Bottle of NeuroFuel and Smart Caffeine supplements displayed side by side.
Supplement bottle labeled 'Smart Caffeine' next to a glass mug filled with capsules on a reflective surface.
Bottle of NeuroFuel with capsules on a transparent stand with a yellow background
Smart Caffeine and NeuroFuel supplement facts labels.
Bottle of NeuroFuel and Smart Caffeine supplements displayed side by side.
Supplement bottle labeled 'Smart Caffeine' next to a glass mug filled with capsules on a reflective surface.
Bottle of NeuroFuel with capsules on a transparent stand with a yellow background
Smart Caffeine and NeuroFuel supplement facts labels.

This stuff gives me energy without giving the heart palpitations. I just feel good. I’m so glad I found it.

Karen M.

Verified NEUROFUEL™ Nootropic + Smart Caffeine® Stack Customer

NEUROFUEL™ Nootropic + Smart Caffeine® Stack

4.8
Rated 4.8 out of 5 stars
799 Reviews
$40.73

Supports deep focus, concentration and energy all-in-one.*

6 Pack Subscription $183.30 - every 6 months 6 stacks Free Shipping
save 40% $305.46 $30.55/mo
3 Pack Subscription $103.86 - every 3 months 3 stacks Free Shipping
save 32% $152.73 $34.62/mo
1 Pack Subscription $40.73 - every 1 month 1 stack Free Shipping
save 20% $50.91 $40.73/mo
One Time Purchase $50.91 + Shipping
$50.91

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Energy Without The Crash

Key Ingredients

Green Coffee Beans

Supports a relaxed but alert state that is ideal for productive, focused activity - mental or physical.

L-Theanine

It has the potential to support relaxation and focus, helping to create a balanced and centered state of mind.*

Coleus forskohlii

May support the production of cyclic adenosine monophosphate (cAMP), a crucial molecule in the brain for memory.

Other Ingredients Include:

Acetyl-L-Carnitine HCL
Artichoke Leaf Extract
L-Phenylalanine
Vitamin B6

Third-party testing

Open Source. Full Transparency.

Every batch is third-party tested to ensure purity, potency, and quality.

  • Verified ingredients and dosages—exactly as listed (no proprietary blends)
  • Tested for heavy metals, mold, yeast, and other harmful bacteria
  • Fully traceable ingredients from supplier to shelf
  • No artificial fillers or unnecessary additives

Complete Your Stack:

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The Next Evolution of Caffeine.

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Smart Ginkgo™

Supports longer-lasting attention and focus.*

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Laser Focus All Day*

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NEUROFUEL™ Nootropic + Smart Caffeine® Stack Benefits

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Mental Performance Under Pressure*

Helps maintain memory, focus, and cognitive performance even under stressful conditions.*
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Combats Occasional Brain Fatigue*

Improves mental alertness and mitochondrial function to combat feelings of occasional brain fatigue.*
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No Jitters or Crashing

Smart Caffeine® includes L-Theanine to cut down the overstimulating effects of caffeine… giving you a smooth, sustained feeling of energy without the downsides.*

Scientifically Formulated Ingredients

Green Coffee Beans

Supports a relaxed but alert state that is ideal for productive, focused activity - mental or physical.

L-Theanine

Creates long-lasting energy and attention without jitters.

Acetyl-L-Carnitine HCL

Involved in acetylcholine production, a neurotransmitter that plays a role in concentration.*

Coleus forskohlii

Widely used in traditional Ayurvedic medicine.

L-Phenylalanine

L-Phenylalanine is present in many foods (such as meat and dairy).

Vitamin B6

Contains important antioxidant properties that protect cells from damage during the production and metabolism of dopamine.*

Saffron Flower Extract

Saffron Flower Extract is a potent botanical clinically studied to support a positive mood and emotional well-being.*

Zembrin® Kanna Extract

A clinically-studied botanical extract shown to support executive function including cognitive flexibility, processing speed, and mental organization.*

Supplement Facts Show All 8 Show Less

Green Coffee Beans

Made with green coffee beans to support a relaxed but alert state that is ideal for productive, focused activity - mental or physical.

L-Theanine

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, anxiousness, or a crash. 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."

Acetyl-L-Carnitine HCL

We selected acetyl-L-carnitine because it promotes brain health.* It’s also involved in acetylcholine production, a neurotransmitter that plays a role in concentration.*

Coleus forskohlii

Forskolin is derived from the plant Coleus forskohlii which has been widely used in traditional Ayurvedic medicine. It has also has been extensively studied due to it’s ability to increase levels of intracellular cAMP molecules. Combined with Luteolin from Artichoke Extract, forskolin is theorized to synergistically increase the duration of cAMP in neurons.

