L-theanine User Reviews & Ratings (Page 5)

• Indig...
• Taken for 1 to 6 months
• May 18, 2023

For Dietary Supplementation "I’ve taken it twice with different responses. First time: 400mg in the daytime and it sent me absolutely doo-lally and I was totally hyper manic. I couldn’t settle. Three years later I tried it again at 400mg in daytime. It was a last resort as I was totally sleep-deprived/stressed and thought “I’ll try anything.” Within an hour I had to lie down and take a three-hour nap. I then used it over a period of two months. First as an ad-hoc sleeping aid. I find it doesn’t lengthen sleep much, maybe an hour, but the quality of sleep is higher. There can sometimes be what feels like mild grogginess but is easily overcome by just doing something. Then I’m pretty productive, can hammer through mundane tasks with ease, and stay on track with routine computer work. A great benefit was in tapering off caffeine (50-100mg per mug) - pretty much removed all side effects. The only difference I can see was an underlying infection the first time around."

• Jack
• Taken for 1 to 6 months
• October 15, 2021

For Dietary Supplementation "Heart palpitations within 5 min of taking 100mg. This is after about one month of usage without any problems. It was providing me the benefit of a clear head, no fogginess when waking up, but the palpitations are concerning and affect sleep quality. Will try to reduce dosage to 50mg."

• MrTom
• Taken for less than 1 month
• August 22, 2021

For Dietary Supplementation "I was very sceptical of a supplement doing anything for my anxiety/panic which has been pretty strong, like a nervous breakdown. I wanted to avoid SSRIs (bad experience in past) and therapy hadn't helped. Well I'm shocked at how powerful L-Theanine has been. I've been taking a big dose (350mg tablet x3 a day) and it feels like I'm taking diazepam, just without side effects or withdrawals. A zen-like blanket of the mind. The worry thoughts are still there but it's like you float through them. Hard to describe...a warm fuzzy feeling a bit like a tab of acid (from my younger days). If you're a cynic like me, try it, definitely before your doctor puts you on a hard drug."

• laugh...
• Taken for less than 1 month
• January 5, 2021

For Dietary Supplementation "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."

• Drano
• Taken for 2 to 5 years
• July 23, 2021

For Dietary Supplementation "My neighbor (82 y.o) was suffering from convulsions. She was taking plenty antiepyleptics to stop it and in vain and she was feeling like a "vegetable". Convulsions started suddenly and in the morning. Eventually I put her on L- Taurin 1000 mg+ L-Theanine 500 mg + L-Glycine 1000 mg along with PQQ 20 mg and Q10- 100 mg and her attacks stopped. She does not take anymore her "classic" meds. Though she continues on her cardiac meds, but the pleasant of bonus of this cocktail was that her blocked ed arteries were cleared, which is amazing. Nobody expected this effect. She had both carotid arteries blocked on 75% and when she went for routine control its were just 45% one and 50% second. Cardiologist was shocked. So she continues to take this cocktail already for 3 years and her cognition with vision is significantly improved too. Highly recommend."

• jivec...
• Taken for 2 to 5 years
• April 27, 2021

For Dietary Supplementation "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."

• Happy...
• Taken for less than 1 month
• December 21, 2022

For Dietary Supplementation "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

For Dietary Supplementation "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"

• Carlf...
• Taken for 1 to 6 months
• October 23, 2023

"I started it around June after doing extensive research on it online. I was going through a very stressful time in my life at the time multiple stresses in my life. Cancer scare with my mom relationship issues due to being unemployed. I started the drug end of June, it started working only after about 3 days. I don't know what it took so long to work. I started with 400 in the morning then started 600 mg every morning. I found that if you didn't eat something with it, it made me very sick. I read later that it had to do with the fact that it is an amino acid, so it messes with your stomach acid causing you to get sick if not taken with food. It saved my life after that. I was very close to checking in somewhere due to the constant paranoia and fear. It was literally driving me insane, being in a constant state of fear. I felt disconnected and not myself. It made things go away in almost a strange way. I remember driving and suddenly it didn't feel anxious anymore."

• Jay...
• Taken for less than 1 month
• November 23, 2021

For Dietary Supplementation "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

For Dietary Supplementation "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

For Dietary Supplementation "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

For Dietary Supplementation "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."

• Lynne
• Taken for less than 1 month
• July 21, 2023

"I tried this as recommended by a herbalist at my local health food store as I'm very hesitant to take other psychiatric medication. He said not to mix it with benzos. I only took one a day, 200 mg. This gave me the calmness and peace I was looking for but I had no memory whatsoever. I would forget conversations and it was quite awkward. I would have horrific night terrors. My klonopin had stopped the nightmares, so I'm only taking them during my PMDD week. They do help calm me down to the point of feeling doped-up sedation and they kill my appetite. Consult your doctor if you decide to try this. I love/hate this supplement."

• cmano
• Taken for less than 1 month
• December 20, 2021

For Dietary Supplementation "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

For Dietary Supplementation "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."

• Kmj
• Taken for 1 to 6 months
• March 11, 2022

For Dietary Supplementation "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."

• Jwc
• Taken for 1 to 6 months
• May 22, 2022

For Dietary Supplementation "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."

• David
• Taken for less than 1 month
• September 8, 2021

For Dietary Supplementation "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

For Dietary Supplementation "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

For Dietary Supplementation "I take anywhere between 200 to 2000 mg's (Yes, 2 thousand milligrams/2 grams) and it works wonders for anxiety, panic, and stress in general. Great with caffeine too."

• Genie...
• June 29, 2016

For Dietary Supplementation "I had terrible anxiety and insomnia, since taking l-theanine I have no anxiety and I now have no issues sleeping. For me, it has been amazing."

• KD778
• March 25, 2014

For Dietary Supplementation "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."

• zakb
• November 10, 2013

For Dietary Supplementation "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

For Dietary Supplementation "So much better than Prozac or Zoloft. No side effects."