Brain
Mood
Sleep
Stress
L-Theanine
Support a calmer mindset, sharpen your focus, and unwind more easily.
Product type: Capsule
Supply: 28 daily packs
Helps support relaxation without drowsiness
Supports focus and mental clarity
Helps ease occasional stress
Supports restful sleep
Free shipping on orders over $40.00
Vegan
Vegetarian
Non-GMO
Gluten-Free
Sesame Free
Soy Free
Dairy Free
Egg Free
Tree Nut Free
Peanut Free
Fish Free
Shellfish Free
Vegan
Vegetarian
Non-GMO
Gluten-Free
Sesame Free
Soy Free
Dairy Free
Egg Free
Tree Nut Free
Peanut Free
Fish Free
Shellfish Free
How VitaRx works
You’ll receive 28 customized daily vitamin packs containing a combination of vitamins you choose. There are 3 ways to create your packs:
What is L-theanine?
L-theanine is an amino acid found almost exclusively in tea leaves, particularly green tea. It's the compound most often credited with the distinctive calm, settled feeling many people associate with a cup of tea — a state researchers describe as relaxed alertness. Because the amount in a single cup is small, many people choose a supplement to get a more consistent daily amount.
How does L-theanine work?
L-theanine is absorbed in the small intestine and is able to cross the blood-brain barrier, where it interacts with the brain's signaling systems. It is structurally similar to glutamate, an excitatory messenger, and appears to modulate that activity while supporting the calming messenger GABA. In EEG studies, L-theanine has been associated with increased alpha brain wave activity.
Who should take L-theanine?
L-theanine is intended for healthy adults who want support for a calmer, more focused headspace — particularly during busy or demanding stretches. It's often chosen by people who want to feel settled without feeling sluggish, and by people who find it hard to wind down at the end of the day.
Can you take L-theanine daily?
Yes. L-theanine is well suited to daily use and is commonly taken as part of a consistent routine. It has been well tolerated in clinical research, including in studies of daily use over several weeks. As with any supplement, talk with your healthcare provider before starting — especially if you are pregnant, nursing, taking medication, or managing a health condition.
Benefits of daily use
L-theanine is best known for supporting a state of calm that doesn't come at the cost of alertness.
Helps support relaxation without drowsiness
L-theanine is associated with increased alpha brain wave activity, the pattern linked to a relaxed but wakeful state. This is what sets it apart from ingredients that promote calm by making you sleepy.
Supports focus and mental clarity
By helping support a settled mental state, L-theanine may make it easier to stay with a task instead of feeling scattered. Alpha wave activity plays a role in attention as well as relaxation.
Helps ease occasional stress
L-theanine has been studied for its role in helping the body and mind respond to everyday stressful moments, supporting a more even, composed feeling during demanding stretches.
Supports restful sleep
L-theanine may support better overall sleep quality and make it easier to wind down — not by sedating you, but by helping quiet a busy mind at the end of the day.
Pairs well with caffeine
L-theanine is frequently combined with caffeine because it may help smooth out the jittery edge some people feel from coffee or tea, while alertness is maintained.
Focused on the science
We choose to provide products that are supported by a growing collection of credible research. From the many studies about L-theanine detailed below; here are a few we found most relevant:
L-Theanine Reduces Psychological and Physiological Stress Responses
Biol Psychol. 2007 Jan;74(1):39-45. doi: 10.1016/j.biopsycho.2006.06.006.
Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial
Nutrients. 2019 Oct 3;11(10):2362. doi: 10.3390/nu11102362.
L-theanine, a natural constituent in tea, and its effect on mental state
Asia Pac J Clin Nutr. 2008;17 Suppl 1:167-168. PMID: 18296328.
Our L-theanine details
Our L-Theanine formula uses a clinically studied form of the amino acid, in a simple one-capsule serving.
