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20 Best Powder City Caffeine And Theanine Capsules of 2023 – Romance University

After hours researching and comparing all models on the market, Romance University finds out the Best Powder City Caffeine And Theanine Capsules of 2023. Check our ranking below.

2,915 Reviews Scanned

SaleRank No. #1

Nutricost Caffeine with L-Theanine, 100mg of Each, 240 Capsules, 240 Servings - Non-GMO and Gluten Free

Balanced Combination: Each serving of Nutricost Caffeine with L-Theanine delivers 100 mg of caffeine and 100 mg of L-theanine, providing a harmonious blend of these two ingredients.
Versatile Use: Nutricost Caffeine with L-Theanine can be easily incorporated into your daily routine, whether you need a boost of energy, enhanced focus, or a sense of calm and relaxation.
Abundant Supply: The 240 capsules in each bottle offer a total of 240 servings, ensuring you have an ample supply of this beneficial supplement.
High-Quality Manufacturing: This product is manufactured in an NSF certified and GMP compliant facility, ensuring the highest standards of quality and purity.
Rigorous Testing: To guarantee the integrity of the product, each batch undergoes independent testing by third-party, ISO accredited laboratories.

Rank No. #2

Sports Research L-Theanine Supplement with Caffeine & Coconut MCT Oil - Focused Energy, Alertness & Relaxation Without Drowsiness - 200mg L Theanine, 100mg Organic Caffeine - 60 Liquid Softgels

2-IN-1 SUPPORT: Sports Research L-theanine and Caffeine can help boost mental focus and alertness while promoting wakefulness. Our nootropic stack also supports cognitive and physical productivity, so it's great for studying or working out in the gym.*
CLEAN ENERGY: Just one of our liquid softgels provides 200mg of l theanine with 100mg of organic caffeine + coconut MCT oil for a convenient & economical alternative to sugary energy drinks and coffee.
BETTER INGREDIENTS: Our keto certified caffeine with l theanine supplement for men and women contains Alphawave - a highly purified and standardized brand of l theanine and PurCaf Caffeine - sourced from organic green coffee beans.
PREMIUM QUALITY: We hold all of our supplements to a higher standard. Rest assured that your L-Theanine + Caffeine is crafted using non-GMO verified ingredients with no fillers, gluten, or seed oils. Manufactured in the USA in a cGMP-compliant facility.
THE SPORTS RESEARCH DIFFERENCE: Founded in Southern California in 1980, Sports Research is a family-owned business born from a passion for fitness and wellness. Our goal is to embrace the sport of life through research-backed products created for every body—inside and out.

Rank No. #3

FAST-ACTING ENERGY AND FOCUS - This powerful nootropic blend helps boost mental focus and alterness while also promoting wakefulness. This supports mental and physical productivity and is great for studying or even working out!
NO CRASH NO JITTERS. CALM CLEAN ENERGY - Caffeine + L-theanine pills are a safe, convenient & economic alternative to sugary coffee and energy drinks to help you get through your work day.
STANDARDIZATION - Many companies lack the quality controls & testing capabilities to ensure customers are receiving products which meet their expectations. At Nootropics Depot, our Caffeine + L-Theanine is standardized in both 100mg of Caffeine and 200mg of L-Theanine as well as 200mg of Caffeine and 100mg of L-Theanine. We then verify this using our industry leading laboratory so you can be ensured that you are getting exactly what you see and what you pay for.
LAB TESTED AND VERIFIED - All Nootropics Depot products are thoroughly lab tested to ensure our customers are receiving only the highest quality ingredients at the optimal strength, potency and purity. We take pride in the amount of research put into every product by sourcing only the highest quality and innovative ingredients.

