Cafeine - Smart Caffeine

100% of 100
  • Caffeine with L-Theanine
  • No side effects from caffeine
  • Excellent in combination with Neurofuel™
  • Category: Brain & Energy
  • 60 capsules
Out of stock
EUR 26.35
  • Personal advice & shipping always within 12 hours!
  • Questions about this product? Call +3124 - 663 53 66 or chat with us

Smart Caffeine™ with L-Theanine by Natural Stacks

The product Smart Caffeine™ is a very effective combination of two substances: L-theanine and caffeine. The stimulating effects of caffeine are known to everyone. L-theanine is a natural amino acid found in green tea. However, it neutralizes the unwanted effects of caffeine. This means no irritable or restless sensations after ingestion and no dip that normally occurs after the caffeine has worn off. In short: the advantages, none of the disadvantages!


  • Effective combination of L-theanine and caffeine
  • No unwanted effects from caffeine
  • Contains no gluten or soy; GMO-free
  • Free from artificial additives and preservatives
  • Suitable for vegetarians and vegans

Caffeine in coffee and tea

Caffeine is consumed daily by hundreds of millions of people around the world. Significant amounts of caffeine are mainly found in hot drinks such as coffee and tea. Consumption of coffee and tea dates back thousands of years and is often related to social activities or performance enhancement. Unfortunately, not everyone can handle caffeine equally well. Too much caffeine can lead to unwanted side effects. That is why Natural Stacks developed Smart Caffeine™.

Paradox: opposite yet reinforcing

Caffeine and L-theanine have a somewhat paradoxical, opposite effect in mind and body. When the two substances are combined, you would expect the effects to cancel each other out. However, that turns out not to be the case. When used simultaneously, a synergistic effect is created. This way you can take advantage of the benefits of both ingredients without negative side effects.

3- to 6-hour effect

Thanks to Smart Caffeine™, the effects of caffeine can be fully exploited, while the sharp edges, or side effects, are softened by the L-theanine. This natural combination provides a focused form of energy, not the momentary rush experienced with caffeine alone. The effects of Smart Caffeine™ last between 3 and 6 hours on average. Smart Caffeine™ can be combined well with Neurofuel™.

About Natural Stacks

Better Brain. Better Life.® The mission of a company could not be clearer. Since 2013, Natural Stacks has been offering a superior line of supplements specifically aimed at the proper functioning of the brain. Nootropics, as these products are also called, target areas ranging from energy, sleep, focus, and memory to mood. Natural Stacks uses only the best natural ingredients in its products. Composition and origin are completely open source, and ingredients are verbosely spelled out on the label. All products are tested by independent laboratory Intertek for quality, purity and potency.

More Information
Product Name
Cafeine - Smart Caffeine
Natural Stacks
60 capsules
User Instructions
Take 1-2 capsules per day. Do not exceed the recommended dosage. Avoid use after 18:00.
Ingredients per Serving
100 mg of caffeine anhydrous †, 200 mg of L-theanine †. † Recommended Daily Intake not established.
EU Norm
*RDA = Recommended Daily Allowance
Other Ingredients
Vegetable cellulose (capsule), vegetable magnesium stearate.
Storage: see label. Keep out of the reach of children. Consult an expert before use in case of pregnancy, breastfeeding, illness or medication.
Write Your Own Review
You're reviewing:Cafeine - Smart Caffeine
Your Rating
Customer Reviews
  1. Really good
    Overall rating
    This product really works and help me to get extra energy
    and laser focus. Thanks to l-theanine I get the benefits of caffeine without the side effects (nervosity, jitters).

    I highly recommend this product before an intense workout or an intense day at work.

    Review by

    Posted on

Other customers also viewed: