Caffeine + L-Theanine Caps

  • Focus & concentration booster
  • 100 mg caffeine & 100 mg L-theanine per capsule
  • For training & everyday life

90 zł 1,43 zł/kg, incl. VAT, excl. shipping

Unfortunately this is sold out. Enter your email to receive a notification when the product is back in stock.

Often bought together

Ultrapure Creatine Powder

High-quality micro creatine powder

From 76 zł

Ashwagandha Capsules Ashwa+

With patented Ashwagandha KSM-66®

108 zł

Athlete Stack: Men

Micronutrient stack for men

144 zł

Omega-3 Fish Oil Capsules

1,200 mg EPA & 900 mg DHA/serving⁴

From 77 zł

>76,000 5-star reviews
Lab-tested quality
Scientifically developed

Two active ingredients. One goal: focus.

Caffeine + L-Theanine deliver concentrated energy and mental clarity when you want to perform at your best.
L-Theanine from high-quality green tea extract
With 100 mg L-Theanine & 100 mg caffeine per capsule
Component of modern formulations for focused phases
In practical capsule form
Ideal for training & everyday life
Vegan

Für deinen Fortschritt entwickelt

Caffeine

A naturally occurring alkaloid found, among other things, in coffee beans, tea leaves and guarana. Alkaloids are nitrogen-containing, organic compounds of plant origin. It is known for its activating effect.

Independently lab-tested quality

ESN product batches are tested by the independent laboratories GBA (Gesellschaft für Bioanalytik) and IfP (Privates Institut für Produktqualität) for product safety and accurate ingredient information, among other things. The reports are available as PDFs.

  • 80,000+ tests per year
  • Developed by experts
  • FSSC 22000 & HACCP certified

Frequently bought together

Optimize your training with these combined products.

Total price:

90 zł

Our experts behind ESN

Nicolas Lother
Chief Product Officer
For us, quality isn’t a single step. It’s the sum of everything, from the first idea to the finished product.
Stefan Schwarz
Vice President Quality
Others rely on spot checks. We don’t. Because errors happen at random, we test every raw material and every batch in our in-house lab, without exception.
Dr. Mike O'Leary
Head of Product
A product can work as well as it likes, but if the taste isn’t right, it doesn’t make it into our range. For me, effect and enjoyment always go together.
Daniel Margis
Research & Innovation Scientist
For me, every formula starts with one question: what does current research really say? Only then do we decide on ingredients and dosage.
On the creation and review of our product reviews

All reviews that comply with our guidelines are published, regardless of whether they are positive or negative. Product reviews may only be submitted by persons who have purchased the product on esn.com and used it themselves. Reviews can only be submitted via a personal invitation sent by email.

Any questions?

Learn more about the product here.

Focus on your best – nothing less

Whether you're training, doing physical work, going through stressful times at work or studying - sometimes you just need that extra spark of focus to get the best out of a situation. And that's exactly why we developed Caffeine + L-Theanine Caps.

Use synergies, unleash your potential

In order to benefit from positive synergy effects, many people swear by the 1:1 ratio of caffeine and L-theanine. What can otherwise only be achieved with many cups of green tea and depends on many other factors, the Caffeine + L-Theanine capsules enable you to achieve quickly, easily and effectively.

Caffeine for the anti-fatigue effect

One serving (one capsule) provides you with 100 mg of caffeine and thus provides an anti-fatigue effect. In terms of structure, caffeine is similar to adenosine.

Keep in mind:Adenosine causes tiredness and relaxation in the human body when it docks onto its receptors. Due to the similar structure, caffeine temporarily binds to the adenosine receptors, leaving little to no room for adenosine. This suppresses your tiredness.

L-Theanine for the perfect synergy

One serving (one capsule) provides you with 100 mg of L-theanine from green tea extract, the same amount as caffeine, ensuring a 1:1 ratio. L-theanine acts as a synergist with caffeine and provides the effects you know from consuming 3 to 4 cups of perfectly prepared green tea - just without all the hassle and side effects like increased urination.

Anytime, anywhere, for everyone

Depending on your needs, you can take up to two servings (two capsules) daily - anytime, anywhere. Since we used a vegan capsule shell, the Caffeine + L-Theanine Caps are also suitable for vegans.

Increased caffeine content (200 mg / daily serving).Do not exceed the stated daily intake. Food supplements are not a substitute for a balanced and varied diet and healthy lifestyle. Store out of reach of youngchildren. Not suitable for children, pregnant and nursing women.

More suitable products for you

{"one"=>"{{ count }} Flavour", "other"=>"{{ count }} Flavours"}

{"one"=>"{{ count }} Flavour", "other"=>"{{ count }} Flavours"}

{"one"=>"{{ count }} Flavour", "other"=>"{{ count }} Flavours"}

{"one"=>"{{ count }} Flavour", "other"=>"{{ count }} Flavours"}

Discover more

Proteins

Vitamins & more

Performance

Food & Snacks

Sample sizes

Vegan

Clothing & Accessories