Rank No. #4

L Theanine Supplement - Promotes Relaxation, Sleep & Calm Support - L Theanine 400 mg Extra Strength - Made in USA - Focus Supplements - for Men & Women - Non-GMO & Gluten-Free - 120 Vegan Capsules

100% Natural Source — L Theanine effectively relaxes and relieves mental and physical tension. It has a natural ability to deal with nervousness and stress-related sleep problems. Found and made from the purest, highest quality green tea!
L-Theanine Supplement — Don’t stress, sleep well & do your best! Provides calming & relaxing effect on the body, supports good sleep, and the ability to deal with stress.
Calm, Sleep & Relax — L theanine works by encouraging brain-wave activity, which improves concentration by reducing distractions and promoting a more focused state of mind.
Made in the USA — L theanine from NUTRAHARMONY does not contain GMOs; it's dairy-free, gluten-free, nut-free, wheat-free, soy-free, nightshade-free, and sugar-free. L-theanine is a perfect addition to your gluten-free & vegan lifestyle with advanced support and significant effects
Quality Matters — NUTRAHARMONY ltheanine vitamin is an excellent and effortless choice for improving your health. If you want to share your experience or have questions about l- theanine, message us. Our support team works 24/7. Maintain your health anytime, anywhere with a ltheanine supplement!

Rank No. #5

NutraBio 100% Pure Caffeine Capsules (250 Capsules)

INCREASE FOCUS AND ENERGY – Caffeine works by stimulating your nervous system, increasing energy, alertness, and reducing the effects of fatigue. This helps you stay awake and be productive. Caffeine is also effective when taken pre-workout.
BOOST THERMOGENESIS – Caffeine is a light thermogenic and can aid in weight loss by burning fat and boosting your metabolism. Men and women can use caffeine to help reduce fat.
100% PURE CAFFEINE – NutraBio uses 100% pure USP grade caffeine anhydrous. Every lot is verified by a third party lab with HPLC testing for purity and safety. This is the highest standard to which a product can be held, meaning you won’t find a higher quality caffeine.
WITHOUT COMPROMISE - NutraBio uses only the best, and this product is no exception. Our Caffeine is gluten free, soy free, vegetarian, third-party tested, certified kosher, non-GMO, and made in the USA.
FREE OF FILLERS – NutraBio uses a manual encapsulation process which enables us to forgo the fillers and fluff. Our capsules contain nothing but the ingredients you want, and nothing that you don’t.

SaleRank No. #6

VALI Caffeine 50mg & L Theanine 100mg - Caffeine Pills & L-Theanine for Smart Smooth Energy & Focus Supplement. Nootropic Brain Booster Cognitive Support Stack & Focused Clarity. 120 Veggie Capsules

Health, Happiness & Performance - We started VALI because we want to know exactly what’s inside our supplements and we want supplements that give real results without the marketing fluff other companies use to charge exorbitant prices. Nothing proprietary, clean highest quality ingredients at a great value, transparent formula, 3rd party testing for purity, and a commitment to above and beyond customer service. This is our promise to you! ALL our products come with a 100% money back guarantee.
Smooth Focused Energy, In Your Control - This isn’t your normal caffeine pill that gives too much fast jittery energy and then leaves you crashing. Caffeine and the amino acid L-Theanine work together as a smart nootropic stack to support energy, alertness, and clear focus. Our supplement provides 50mg caffeine and 100mg L-Theanine per capsule to give you an energy supplement that you control. Why take 100mg or 200mg caffeinated pills when you can energize with a smarter low dose active boost?
Safe, Clean & Transparent Formula - Unflavored capsules for easy to take energy and focus on the go without mixing powders. Get 50 milligrams of energizing caffeine anhydrous and 100 mg of calming L Theanine for the best quick mind boost. Take 2 tablets for extra strength or use as a daily brain booster. Zero carbs, sugar, artificial flavors or preservatives. Vegan, Non-GMO ingredients. Keto & paleo friendly. Proudly made in the USA in an eco-friendly facility under the latest cGMP guidelines.
Easy On-The-Go Cognitive Support - A commonly used advanced cognition health and function support for adult men and women, get the original best nootropic supplement stack for boosting calm productivity at work, focused but energized studying, deep thinking, and creative genius. Also great for endurance workouts, sports, or for an exercise energy booster. Promotes energy day or night, to stay alert without the high jitters or caffeine crash from standard energy pills, chews, gum or tablets.
Crush Your Health & Work Goals - Drop unhealthy sugary energy drinks for a smarter and healthier fast acting alternative mind boosting cognition support with no powdered mess. For concentration and productivity, feel a natural calm awake feeling during the day to get stuff done. Strive for optimal and elite peak physical performance with a relaxed sharp focus. Take anywhere portable smart energy enhancer to stay alert, maintain endurance, and stimulate activity, so you can achieve more.

