Smart Caffeine®

$27.95
Rated 4.8 out of 5
Based on 180 reviews

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.

Creates a relaxed yet alert state that is ideal for focusing and thinking clearly.

 


The World’s First Open-Source Supplement Company

Natural Stacks “Open Source” transparency program provides ingredient traceability and 3rd party lab test results for every batch. It’s powered by blockchain technology and secured by HealthLoq™ for transparent, tamperproof, trusted data. 

LEARN ABOUT OUR COMMITMENT TO TRANSPARENCY

01/ Caffeine and L-Theanine for Clean Energy and No Crash

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 is a natural nootropic stack made from coffee and green tea to support a relaxed but alert state that is ideal for productive, focused activity - mental or physical.

The energy and motivation from the Caffeine is harnessed and smoothed over with L-theanine. The result is a focused energy state with improved cognitive function [14] that’s perfect for creative or analytical work. Best of all, there’s no jitters, no crash and no anxious feelings. [15]

Thousands of people use Smart Caffeine every day as a study aid, pre-workout, energy drink replacement or whenever they need a lift.

There have been many recent clinical trials conducted by various organizations proving that the combination of L-Theanine and Caffeine in our same 2:1 ratio increases the ability to focus without the over stimulating effects of Caffeine alone:

A recent study from The Netherlands confirmed that "The combination of L-Theanine and Caffeine improves the cognitive performance and increases subject alertness." and that the combination "helps to focus attention during a demanding cognitive task." [1]

The Cognitive Neurophysiology Laboratory in New York conducted testing for 4 days on volunteers from the age of 21 and 40 and found that L-Theanine and Caffeine in combination positively affect human cognition and caused measurable increases in alpha brain waves - the brain waves associated with alertness. [2]

A UK-based study published in Nutritional Neuroscience found that the combination of L-Theanine and caffeine improved both speed and accuracy of performance when switching between tasks (multi-tasking) and reduced susceptibility to distractions during a memory task. The researchers summarized: "These results replicate previous evidence which suggests that L-Theanine and caffeine in combination are beneficial for improving performance on cognitively demanding tasks." [3]

A Dutch study gave participants L-Theanine and caffeine in the same 2:1 ratio that Smart Caffeine contains, the asked the participants to complete 2 attention tasks at 10 and 60-minutes after ingestions. The researchers stated that "The results support previous evidence that L-theanine and caffeine in combination can improve attention." [4]

A review of multiple studies published by the School of Psychology in Australia concluded that "L-theanine may interact with caffeine to enhance performance in terms of attention switching and the ability to ignore distraction; this is likely to be reflective of higher-level cognitive activity." [5]

New research from Korea has shown the amino acid L-Theanine (commonly found in tea) inhibits the excitatory effects of caffeine (you'll be less jittery) and "low doses of L-theanine can partially reverse caffeine-induced reductions in Slow Wave Sleep (the transition from wakefulness to sleep); however, effects of L-theanine on caffeine-induced insomnia do not appear to increase dose-dependently."

L-Theanine can reduce jittery effects of caffeine and helps prevent sleeplessness caused by caffeine consumption. [6]

Another study from neuroscience labs here in the US found that L-Theanine in combination with caffeine had positive effects on both tonic (background) and phasic (event-related) cognition.

In this study, participants were dosed placebo, caffeine only and caffeine + L-Theanine. The participants that received the combination of caffeine + L-Theanine demonstrated significantly greater increases in mental performance than both the caffeine-only and the placebo groups. [7]

03/ 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.

100% Happiness Guarantee

If for whatever reason you're unsatisfied with your Natural Stacks supplements, you can keep the full bottle on us and we'll refund your money. Anything after the first bottle, we'll ask that you return for a refund.

average rating 4.8 out of 5
Based on 180 reviews
  • 5 Stars
    152 Reviews
  • 4 Stars
    28 Reviews
  • 3 Stars
    0 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
100% of reviewers would recommend this product to a friend
Increased Energy
Rated 4 out of 5
Improved Concentration
Rated 4 out of 5
180 Reviews
Reviewed by lance b.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

smart caffeine, best caffeine

The smart caffeine is great. I was using energy drinks that had all sort of preservatives and artificial ingredients. Now I am off of those and enjoying the focused energy I get from Natural Stacks Smart caffeine!

Loading...
Was this helpful?
Reviewed by Sandra F.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Smart Caffeine

I love this product. I work 12 hour night shifts. It delivers a focused and even energy throughout the night. It also has a calming serene effect on the brain at the same time. It keeps my stress in check and keeps me awake.

Loading...
Was this helpful?
Reviewed by Carl P., from United States
Verified Buyer
I recommend this product
My Age
45 - 54
My Regular Dosage
2 Capsules
Results
  • Increased Energy
  • No Crash
  • No Jitters
Rated 5 out of 5
Review posted

Never fails!

I have been using Smart Caffeine for a number of years now and can’t recommend it enough! Simply put, if you are looking for a sustainable, non jittery, energy throughout the day I would purchase this product. I take two in the morning with three Ciltep and the focus, clarity of thought and recall I get is profound.

Loading...
Increased Energy
Rated 5 out of 5
Improved Concentration
Rated 5 out of 5
Was this helpful?
Reviewed by Josh H., from United States
Verified Buyer
I recommend this product
My Age
25 - 34
My Regular Dosage
2 Capsules
Results
  • Increased Energy
  • No Jitters
Rated 5 out of 5
Review posted

Exceptional Product

These guys are the tried and true kings of the supplement industry. Never been disappointed, nor do I believe I will be in the future. Would give 10 stars if I could.

Loading...
Increased Energy
Rated 4 out of 5
Improved Concentration
Rated 5 out of 5
Was this helpful?
Reviewed by Jason C., from United States
Verified Buyer
I recommend this product
My Age
35 - 44
My Regular Dosage
1 Capsule
Results
  • Increased Energy
  • No Crash
  • No Jitters
Rated 5 out of 5
Review posted

Great Mental Lift

I use these on an as-needed basis. When I'm really wiped or haven't slept enough the night before, I'll take one capsule and it really helps bring me "up" without it being a jittery crazy boost. It's smooth and level and helps get me through the afternoon.

Loading...
Increased Energy
Rated 4 out of 5
Improved Concentration
Rated 4 out of 5
Was this helpful?