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Smart Caffeine®

Rated 4.7 out of 5
97 Ratings
Rated 4.7 out of 5
97 Ratings

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.

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Increased focus and alertness

Increased focus and alertness

Short-term memory support

Short-term memory support

No crash or jitters

No crash or jitters

Consistent, long-lasting energy

Consistent, long-lasting energy

Ingredients

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Caffeine is the world’s most popular natural cognitive enhancer. By using the purest form available, we are able maximize its positive effects on focus, alertness and energy. [12]

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L-Theanine is a naturally occurring amino acid with benefits that include mental relaxation, reduced stress, improved working memory, enhanced learning and increased alpha brain wave activity. [13]

Natural Caffeine

100 mg

Caffeine is the world’s most popular natural cognitive enhancer. By using the purest form available, we are able maximize its positive effects on focus, alertness and energy. [12]

L-Theanine from Green Tea

200 mg

L-Theanine is a naturally occurring amino acid with benefits that include mental relaxation, reduced stress, improved working memory, enhanced learning and increased alpha brain wave activity. [13]

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.

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How It Works

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]

Open Source

Most companies use "proprietary blends" so they don't have to tell you the amount of each ingredient in their formulas. At Natural Stacks we believe it's your right to know exactly what you're putting into your body. We proudly publish our innovative formulas and ingredient suppliers in an open source format.

Learn About Our Commitment To Transparency

Money Back Guarantee

If for whatever reason you're unsatisfied with your Natural Stacks products, you can return the product within 30 days for a full refund. We also provide actionable tips on our blog and newsletter for you to maximize your performance with our premium products.

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User Reviews

average rating 4.7 out of 5
Based on 97 ratings
  • 5 Stars
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95% of reviewers would recommend these products to a friend
Increased Energy
Rated 4 out of 5
Improved Concentration
Rated 3 out of 5
83 Reviews
Review posted
Rated 5 out of 5

Great stack with Ciltep

I love stacking Smart Caffeine with Ciltep. It keeps my energy and mental capacity steady for much of the day. I am absolutely loving the memory recall I get with this stack, its like I'm 20 again! Thank you!

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Increased Energy
Rated 5 out of 5
Improved Concentration
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Review posted
Rated 4 out of 5

Caffeine

Seemed to give energy without big let down afterwards

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Increased Energy
Rated 4 out of 5
Improved Concentration
Rated 3 out of 5
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Review posted
Rated 4 out of 5

I have definitely seen an improvement in my ability to focus

I am able to focus and finish tasks without being distracted as much

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Increased Energy
Rated 4 out of 5
Improved Concentration
Rated 4 out of 5
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Review posted
Rated 4 out of 5

Glad I took a chance

More energy more focus no side effects

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Increased Energy
Rated 4 out of 5
Improved Concentration
Rated 4 out of 5
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Review posted
Rated 5 out of 5

Focus and energy significantly increased

I have been using Smart Caffeine for 2 years now and I notice a major improvement with my energy and focus immediately. I will take it before exercise or before big tasks at work where I know I will be locked in for hours at a time.

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Increased Energy
Rated 5 out of 5
Improved Concentration
Rated 5 out of 5
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Citations & References

1. http://www.ncbi.nlm.nih.gov/pubmed/21040626

2. http://www.ncbi.nlm.nih.gov/pubmed/18641209

3. http://www.ncbi.nlm.nih.gov/pubmed/18681988

4. http://www.ncbi.nlm.nih.gov/pubmed/20079786

5. http://www.ncbi.nlm.nih.gov/pubmed/18254874

6. http://www.ncbi.nlm.nih.gov/m/pubmed/22285321/

7. http://jn.nutrition.org/content/138/8/1572S.lon

8. http://www.ncbi.nlm.nih.gov/pubmed/21040626

9. https://www.ncbi.nlm.nih.gov/m/pubmed/18681988/

10. http://www.ncbi.nlm.nih.gov/pubmed/20079786

11. http://www.ncbi.nlm.nih.gov/m/pubmed/22285321/

12. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2824625/?tool=pmcentrez

13. http://www.ncbi.nlm.nih.gov/pubmed/18841456

14. http://www.ncbi.nlm.nih.gov/pubmed/18641209

15. https://www.ncbi.nlm.nih.gov/pubmed/18254874

†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

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