Rank No. #7

FAST-ACTING ENERGY AND FOCUS - This powerful nootropic blend helps boost mental focus and alterness while also promoting wakefulness. This supports mental and physical productivity and is great for studying or even working out!
NO CRASH NO JITTERS. CALM CLEAN ENERGY - Caffeine + L-theanine pills are a safe, convenient & economic alternative to sugary coffee and energy drinks to help you get through your work day.
STANDARDIZATION - Many companies lack the quality controls & testing capabilities to ensure customers are receiving products which meet their expectations. At Nootropics Depot, our Caffeine + L-Theanine is standardized in both 100mg of Caffeine and 200mg of L-Theanine as well as 200mg of Caffeine and 100mg of L-Theanine. We then verify this using our industry leading laboratory so you can be ensured that you are getting exactly what you see and what you pay for.
LAB TESTED AND VERIFIED - All Nootropics Depot products are thoroughly lab tested to ensure our customers are receiving only the highest quality ingredients at the optimal strength, potency and purity. We take pride in the amount of research put into every product by sourcing only the highest quality and innovative ingredients.

Rank No. #8

Pure L-Theanine Powder, 100 Grams (1 Year Supply), Filler Free, No GMOs and Vegan Friendly

Micro Ingredients L-Theanine Supplements, 100 Grams (1 Year Supply), Filler Free, No GMOs and Vegan Friendly.
No Additives, No Preservatives, No Fillers, No GMOs, No Artificial Colors, No Soy and No Gluten
Scoop included to get the measurement every time. Take it daily with or between meals by adding it to a shake or smoothie, see what the most nutrient dense food on the planet is all about.
Powder lover? Take it naturally in powder for higher concentration, quicker absorption, easier on the stomach, and more ways to have fun.

Rank No. #9

Elite Caffeine Pills with L-Theanine – Jitter-Free Focused Energy Supplements – Clean & Natural Nootropic Stack for Smart Cognitive Performance – 120 Soft Capsules

FOCUS & LASTING ENERGY: Caffeine L Theanine pills create a nootropic stack formulated for smooth focused energy and clinically researched to provide clean energy and lasting endurance
NO JITTERS: Caffeine and L Theanine are super ingredients with no jitters or crash, so you can power through workouts, studies, and activities without the negative effects of regular caffeine. An easy replacement for sugary coffee and energy drinks
POTENT BLEND: Each two-capsule serving provides a potent, clinically validated blend of 100 mg Caffeine and 200 mg L Theanine for optimal results
EFFECTIVE & EASY TO SWALLOW: Pure natural Caffeine L Theanine formula in easy-to-swallow soft capsules. Effective energy pills for men & women that are completely free of fillers, binders, and artificial ingredients. No gluten, wheat, or dairy. And of course, never tested on animals. Just a pure and tested product
100% HAPPINESS & HEALTH COMMITMENT: Try our products without worry, we're confident that you’ll see results. Plus, through our partnership with Vitamin Angels, your purchase helps provide vitamins to underserved women and children at risk for malnutrition

SaleRank No. #10

Nutricost L-Theanine 200mg, 120 Capsules, Double Strength - Non-GMO, Gluten Free

120 Capsules of L-Theanine Per Bottle
200mg L-Theanine Per Serving (120 Servings)
Easy To Take Capsules
Non-GMO, Gluten Free
Manufactured In a GMP Compliant, FDA Registered Facility

