, 2021
"I tried this when my doctor recommended it for my chronic insomnia, 100mg. I find it has the opposite effect. While it relaxes you it makes you mind very aware and focused, too much so to sleep. I woke many times in the night and after a few nights I just didn't sleep. While I did not have rapid heart beats like many have reported on here I did have substantially elevated blood pressure about 5 or 6 hours after taking the pill (every time). I'm wondering how many of those reporting pounding heart beat also had high BP but didn't have a BP reader? I know generally doctors doesn't love you taking amino acids individually because your not getting a natural product in a small proportional dose. l theanine is not something I'd take again. Anything that effects your brain chemistry you need to be cautious with."
- golde...
- Taken for less than 1 month
- November 28, 2021
"I am a 21yr old female with medicated ADHD, but no other health problems. Everything I've read has said that L-theanine helps with ADHD stimulant medication jitters, without any side effects. I took 200mg yesterday afternoon. What followed was what I felt was the worst human experience imaginable. Within 40 mins, and for 5 hours afterwards, I was dissociating for the first time in my life (everything felt distant and like I wasn't in my own body), every muscle was twitching, I was easily startled, tachycardia I could not stop crying, and every time I closed my eyes all I could see were rapid flashes of light, as if I was seeing my own neurons firing off. This supplement took me to depths of sadness that I did not know were possible for anyone to feel. Even now, well over 24hrs later, whatever trace amount of l-theanine is still in my system has rendered my ADHD medication useless and I am still unwell. I hope it clears within the next few days--I just want my life back."
- Strug...
- Taken for less than 1 month
- September 29, 2019
"At first I noticed that my anxiety was decreasing while taking this but as I continued to take it I got extremely depressed and felt weird (my anxiety came back). My emotions were very scattered and I don’t know if it was because of this supplement because I heard there’s not supposed to be any side effects. Regardless I think I’m going to stop taking it"
- kat
- Taken for less than 1 month
- July 30, 2019
"I struggle with Generalized Anxiety Disorder and I hate the way medicines make me feel! I saw some stuff about l-theanine and was excited to try something holistic with so many great reviews. At first it was great, I noticed a calming effect within 30 minutes, I felt focused and alert and overall in a good mood. I started taking 2 100 mg pills a day. After 2-3 weeks I started noticing some changes.. I felt like I just couldn’t focus at all, was in a weird depressed mood, wanted to sleep all the time, had no motivation to go workout. And if I didn’t take it at all.. I felt HORRIBLE; dizzy, anxious, bad headaches. I stopped taking it about 3 days ago and I’m trying to adjust. It just didn’t agree with me.. maybe I should have just been taking it a few times a week rather than everyday but I think for now I’ll just steer clear."
- kalhoon
- Taken for 1 to 6 months
- December 12, 2016
"I was considering talking to my doctor about my anxiety, then a friend suggested stress formula by sundown. I cant believe how well this works, for the money and not worrying about harmful side effects, this is the way to go for me!"
- Stacey
- Taken for 1 to 6 months
- March 19, 2019
"This raised my amalyse and lipaise levels to such a high level that my Dr ordered a CAT scan luckily for me the CAT scan came back fine. I stopped taking the supplement they redid my blood work two more times after discontinuing this supplement and my level started to return to normal kind of. This scared the crap out of me, that an over the counter supposedly safe medication would do something like that to your pancreas"
- Paul
- Taken for less than 1 month
- November 15, 2018
"Tried l-theanine for my chronic insomnia. Just one pill taken a few hours before bed made me have crazy vivid dreams almost as soon as I fell asleep and I was awake again after only an hour but could not get back asleep, I already have exhausting dreams when I do sleep but this supplement seems to massively increases them even on the small dose I took. It may work for some to keep them asleep but it's not for me. I didn't realise it increased dreaming until I researched it the next day. Seems half of other people have the same reaction."
- Anonymous
- October 6, 2020
"I have taken l-Theanine for several months after WLS. I suffer from anxiety and it has helped me a lot I drink it with coffee and it gets me through the day I take 100-200mg a day. Today I took 300mg I completed all of my College Assignments which I sometimes procrastinate on... I feel relaxed and motivated. I think it works for some of us but not for all. I love it!"
- Betty
- April 22, 2020
"I took this supplement this morning on the way to work. By the time I got to work I felt a little tired and dizzy. Within an hour, I became so nauseous and dizzy and my head felt tight and my neck got stiff and my arms started to feel weak and I got a little confused when trying to talk.. I had to leave and go home. I still feel all of those things. I will not be taking this supplement again."
- Paola
- Taken for less than 1 month
- January 16, 2021
"Well I tried l-theanine because I was taking ashwaghanda but I was still getting a little of anxiety. The first day I started I felt tingly and a little weak but I thought maybe because it’s the first time so I kept on taking it. By the third time I started feeling a little sad for no reason and then the fourth day I didn’t feel like that but then the 5 Th day I felt negative again and I wasn’t feeling like this with ashwaghanda at all so yeah it’s not for everybody so be careful"
- Balan...