L-Phenylalanine

L-Phenylalanine and L-Tyrosine are amino acid precursors to dopamine - both must be present in order for dopamine to be synthesized. L-Phenylalanine is present in many foods (such as meat and dairy), and is converted into L-Tyrosine in the body. In turn, L-Tyrosine is converted into L-Dopa, the direct precursor to dopamine.*

Vitamin B6

Vitamin B6 helps convert L-Dopa into dopamine and Vitamin C helps convert dopamine into norepinephrine (increasing alertness and attention).* Each of these also have important antioxidant properties that protect cells from damage during the production and metabolism of dopamine.*

Saffron Flower Extract

We included Saffron Flower Extract because it is a potent botanical clinically studied to support a positive mood and emotional well-being.* It helps maintain optimal neurotransmitter balance to keep you feeling calm, clear, and driven.*

Zembrin® Kanna Extract

We included Zembrin® because it is a clinically-studied botanical extract shown to support executive function including cognitive flexibility, processing speed, and mental organization.* Zembrin® is a PDE4 inhibitor, helping to increase and prolong cAMP signaling.* This results in better focus, recall, and mental performance.*

Smart Caffeine and NeuroFuel supplement facts labels.
How To Use

How Many Servings In Each Bottle?

Neurofuel: 30 servings

Smart Caffeine: 60 servings

Warning: If you are pregnant, nursing, or taking medications, consult a healthcare practitioner before use.

How Many Capsules A Day?

Neurofuel: Take up to 2 capsules/day as needed

Smart Caffeine: Take a serving of 1-2 capsules whenever focused energy is desired. Avoid use in the evening.

What To Expect

"The one two punch that hotwires the brain"

- Jonathan C.

"I love both of these products. I use the Smart Caffeine nearly daily. Such a better way to go than Preworkouts or other stimulants. Well done!"

- Jeff H.


Results You Can Feel. Lab Tests You Can See.

View 3rd Party Test results for The Current Batch


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™ on transparent, tamperproof, trusted data.

Learn More About Our Commitment to Transparency

Certified Open Source - Trademark. Full Label Disclosure
Warning: If you are pregnant, nursing, or taking medications, consult a healthcare practitioner before use.

Reviews

4.8
Rated 4.8 out of 5 stars
Based on 799 reviews
97%would recommend these products
Enhanced ConcentrationRated 4.4 on a scale of 1 to 5
Increased MotivationRated 4.2 on a scale of 1 to 5
Mood ElevationRated 4.2 on a scale of 1 to 5
Increased EnergyRated 4.4 on a scale of 1 to 5
Improved ConcentrationRated 4.3 on a scale of 1 to 5
Write a Review (Opens in a new window)
799 reviews
  • RA
    Randall A.
    Verified Buyer
    Reviewing
    Smart Caffeine®
    I recommend this product
    Rated 5 out of 5 stars
    2 days ago
    Smart Caffeine

    It was the missing link to my Neuro Fuel stack. After I added the smart caffeine to my morning, it got things moving quickly and really helped the Neuro Fuel effect kick in fast!

    Was this helpful?
  • CC
    Carrie C.
    Flag of United States
    Verified Buyer
    Reviewing
    NEUROFUEL™ Nootropic
    I recommend this product
    My Age 55 - 64
    My Regular Dosage 2 Capsules
    I Use NeuroFuel For Everyday
    Rated 5 out of 5 stars
    2 months ago
    Love it!

    I have been using this for years and it really keeps me focused and in a better mood.

    Enhanced ConcentrationRated 5.0 on a scale of 1 to 5
    Increased MotivationRated 4.0 on a scale of 1 to 5
    Mood ElevationRated 4.0 on a scale of 1 to 5
    Was this helpful?
  • MR
    Marianne R.
    Verified Buyer
    Reviewing
    NEUROFUEL™ Nootropic
    Rated 3 out of 5 stars
    4 months ago
    No bene

    I have taken it for 2 months and don't have any better memory at this point.

    Was this helpful?
  • ER
    Eric R.
    Verified Buyer
    Reviewing
    NEUROFUEL™ Nootropic
    Rated 3 out of 5 stars
    6 months ago
    testing

    Not enough time to rate Neurofuel

    Was this helpful?
  • LB
    LaWanda B.
    Verified Buyer
    Reviewing
    Smart Caffeine®
    I recommend this product
    Rated 5 out of 5 stars
    6 months ago
    Works good

    I have noticed an increase in alertness and memory since starting this a few months ago.

    Was this helpful?

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