Acetylcholine™ + NEUROFUEL™ Stack


Deep focus, concentration and energy all-in-one.

The two Natural Stacks work in perfect synergy to give you enhanced focus, concentration and energy that lasts all day long.


The World’s First Open-Source Supplement Company

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. 



(60 Capsules) is the world's first and only official CILTEP stack formulated by Abelard Lindsay. CILTEP is the healthy, natural way to stay focused, alert and motivated for hours. Learn more

Smart Caffeine (60 Capsules) eliminates the jitters or anxiety normally associated with caffeine use. By combining caffeine with L-theanine, the calming agent found in green tea, you're able to experience hours of focused energy. Learn more

The two Natural Stacks work extremely well in congruence with one another, but we recommend testing your tolerance with each first. 


NEUROFUEL™ is the original CILTEP® formula for enhanced focus, deep concentration and improved memory. 

The premium natural ingredients work as fuel for your neurotransmitters, supporting greater signaling between brain cells. 

FEEL THE FUEL within 30 minutes of your first dose. 

Smart Caffeine

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.

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.