Serving size
1 Vegetarian Capsule
Vegan
Vegetarian
Non-GMO
Gluten-Free
Sesame Free
Soy Free
Dairy Free
Egg Free
Tree Nut Free
Peanut Free
Fish Free
Shellfish Free
100mg of L-Theanine
See all ingredients on Supplement label
Why VitaRx's L-theanine is the right choice for you
We've teamed up with expert nutritionists to meticulously research every ingredient in our final product, ensuring we deliver top-quality supplements for your health.
Smarter formulas
Each of our vegetarian capsules contains 100 mg of L-Theanine — a clinically studied form of the amino acid. Our L-Theanine comes in capsule form, the most convenient way to take it on a daily basis.
Better ingredients
We pride ourselves on sourcing only the finest, most potent supplements. Our commitment to quality means we meticulously select products that contain non-irradiated components. This ensures that each vitamin pack delivers the purest and most effective nutrients to support your health.
Quality manufacturing
Our supplements are manufactured sustainably and encapsulated in the United States in a facility that adheres to U.S. FDA Good Manufacturing Practices (GMP) regulations and Natural Products Association (NPA).
All your L-theanine questions answered
Our library of expert-authored articles covers just about every question you might have about vitamins, minerals and supplements — along with some you might not have known you had.
Store your L-theanine away from sunlight and humidity to keep it effective. When you order from VitaRx, you will receive your L-Theanine in a dispenser box full of daily packs with all the other vitamins you need for the day. Keep it somewhere easily accessible so you remember to take them!
Either works, and it depends on your goal. Taken during the day it's chosen for calm, focused support; taken in the evening it's chosen to help wind down. The most important thing is picking a time you'll remember consistently.
L-theanine may support overall sleep quality and help you settle at the end of the day. It works by supporting a calmer state rather than by sedating you. It is not a sleep aid and is not intended to treat any sleep condition.
Yes. Our L-Theanine uses a vegetarian capsule and contains no animal-derived ingredients, making it suitable for both vegetarians and vegans.
It isn't intended to. L-theanine is associated with a relaxed but alert state — often described as calm without drowsiness — which is why many people take it during the day. Everyone responds differently, so pay attention to how it works for you.
Yes — the two occur together naturally in tea, and this is one of the most common pairings. Many people take L-theanine alongside their morning coffee to help take the edge off the jitters while staying alert.
Yes, L-theanine can generally be taken with or without food. If you find any supplement sits better with a meal, take it alongside food — with VitaRx, your daily pack is easiest to take at whatever mealtime you've built the habit around.
Capsules deliver a precise, consistent amount of L-theanine with no measuring or preparation. Getting a comparable amount from brewed tea would take several cups a day, along with the caffeine that comes with them. A capsule makes it simple to take the same amount at the same time each day.
Store your L-theanine away from sunlight and humidity to keep it effective. When you order from VitaRx, you will receive your L-Theanine in a dispenser box full of daily packs with all the other vitamins you need for the day. Keep it somewhere easily accessible so you remember to take them!
It isn't intended to. L-theanine is associated with a relaxed but alert state — often described as calm without drowsiness — which is why many people take it during the day. Everyone responds differently, so pay attention to how it works for you.
Either works, and it depends on your goal. Taken during the day it's chosen for calm, focused support; taken in the evening it's chosen to help wind down. The most important thing is picking a time you'll remember consistently.
Yes — the two occur together naturally in tea, and this is one of the most common pairings. Many people take L-theanine alongside their morning coffee to help take the edge off the jitters while staying alert.
L-theanine may support overall sleep quality and help you settle at the end of the day. It works by supporting a calmer state rather than by sedating you. It is not a sleep aid and is not intended to treat any sleep condition.
Yes, L-theanine can generally be taken with or without food. If you find any supplement sits better with a meal, take it alongside food — with VitaRx, your daily pack is easiest to take at whatever mealtime you've built the habit around.
Yes. Our L-Theanine uses a vegetarian capsule and contains no animal-derived ingredients, making it suitable for both vegetarians and vegans.
Capsules deliver a precise, consistent amount of L-theanine with no measuring or preparation. Getting a comparable amount from brewed tea would take several cups a day, along with the caffeine that comes with them. A capsule makes it simple to take the same amount at the same time each day.
