Natural Stacks Smart Caffeine Review


Last modified: March 15, 2018

  • Value for money
  • Ingredients
  • Effectiveness
  • Testimonials

Natural Stacks Smart Caffeine Overview

Smart Caffeine is a combination of L- theanine and Caffeine. L- theanine is an amino acid found in green tea the has properties to remove the unwanted side effects of caffeine. The product creates a long lasting energy and boosts attention without anxiety or jitters.

What does Natural Stacks Smart Caffeine do?

Natural Stacks Smart Caffeine…

  • Increased focus and alertness

  • Improved cognitive function

  • Enhanced short-term memory retention

  • More ability to ignore distractions

  • No over stimulation

Manufacturer Description

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.


  • Caffeine dosage is quite low.
  • Effects may wear off after a short time.

Consumer Testimonials

“Excellent product. Great training aid if lacking energy for a workout.”


“Smart Caffeine tablets for smart people! I was looking for something new to try for some extra energy us my husband at the moment works in two jobs, so he needs some extra help in some bad days when filled tired. I bought few different energy supplements to try and can say most of them don’t work. This one works really fast us my husband said he fells different in about 20 minutes time, they helps to finish work and when he comes home can sleep normally with no side effects. Smart Caffeine supplement works but personally I think it’s not for long periods to use it, just some extra help at hard moments.”

“I’ve been taking this stuff for about two weeks as a booster to my usual (Nootropic) vitamins. The effects come after about 30 mins: I felt calm, but focused, regardless of what time it was. The effect was not profound, but definitely provided the caffeine without the jitters and come down. Only downside was that the effects went as quickly as they came; even taking two at a time, the effects only lasted about 90 mins. Would recommend this as a quick surge of mental energy, but it’s not a wonder-pill and won’t do much without another stack.”

What's in Natural Stacks Smart Caffeine

  • Natural caffeine – 100mg.
  • L-Theanine (from green tea) – 200mg.
  • Vegetable capsule.
  • Cellulose
  • Vegetable stearate.
  • Silica.

Our Verdict

Think of this as a great little “pick me up”, not a full-on thermogenic supplement. Smart Caffeine can be taken up to six times daily (as opposed to the usual four pills for something stronger). Natural Stacks lists the suppliers that provide their ingredients, which means they’re confident of their products. A 30 day guarantee is provided for a full refund. Overall, a nice daily boost, and not too expensive.

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