a bottle of Smarter Caffeine + L-Theanine made with MCT Oil on a black reflective table.
A bottle of Smarter Caffeine L-Theanine on a table pouring out Caffeine supplements.
Smarter Caffeine L-Theanine compared to other similar brands.
Smarter Caffeine made with 3 ingredients, Caffeine, L-Theanine & MCT Oil. showing each ingredients benefits.
Smarter Caffeine+™
Smarter Caffeine+ L-Theanine made with MCT Oil
Smarter Caffeine+™
Smarter Caffeine+™
Number 1 Best Seller

200mg Caffeine and 
L-Theanine Capsules

Made with green tea leaves
Boost energy and focus naturally with our Caffeine and L-Theanine capsules. The perfect balance of calmness and stimulation for increased cognitive function, and improved mental clarity.
  • Maintain Focus
  • Promote Energy
  • Energize without the jitters or crash
10K+ bought in past month
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Caffeine and L-Theanine: 
Unmatched Focus and Energy

  • Elevated Mood

  • Increased Memory

  • Improve Mental Performance

  • Greater Focus

asked questions

What is Caffeine?

Caffeine is a central nervous system stimulant. It is a substance that is found naturally in leaves, seeds, and fruits of plants. More specifically, it is found naturally in coffee, tea, cocoa and cocoa products, and some flavorings.*

Caffeine is also added to foods including sodas, energy drinks, chocolate flavored milk, yogurts, frozen desserts, and some medicine such as over-the-counter pain relievers.*

Although caffeine is classified as “GRAS” (generally recognized as safe) by the FDA, some people can be sensitive to its effects. Those sensitivities include insomnia, headaches, irritability, nervousness, and migraine headaches. The effects of caffeine intake on an individual can vary and depend on many factors, such as body weight, how much is consumed, how often its consumed, and overall health status.*

How do Caffeine supplements work?

Caffeine is a stimulant that works by binding to adenosine receptors in the brain. Adenosine is a neurotransmitter that promotes feelings of drowsiness and fatigue. As caffeine binds to these receptors, it blocks the effects of adenosine and increases the activity of other neurotransmitters, such as dopamine and norepinephrine, which can lead to increased alertness and energy.*

Caffeine supplements come in different forms such as tablets, capsules and powders. They are usually taken orally and can be taken as needed or on a regular schedule. The effects of caffeine can be felt within minutes of taking a supplement and typically last for several hours.*

It's important to note that caffeine sensitivity varies from person to person, and the effects can also be affected by factors such as overall health, medications, and stress levels. Consuming too much caffeine can lead to side effects such as jitters, anxiety, and insomnia. It's always recommended to start with a small dose and increase gradually as needed. It's also recommended to not exceed the recommended daily dose and to consult with a healthcare professional before taking caffeine supplements or making any significant changes to your caffeine intake.*

How much Caffeine can i consume a day?

For healthy adults, the FDA has said 400 mg per day. Coffee houses often have this much caffeine in one large cup. Many people are consuming 3-4 of these coffee’s daily. We recommend taking one softgel (200mg) and see how that works for you and if needed use 2 softgels (400mg).*

Does Caffeine cause insomnia?

The short the answer is maybe, maybe not. It really depends on an individual basis. Some people are more sensitive to it than others.However, there are people who can have a cup of coffee after dinner and not be affected at all.*

Scientifically, after 8 hours, 75% of caffeine that we have consumed is out of our system. As we grow older, we become more and more sensitive to caffeine. So when you were younger, you may have been able to drink coffee or have tea at dinner without issue, but now you may have a hard time falling asleep. It could be the caffeine keeping you awake. However, some caffeine in the morning most likely will not affect sleep.*

Does Caffeine cause dehydration?

Caffeine has a diuretic effect that will increase urine output. Caffeine may cause dehydration in some individuals.*

Does Caffeine cause jitters?

Caffeine can cause jitters, as well as other side effects such as increased heart rate, anxiety, and insomnia in some people. The intensity and duration of these side effects can vary depending on the individual and the amount of caffeine consumed.*

How does L-Theanine and MCT oil help reduce Caffeine jitters?

