L-theanine for Dietary Supplementation User Reviews (Page 5)
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
- Happy...
- Taken for less than 1 month
- December 21, 2022
"Since combining L Theanine with Magnesium Taurate I didn’t have the need to take my beta blocker (metoprolol) anymore. I did have to taper off metoprolol for good measure since it can be dangerous to stop taking it suddenly."
- Kirk...
- Taken for 1 to 6 months
- May 7, 2023
"Researching these type of supplements is a good idea before popping pills left and right. Some medications can interact with supplementation. One size does not fit all, and if you are taking prescription medication, a negative drug interaction can occur. I have an uncle, that cannot eat seafood, if he does, his entire body will break out in a rash, and he will need to get to an ER ASAP. Everyone is different. Experimenting with nootropics, I have sought to underdose and skip days. I have found positive effects from these type of supplements. L Tyrosine and L Theanine are similar, but different. I would suggest you wear your seatbelt, research, and tread carefully on the freeway of nootropic supplementation. Do what you gotta do. Follow doctor advice"
- jivec...
- Taken for 2 to 5 years
- April 27, 2021
"I've been using this for years.The first to counter glutamate sensitivity or reactions which it does very well. I've used it to relax but (for me) it lasted to long. I felt my most relaxed and tired about 8 hours after I took it so I assume it has a long half-life. It's not something to chill you for 2 or 3 hours. For the last 9 months or so I been using it a help sleep. Just 100mg a few hours before bed helps but doesn't keep me asleep for more than 4 hours. I find adding anything to this like melotonin or inositol to improve sleep just causes side effects. In fact just the L-Theanine alone after 8 months or so of use started to cause all day dizziness and headaches that made me have to stop using it. I keep it now in case I eat something dining out that's very high in glutamate (like seafood) or has unlabeled MSG as I do get reactions like elevated BP and pulse which this definitely helps with. Great for occasional use."
- Stoic...
- Taken for less than 1 month
- March 8, 2023
"Decided to try this to help with minor anxiety - not interested in taking prescriptions. Started with 400mg/day (200 mornings, 200 evenings), felt good, and was generally stress-free for a few days but wanted to see how I'd do with 300/300mg a day (600mg total for a day). I'm 6'4", 200 lbs. Found myself having a strange reaction one night with very low blood pressure and could literally feel my breathing getting way too shallow. I already have low blood pressure. Backed off of this and only did 200mg in the morning, cut way back on caffeine, and feel much better. Just be careful if you go above 400mg/day. Also, the half-life of l-theanine is very long and stays in your system for a while so keep this in mind. Overall I do recommend l-theanine if you know what you're doing."
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- Jay...
- Taken for less than 1 month
- November 23, 2021
"Took 225 mg before bed for several nights in a row (4 or 5 maybe). I did sleep well and had vivid dreams. I noticed my premature atrial contractions that I have had diagnosed previously were especially frequent and bothersome. I have had them now and then my whole life but they are only frequent and dizzying under periods of extreme stress and fatigue, which I am not experiencing right now. I didn't correlate the 2 until I found others reporting palpitations. Unfortunately I haven't taken theanine in a couple of weeks but the problem persists. Obviously I can't say for sure it caused the problem but it is the only change in my routine that I can correlate it with. It hasn't gone away with cessation of the supplement though. 225mg is quite a high dose apparently. Be careful and start with 50mg if you are going to try it."
- Issy
- Taken for less than 1 month
- October 10, 2021
"I've had sleep issues for the past week since stopping smoking cannabis. I took nutritional advice at a health food shop and bought L-theanine and Sereton 5-htp. I took one each of the capsules shortly before going to bed last night, following the directions on the bottles. I had a terrible night with stomach pains and nausea and then a headache developed. These symptoms have remained more or less constant, with a slight reduction for a time after taking paracetimol. It is now 4.25 pm. I will not be taking either of these supplements again."
- swiss...
- Taken for less than 1 month
- August 2, 2021
"I felt so spaced out couldn't really work, I got focused on doing all kinds of things I've wanted to do for a long time but not work. I couldn't calm down in the evening had this urge to get stuff done, organize things etc. very unpleasant. Somehow made me a little bit calm, but mostly way to over the place to get anything done sensibly. Now I feel exhausted after a few days of it, feel as if i'd have been on drugs for a few days."
- Jennie
- Taken for less than 1 month
- April 5, 2022
"I am a 18 female and I have tried the l-theanine and caffeine combination many times to help with my ADHD and mild anxiety but it has zero effect on me. Whether I take it on an empty stomach or not. I tried upping the dose, still no results."