Getting your L-Theanine intake is easy with VitaRx!
Here’s how it works with three easy steps
1
Design your own pack
Complete our quick 3-minute health quiz to discover your ideal vitamins and supplements, or browse our products to build your personalized pack!
2
We deliver to your home
Receive a monthly box every 30 days with your customized vitamin packs in a dispenser box. Plus, enjoy free shipping on most orders
3
Subscription with no contracts
You can easily change the vitamins and supplements in your subscription as your health needs change. No contracts. No commitments. No strings attached.
No contracts, no commitments, no hidden fees.
Frequently asked questions
Here are some general questions you may have about VitaRx and the packs we offer.
Yes! Well, unless you tell us to change it. We are going to send you the same personalized vitamin packs every month so that you don't miss a beat with your routine. But we also realize people’s needs change; feel free to change, pause, or cancel your vitamin packs at any time for no charge.
Place them somewhere you can easily see them! We will send you your vitamin packs in an awesome dispenser box that you can place anywhere in your house. Make it visible so you remember to grab a pack every day.
We will send you a new box every 30 days. However, if you need more time before your next shipment, you can always skip a month or delay the next order. We will email you a reminder before every shipment.
Nope, what you see in the checkout is what you will be charged. There are no cancellation fees of any type.
If you already know what you want, just browse our collection and add individual products to your cart. When you check out, those will be combined into one pack. Start by clicking the "Shop" button on the header of this page.
Yes — VitaRx is one of the best choices for men looking to take control of their health, energy, and performance through personalized supplements. Every man’s body is different, and VitaRx takes that seriously by offering custom daily vitamin packs tailored to your individual goals, lifestyle, and health needs.
Whether you’re focused on muscle recovery, testosterone support, heart health, mental focus, or simply maintaining overall wellness and vitality, VitaRx builds your plan using only high-quality, clinically backed ingredients.
With a simple online quiz, VitaRx helps identify the right blend of multivitamins, B-complex, omega-3s, zinc, magnesium, and probiotics — all key nutrients men need to stay active and healthy.
So if you’re asking, “Is VitaRx good for men?” — the answer is a clear yes. It’s a smart, convenient, and effective way to get personalized men’s health supplements that fit your unique body and goals.
Yes — VitaRx is one of the best choices for men looking to take control of their health, energy, and performance through personalized supplements. Every man’s body is different, and VitaRx takes that seriously by offering custom daily vitamin packs tailored to your individual goals, lifestyle, and health needs.
Whether you’re focused on muscle recovery, testosterone support, heart health, mental focus, or simply maintaining overall wellness and vitality, VitaRx builds your plan using only high-quality, clinically backed ingredients.
With a simple online quiz, VitaRx helps identify the right blend of multivitamins, B-complex, omega-3s, zinc, magnesium, and probiotics — all key nutrients men need to stay active and healthy.
So if you’re asking, “Is VitaRx good for men?” — the answer is a clear yes. It’s a smart, convenient, and effective way to get personalized men’s health supplements that fit your unique body and goals.
Absolutely — VitaRx is one of the best choices for women who want to take charge of their health, energy, and hormonal balance with personalized supplements designed just for them. Every woman’s body has unique needs, and VitaRx creates custom daily vitamin packs tailored to your specific goals, lifestyle, and wellness priorities.
Whether you’re focused on hair, skin, and nail health, hormone balance, stress management, immune support, or reproductive and bone health, VitaRx helps you build a plan using high-quality, research-backed ingredients.
Through a simple online quiz, VitaRx identifies the right mix of multivitamins, iron, calcium, omega-3s, B-complex, vitamin D, probiotics, and collagen — nutrients that support women’s energy, metabolism, and beauty from within.
So if you’re wondering, “Is VitaRx good for women?” — yes, it’s a trusted, convenient, and effective solution for personalized women’s health supplements that adapt to your unique body and wellness goals.
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Discover your personalized vitamin recommendations in just a few minutes.
Discover your personalized vitamin recommendations in just a few minutes.
