Smart Caffeine

Buy Smart Caffeine by Natural Stacks

Smart Caffeine is a highly effective combination of L-theanine and Caffeine. L-theanine is a natural amino acid found in green tea that removes the undesirable side effects of caffeine, creating long-lasting energy and attention without jitters, anxiety, or a crash.

The benefits include:

  • Increased focus and alertness

  • Improved cognitive function

  • Enhanced short-term memory retention

  • More ability to ignore distractions

  • No overstimulation

Smart Caffeine creates a relaxed yet alert state that is ideal for focusing and thinking clearly.

Smart Caffeine by Natural Stacks

Smart Caffeine is mild enough that it can be taken every day, but also provides a significant boost in mood and energy.


Smart Caffeine by Natural Stacks is one of my favorite stacks that I use on a regular basis. I have been using it with Ciltep for over a year and consider these to be the best nootropic stacks for me.

Suggested Use: take a serving of 1-2 capsules whenever focused energy is desired. Avoid use in the evening. Total daily dosage should not exceed 6 capsules.

SMART CAFFEINE™ can be taken daily, however we advise taking 1-2 days off per week (weekends for example).

U.S.A manufactured in a GMP facility. Natural Stacks proudly uses only the highest quality ingredients.

Being tired or drained is simply not fun, especially if you want your brain working at its highest performance level.

That’s why caffeine is consumed by millions worldwide. It’s an efficient natural stimulant that is well tolerated by many people, and Caffeine can definitely give you a nice edge on your energy levels. Numerous studies have shown that Caffeine supplements increase energy and concentration. [1]

But it’s not the type of energy and concentration you want for productivity.

On its own, Caffeine is not a great cognitive enhancer. Users often experience a jittery or anxious mental state followed by a crash, especially in people that have built up a tolerance. Drinking a sugary coffee or energy drink doesn’t provide the type of energy and concentration you need to get things done. That’s why we include L-theanine (L-tay ah neen) in SMART CAFFEINE™. It’s a naturally occurring amino acid with benefits that include mental relaxation, reduced stress, improved working memory, enhanced learning, and perhaps most importantly, increased alpha brain wave activity. [2]

Independently, Caffeine and L-Theanine have somewhat polar effects on the mind and body. However when the two are combined the effects do not simply negate one another. Instead they work together very synergistically, allowing the user to fully benefit from the positive aspects of both compounds without the negative side effects. The energy and motivation from the Caffeine is harnessed and smoothed over with L-theanine.

This Natural Stack provides a clear and focused energy feeling, rather than the short-lived stimulant rush of Caffeine by itself.

Many scientific studies have shown that SMART CAFFEINE’s ingredients, Caffeine and L-theanine, have the following benefits when taken together; increased focus and alertness [3], improved cognitive function [4], enhanced short-term memory retention [5], more ability to ignore distractions [6], no overstimulation [7].

Quick Facts:

L-theanine and Caffeine is the #1 recommended beginner’s Nootropic stack at the excellent r/Nootropics community on
L-theanine (y-glutamylethylamide) is found almost exclusively in the tea plant. Some teas have more than others. The average green tea drinker consumes about 20 mg of L-theanine a day. That’s why people may feel relaxed, calm, and focused after drinking several cups of tea. However you would have to drink many cups of tea to reach most desired nootropic effects of L-theanine.


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