Rank No. #11

FitPowders L-Theanine Powder 100% Pure, Non-GMO, Vegan, Gluten Free Theanine Powder Supplement (Multiple Sizes) Mood and Cognitive, Stress Relief and Relaxation, Scoop Included (100 Grams)

🥄 SCOOP INCLUDED: Easily measure the recommended 200mg L-theanine dosage with the included anti-static 1/8 teaspoon (tsp) scoop.
🧪 THIRD-PARTY LAB TESTED: Tested by an independent US lab separate from the manufacturer to guarantee purity and quality control.
☀️ MOOD, RELAXATION, COGNITION: L-theanine promotes mood health while enhancing relaxation and cognition. It supports a positive mood, allowing you to enjoy your day to its fullest.
☕ GOES GREAT WITH CAFFEINE: Eliminate caffeine jitters and increase focus by taking a 2:1 ratio of L-theanine to caffeine. This makes an excellent partner for coffee or caffeine supplements. Add one scoop (theanine 200mg) of theanine supplement to your coffee (about 100mg of caffeine). Or take L-theanine 100 mg with a 50 mg caffeine pill. For caffeine pills, mix a scoop of theanine powder with water or juice, or just have it dry and enjoy its natural slightly sweet, umami taste.
✔️ 100% PURE L-THEANINE: No fillers, additives, artificial colors, or flavors. Just pure L-theanine powder packaged in a GMP-compliant, FDA-registered facility. FitPowders L-theanine is also gluten-free, non-GMO and vegan.

Rank No. #12

BulkSupplements.com L-Theanine Powder - L-Theanine Supplement, L-Theanine 200mg - Amino Amino Supplement, Pure & Gluten Free, 200mg per Serving, 100g (3.5 oz) (Pack of 1)

Elevate Your General Health and Well-being: Tailored to support your overall health, our L-Theanine powder, in L-Theanine 200mg, is the perfect addition to any lifestyle. Packed with essential nutrients, they're designed to boost your general well-being, keeping you feeling your best day after day.
Versatility for all Lifestyles: Whether you're someone simply looking to stay healthy, our L-Theanine supplement, in Theanine powder, fits seamlessly into your regimen, adaptable to a wide range of dietary needs and preferences.
Optimized in every Serving: Our L-Theanine 200mg powder is unflavored and free of unnecessary allergens, offering you a high-quality product that easily integrates with other supplements or your preferred shake or beverage.
Transparent and Trustworthy: Experience the confidence that comes with choosing a supplement that not only meets rigorous third-party testing but also upholds the principles of clarity and integrity in its formulation and production.
Commitment to Excellence: Produced in a facility compliant with strict cGMP standards, our L-Theanine powder, or Theanine 200mg supplement, stands as a testament to our dedication to quality. You can trust in our product's consistency and excellence, batch after batch.

SaleRank No. #13

Nature Made Wellblends Stress Relief Gummies, L theanine 200mg to Help Reduce Stress, with GABA 100mg, Same Day Stress Support, 40 Strawberry Flavor Gummies

STRESS BLEND WITH RESULTS YOU CAN FEEL(2): Nature Made Wellblends Stress Relief Gummies (40 count) provide 2 benefits in 1 blend for same day stress support
DE-STRESS BLEND OF L THEANINE 200MG & GABA 100 MG: Help reduce stress with L theanine and help support a calm and relaxed mental state with GABA
WORKS WITHIN 1 HOUR: This gluten-free stress relief supplement is 100% drug-free and non habit forming; Adults, chew 2 gummies as needed; Works within 30 to 60 minutes
HIGH QUALITY INGREDIENTS: Gluten free, no high fructose corn syrup, no artificial flavors, no synthetic dyes, no artificial sweeteners; Delicious Strawberry flavored gummies
SCIENCE-BACKED SOLUTIONS YOU CAN TRUST: Blended by Nature Made, powered by science(1)

Rank No. #14

Natural Stacks Smart Caffeine Supplement 60ct - Instant Energy and Focus for Life School & Work - No Jitters and No Crash - Premium Sourced 100mg Caffeine from Coffee + 200mg L-Theanine from Green Tea

💡ALERT FOCUS AND PRODUCTIVITY: Take this Smart Caffeine Supplement with L-theanine for when you need alert focus and long lasting energy. We blended 100 mg of the purest form of Natural Caffeine with 200mg mg of L-Theanine from Green Tea to get the best of both worlds.
🚫 NO JITTERS OR CAFFEINE CRASH: Unlike the 200mg caffeine pills that make you jittery and anxious, Smart Caffeine is a calm and smooth energy pill. No more staying up late, wired up from your last cup of coffee too many.
☀️ START YOUR DAY OFF STRONG: Add Smart Caffeine to your morning routine or anytime of day as a study aid, pre-workout or whenever your energy needs a lift. Perfect as a coffee or energy drink replacement.
🌿HEALTHY AND SAFE: Our all natural ingredients are Non-GMO, gluten free, and vegan. Every ingredient can be traced directly to trusted suppliers.
Natural Stacks has earned the trust of thousands of customers with our innovative products and open source transparency program. No more “proprietary blends”, we believe in optimizing your performance without compromising on ingredient quality.

Rank No. #15

Nutricost Caffeine Pills, 200mg Per Serving (500 Caps)

200mg of Caffeine Per Capsule
Get Caffeine Without the Added Sugar or Calories Found In Energy Drinks
1 Serving: Just 1 Capsule, Do Not Exceed 2 Capsules In a 24Hr Period
Non-GMO, Gluten Free, Sugar Free
Made in a GMP Compliant, FDA Registered Facility

Rank No. #16

Custom Party Shop Unisex Baby's Be Mine Valentine Onepiece 12-18 Months Red and Pink

Valentines Day Bodysuit in 12-18 Months
Great baby shower gift idea for newborn baby boy or baby girl.
Prints are super soft and professionaly applied to the fabric. You can't feel the print on the fabric keeping the fabric soft and comfortable. These prints are not an iron on transfer, which means it doesn't crack or peel. This outfit will continue to feel and look great even after many washes.
Valentines Day short sleeve baby boy or girl one piece outfit. Lap sleeve neckline for easy over-the-head changes.
Professionally designed apparel by Custom Party Shop. We carry clothing for newborn boys and girls as well as first birthday party outfits.

SaleRank No. #17

L-Theanine 200mg Capsules | Double-Strength L-Theanine Liquid with Vitamin D3, Organic Coconut Oil | Supports Mood, Focus, Stress Relief | L-Theanine for Kids & Adults | 60 Vegan Capsules (2 Pack)

Relaxation & Focus - L-Theanine promotes relaxation without drowsiness. Great for helping eliminate daily stresses or unwinding after a long day, this nutrient has been clinically shown to relax the body while also enhancing focus & clarity of mind.
Fast-Acting Vegan Liquid Capsule - Our L-Theanine is made with organic virgin coconut oil for maximum absorption - and is the world's first vegan liquid cap with zero animal gelatin! Because when you need a calm and clear mind, you need it fast.
Enhanced Benefits with Vitamin D3 - Studies show that D3, “the sunshine vitamin”, can improve mood. Together with L-Theanine, you have the perfect duo to be healthy & happy, as they work in harmony to reduce stress while improving positivity & sleep.
The Nutrient Found in Green Tea - Since ancient times, it has been said that drinking green tea soothes stress and helps the body relax. Clinical studies show that the amino acid L Theanine found in green tea leaves is responsible for these benefits.
Double-Strength 200mg per Capsule - Vegan | Non-GMO | Gluten-Free | Soy-Free | Made with Organic Ingredients | Lab-Tested & Verified | Made in USA | No Artificial Fillers or Coloring