- cmano
- Taken for less than 1 month
- December 20, 2021
"If you have Low Blood Pressure, do not take L-theanine. I took only a single capsule and have felt light headed and shaky to the point that my body is trembling. I feel like I am going to pass out. I was prescribed L-Theanine for my general anxiety. You would think that considering I have a history of low blood pressure that the doctor would mention it could lower my blood pressure further. I guess it is on me for not doing enough research."
- Romcg...
- Taken for less than 1 month
- November 25, 2021
"Started taking 100mg to help fall asleep and it worked great, took it about 30 min before bed. But then I began to realize additional muscle fatigue and stopped taking. As with all supplements, they are trial and error. Did not notice any other side effects."
- Jwc
- Taken for 1 to 6 months
- May 22, 2022
"Diagnosed in the early 90s ADD as a kid, docs tried me on all the usual suspects, made me a zombie kid, I hated it. 30 years of non medicated personal mind battle later and I leaned about L-theanine. I take 200mg morning and again after dinner. First dose ever, after 30 min or so, it was like the dust cloud in my head settled and the uncontrolled randomness of my otherwise frolicking mind just kind of chilled out. Not some voodoo miracle, but a legitimately settled and amiable thought process for me. Unfortunately about 4 weeks in and I believe it to be causing a pretty low grade but almost constant nausea with an unsettled but not painful stomach. I am going to stop for a few days/week to confirm my experience. I do not notice any real boost when combined with caffeine but I may tinker more, I don’t drink coffee so I may need more caffeine content. May try a different brand l-theanine also, I really feel it helped me in a life altering way as long as I can beat the nausea."
- Kmj
- Taken for 1 to 6 months
- March 11, 2022
"So far pretty good after a month. Taking 200mg twice a day for stress and anxiety with heart racing, shaking, sleeplessness. Certainly takes the edge off but honestly not working as well as I thought it would. I have high hopes as I became seriously addicted to tranquilizers and anti-depressants 10 years ago and it took me a year of horror to get off them. My body simply doesn’t metabolize these drugs. So no way will I ever take another and so hoping I -theanine will help through my anxiety as the older I get, the more anxious I seem to become as life happens while we plan it. Thanks everyone for sharing your experiences."
- David
- Taken for less than 1 month
- September 8, 2021
"I'm surprised I haven't heard of L-Theanine before now. With an anxiety disorder and insomnia, I worry a lot and, as a result, don't sleep well, if at all. I've been taking 200mg at bedtime (only) and it definitely helps to slow "the wheels" but it doesn't do much for sleep. So I add a Benadryl 25mg and that does the trick. Since I don't like taking the Benadryl every night, I ordered a bottle of Passion Flower to see if that will help. I've been on this routine for about 2 weeks. I should add that, even though I'm not bothered much by anxiety lately - except for later in the afternoon - I do have a kind of fogginess in my head all day... like having a wad of cotton in my skull instead of a brain. Maybe it's the Benadryl."
- Rachel...
- Taken for 6 months to 1 year
- July 6, 2016
"I have been taking this for about 6 months after being diagnosed with Generalized anxiety. This stuff is a lifesaver. I'm not worrying all the time and I can actually relax. Definitely worth trying!"
- Michael...
- March 6, 2015
"I take anywhere between 200 to 2000mg's (Yes, 2 Thousand milligrams/2 grams) and it works wonders for anxiety and panic and also stress in general. Great with caffeine too."
- KD778
- March 25, 2014
"I take theanine with my morning coffee- it cuts out any jitters and goes well with caffeine. I mix approximately 250 mg L-Theanine powder into the drink. "
- Genie...
- June 29, 2016
"I had terrible anxiety and insomnia, since taking l-theanine I have no anxiety and I am now have no issues sleeping. For me it has been amazing."
- zakb
- November 10, 2013
"I found l-theanine to have no effect on anxiety, sleep or mood. There were no negative effects either. I used 200mg/day"
- Bnatu...
- Taken for less than 1 month
- September 22, 2016
"So much better than Prozac or Zoloft. No side effects"
- Tea
- May 14, 2016
"It's great. I deal so much better with stress. It doesn't make me sleepy"
- Rut
- Taken for less than 1 month
- April 15, 2020
"This drug increased heart rate, feel sedative and the same time more depressed and stressed."
- Avinger
- Taken for less than 1 month
- June 4, 2017
"Relieves stress, calms your mind, helps you focus on your thoughts"
- Texan
- Taken for 1 to 6 months
- March 1, 2019
"I take 200 mg before bed. Helps calm my mind and allows me to sleep longer and deeper."
- Calif...
- December 14, 2017
"L-Theanine works as well as 1 mg xanax for restless leg syndrome."
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 and got a headache about two hours later, along with some brain fuzziness. Not entirely miserable, but definitely not desirable. Not sure if I've felt noticeably calmer or more focused."