- Taken for 6 months to 1 year
- May 8, 2018
"I've lived with anxiety my whole life, and in my 50s now, post menopausal, trying to reduce my tension and mood swings. Pharma made me too sleepy and had side effects, so I gave up on those in my late 30s. L-theanine was recommended by a pharmacist, and I've taken 100-200mg a day in the morning and it has worked wonders with my anxiety. It allows me to be calm enough to make cognitive changes and choices before I over-react. It has also helped with my foggy thinking, allowing me to focus. I noticed it in my dog's "calming chews" interestingly enough. Have also started giving it to an anxious teenager and it helps with focus. It taken only in morning, it may avoid the sleep issues that some have, but I've found that another 100mg might be needed in afternoon. I've had no sleep problems with it, but that could be because I usually only take in the morning."
- Jilly...
- Taken for less than 1 month
- December 15, 2019
"Last night before I crawled into bed I took two L-Theanine. Within 15 minutes I felt a massive wave of relaxation and fatigue sweep over me. I honored my feelings despite it being relaatively early in the evening and turned out the lights at 8:30. Within an hour of falling to sleep I experienced a horrifying dream. I rarely dream so this was something rather unusual for me. Following my dream I awoke an hour or so later with my heart pounding. Thank goodness I was able to successfully fall back to sleep. I have yet to try this supplement during the day which I've read can help manage feelings of stress and anxiety in the work place and at home. I was really impressed with how quickly this product promoted a sense of peaceful relaxation. I think L'Theanine may become a product I can depend on that will help calm my mind and settle my emotions as I prepare for a sound, restful night sleep."
- Mild
- November 11, 2020
"I took l-theanine at 200 mg dose at 2 am in combination with 100mg caffeine. I was hospitalized hours later. After the extreme weakness and dangerously low blood pressure it caused, Panic attacks almost drove me crazy. It doesn't seem to work well for everyone."
- Anonymous
- Taken for less than 1 month
- September 29, 2017
"Took one 200 mg pill with dinner, after an hour felt relaxed, my neck felt relaxed, tightness gone. However, I had the worst night sleep, woke up several times and finally at 2:30 am, gave up and got out of the bed. I definitely had a strange reaction to it. Won't be taking it again."
- And
- Taken for 1 to 6 months
- November 11, 2019
"Works well to increase both light and deep sleep. I noticed that within 6 hours I had 2 hours deep sleep which is very good. If taking in the morning works well with caffeine to avoid feeling sleepy. Also to aid sleep at night taking with magnesium works. Anyone who gets a tummy problem try taking with digestive enzymes. Anyone taking this who feels specific pain areas might want to get their liver, gall bladder or pancreas checked because it isn't normal."
- Copsg...
- Taken for less than 1 month
- January 18, 2018
"My holistic friend recommended this supplement to me after the passing of my Mom. I could not rest, & my emotions where off the charts! But after using this for couple of days along with 5 HTP I have been calmer and more in control of my emotions, without feeling all drugged up or walking around in a daze. I will continue to take both supplements to help manage my depression. I highly recommend both supplements."
- Aaron...
- Taken for 1 to 6 months
- May 21, 2021
"I buy the powdered ltheanine which is better as it is pure and does not have any other ingredients in it i put it under my tongue and the effects are almost immediate and calming as it goes straight into the blood stream then swallow the rest"
- RJD
- Taken for 2 to 5 years
- July 27, 2020
"I've used the amino acid (not drug) L-theanine off and on for many years. I have inattentive type ADHD and generalized anxiety disorder (GAD). Depending on the dose, and what I take it with (coffee for example), it can make me feel simply a little bit calmer to being really sleepy, or in between. I have never had a problem with it, though for some reason it makes me hungry. "
- Tracey
- Taken for less than 1 month
- March 1, 2018
"I had been taking 3mg melatonin for sleep, but wanted to cut back as it left me feeling somewhat drugged. I found a product that contains 1.5mg melatonin plus 100mg l-theanine in a chewable, gummy form. It’s been working great for me for about a week. I feel this combo “lets” me sleep vs. “puts” me to sleep. However, I’m not sure sure if it’s the level of melatonin, the l-theanine, or the combo that works so well for me, but I’ll continue with it for awhile."
Reviews may be edited to correct grammar/spelling or to remove inappropriate language and content. Reviews that appear to be created by parties with a vested interest are not published. This information is not intended to endorse any particular medication. While these reviews may be helpful, they are not a substitute for the expertise, knowledge, and judgement of healthcare professionals.
"Took 100 mg of L theanine with a 20oz coffee. Felt energetic and very focused all day long just like it said I would. Went to sleep and remember having bad nightmares. Woke up at 4am with the worst gas and diarrhea I ever had (to the point I thought about going to the ER). I do believe they are onto something with this drug, but by the way it randomly effects each person completely differently tells me that more research is needed. It is asinine to be sold over the counter"