Rank No. #18

Nutricost Caffeine Pills 100mg Per Serving, 250 Capsules

Energize Your Day: Nutricost Caffeine Capsules deliver a boost of energy to help you stay focused and alert throughout the day.
No Sugar or Unhealthy Additives: Enjoy the benefits of caffeine without the unwanted sugar or other unhealthy additives commonly found in sodas or energy drinks.
Convenient and Effective Capsule Formulation: Each bottle contains 250 capsules, making it easy to take your desired caffeine dose on the go.
Rigorous Quality Standards: Every Nutricost product is made in an NSF certified, GMP compliant facility, ensuring the highest level of quality and purity.
Third-Party Tested: Every batch of Nutricost Caffeine Capsules is independently tested by ISO accredited laboratories, providing reassurance and confidence in the product's quality and consistency.

Rank No. #19

VitaMonk L Theanine 400mg Supplement - L-Theanine 400mg with No Artificial Fillers - Extra Strength L Theanine Supplement - Ltheanine 60 Capsules

We've developed a premium-quality Theanine supplement that contains an extra-large dose of 400mg per serving. These are 2x most other l Theanine 200mg capsules and 4x other l Theanine 100 mg capsules on the market.
Theanine is an Amino Acid found in tea leaves, particularly in green tea. It's been used for centuries to help people relax, reduce stress, and promote a sense of calm.
One of the key benefits of L-Theanine is its ability to promote relaxation and reduce stress. Cortisol is a hormone that is released in response to stress. Studies have shown that L-Theanine powder can help to maintain cortisol levels within normal range. L-Theanine can help to promote relaxation and calmness, without causing drowsiness.
Another benefit of Theanine is its ability to improve cognitive function and mental clarity. Theanine has been shown to increase alpha brain waves, which are associated with creativity, focus, and mental alertness. It's also been shown to improve memory and learning ability, making it a great choice for students or professionals who need to be at their best mentally.
At our company, we're committed to using only the highest quality, all-natural ingredients in our supplements. Our Theanine supplement is no exception. We use only non-GMO ingredients, and our capsules are easy to swallow and ensure efficient absorption. Our supplement is also third-party tested, so you can be sure you're getting a safe and effective product.

Rank No. #20

Vitamatic L-Theanine 200mg with Caffeine 100mg 120 Vegetarian Tablets - Nootropic Supplement for Focused Energy

Boosts Energy & Mental Focus*
Sports Nutrition Endurance & Energy
Non-GMO & Gluten Free
Free of sugar, starch, sodium, soy, yeast, corn, wheat, egg, artificial color, flavor & preservatives.
Made in a the USA GMP Compliant, FDA Registered Facility

Last update on 2023-08-11 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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FAQ:

Q: What are caffeine L-theanine capsules?

A: In addition to this, these Caffeine L-theanine capsules contain 200 mg of a unique amino acid found in green tea called L-Theanine. In Japan, L-Theanine is highly regarded for its ability to support healthy stress levels and in the Western world, L-Theanine is now highly regarded for its ability to work synergistically with caffeine.

Q: Is L-theanine safe to take?

A: L-theanine is approved as generally regarded as safe (GRAS) by the Food and Drug Administration (FDA) [8]. In addition, the FDA has suggested that the daily amount of L-theanine should not exceed 1200mg. Coming soon… Jackson Williams, Jane Kellett, Paul Daniel Roach, Andrew McKune, Duane Mellor, Jasckson Thomas and Nenad Naumovski, 2016.

Q: Can L-theanine and caffeine improve attention?

A: Research has consistently used L-theanine and caffeine in low, moderate and high doses. In this manner, it has been shown that 100mg L-theanine stacked with 50mg caffeine has positive outcomes on attention [15]. L-theanine is approved as generally regarded as safe (GRAS) by the Food and Drug Administration (FDA) [8].

Q: Does L-theanine help with depression?

A: In a more recent study assessing the effect of L-theanine on patients with depression, L-theanine – in a 250mg/day dose administered over 8 weeks – showed a beneficial outcome in depressive symptoms: anxiety, sleep disturbance and cognitive impairment in all patients [9].