L-theanine is believed to help reduce caffeine jitters by increasing levels of GABA, a neurotransmitter that promotes relaxation and reduces anxiety. L-theanine also increases the levels of serotonin and dopamine in the brain, which can also have a calming effect.*

MCT oil can help improve overall energy and focus which can reduce the negative effects of caffeine jitters, as it is quickly metabolized by the body and can be used as an energy source, also MCTs have been shown to increase ketone levels and enhance cognitive performance. However, MCT oil does not directly affect the jitters caused by caffeine.*

It's important to note that more research is needed to fully understand the mechanisms by which L-theanine and MCT oil may help reduce caffeine jitters, but these supplements may be beneficial for some people. As always, it's best to consult with a healthcare professional before taking supplements or making any significant changes to your diet or supplement regimen.*

NO BS. (Bad Stuff)

soy milk 
artificial colors 
FD&C blue #1 #2 
FD&C green #3 
FD&C red #3 #40 
FD&C yellow #5 #6
soy bean oil 
corn oil 
palm oil 

800,000+ people
love our products


Why you should choose SmarterVitamins 
Caffeine + L-Theanine Capsules

  • no time to drink a caffeinated beverage

  • fast, easy, and clean energy

  • no teeth staining from coffee

  • portability & faster aborption

  • consistent energy

  • acidty of coffee is too much to handle

  • exact dosage every time

  • no jitters & no crash

Experience the perfect 
balance between
 energy & calm

Not all caffeine pills are created equal. Many fail to deliver on their promises of energy and focus due to lousy quality and effectiveness. But we’ve created a game-changing pill that stands above the rest. 

Our unique formula of 200mg caffeine and 100mg of L-Theanine provides unparalleled sustained energy and mental clarity, without any crash or jitters. 

We’re committed to quality and purity, using only the highest-quality caffeine and L-theanine sourced from trusted suppliers. We believe in full transparency and list our ingredients clearly on the packaging.  

inside of 
Caffeine + L-Theanine

Caffeine berries


Caffeine is found in coffee, tea, cola, and other products. Caffeine is most commonly used to improve mental alertness, but it has many other uses.
MCT oil from coconuts


MCT Oil supercharges your brain, sharpening your mental clarity and focus like never before. Your cognitive performance will skyrocket, and you'll be able to tackle even the most demanding tasks with ease and confidence.
L-Theanine leaves and powder form


L-theanine, the secret weapon for unlocking your mind's true potential. This incredible compound has been scientifically proven to enhance cognitive function, promote relaxation, and boost creativity like never before.

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Made Here

Est 2016

Made with 
Non-GMO Ingredients

(cGMP) Good Manufacturing Practice

Third Party

Made in a FDA
Registered Facility

Tired of feeling
jittery & anxious?

Are you tired of feeling let down by other caffeine pills? Do they promise to give you energy but instead leave you jittery and anxious? It's time to make the switch to our unique caffeine supplement - the only product on the market that delivers sustained energy and mental clarity without any negative side effects.

Our powerful combination of 200mg of caffeine and 100mg of L-theanine is the secret to our success. While other caffeine pills may cause you to crash in the afternoon orleave you feeling anxious, ourformula provides a smooth and sustained energy boost that helps you stay alert and focused all day long.

But don't just take our word for it - our clinically-tested ingredients are proven to be safe and effective. We've put our product through rigorous testing to ensure that you're getting the best possible results. And because our caffeine pills are conveniently packaged and portable, you can take them with you wherever.
Woman pouring smarter caffeine pills in hand standing outside smiling
Smarter caffeine bottle VS other brand bottle
What sets us apart at SmarterVitamins is that we refuse to take shortcuts on our products. Our ingredients are best in class. Our formulas are unique and designed to improve human function. We hope to inspire next level performance through fitness, foods, and supplements.
The Finest IngredientsX
Easy to swallow softgel formX
Over 14k Amazon 5 star ReviewsX
200mg of CaffeineX
100mg of L-TheanineX
Made with MCT Oil X
Smooth & Longer EnergyX
No jitters, No crashX
Berry Flavored X
60 days money back guarantee
Return Policy
Customer Satisfaction is our #1 Priority
If you are unhappy with a product, simply return it within 60 days of recieving it and we'll give you a full refund.

It's that simple.


The neuropharmacology of L-theanine(N-ethyl-L-glutamine): a possible neuroprotective and cognitive enhancing agent. J Herb Pharmacother. 2006;6(2):21-30.
Acute effects of tea constituents L-theanine, caffeine, and epigallocatechin gallate on cognitive function and mood: a systematic review and meta-analysis. Nutr Rev.2014;72(8):507-22.
Fish consumption and stroke risk in elderly individuals: The cardiovascular health study. Arch Intern Med. 2005;165(2):200-206.
Changes in cerebral blood flow and carbohydrate metabolism during acute hyperketonemia. Am J Physiol. 1996;270(5 Pt 1):E746-51.
Rethinking fat as a fuel for endurance exercise. Eur J Sport Sci.2015;15(1):13-20.
Caffeine to optimize cognitive function for military mission-readiness: a systematic review and recommendations for the field.
The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness.
Caffeine effects on marksmanship during high-stress military training with 72-hour sleep deprivation.