Your shopping cart has
This form is protected by reCAPTCHA - the Google Privacy Policy and Terms of Service apply.
Get deals 🎁 starting at 225 zł
Slow-release caffeine. Improved release profile for longer effects on concentration, without caffeine dips and spikes. With L-Theanine, pantothenic acid, vitamin B6 and zinc. Suitable for vegans and vegetarians. * Pantothenic acid contributes to normal mental performance.
With no artificial colourings
No Preservatives
Suitable for Vegans
Without GMOs
Dairy Free
Egg Free
Nut Free
Suitable for Vegetarians
Soy Free
Fish Free
Lactose Free
Gluten Free
Minimum purchase of units!
Warning about our product information
Warning about our product information
Before
After
During
Morning
Afternoon
NightBeforeAfterDuringMorningAfternoonNightServings: 120
| Field | Per serving | Daily amount | NRV* | NRV* |
|---|---|---|---|---|
Long-acting natural granulated caffeine (CaffXtend®) | 300 mg | 300 mg | ++ | ++ |
Caffeine | 150 mg | 150 mg | ++ | ++ |
L-Theanine | 200 mg | 200 mg | ++ | ++ |
Pantothenic Acid | 6 mg | 6 mg | 100% | 100% |
of calcium D-pantothenate | 6.5 mg | 6.5 mg | ++ | ++ |
Vitamin B6 | 1.4 mg | 1.4 mg | 100% | 100% |
of pyridoxine hydrochloride | 1.6 mg | 1.6 mg | ++ | ++ |
Zinc | 3 mg | 3 mg | 30% | 30% |
of zinc citrate | 9.6 mg | 9.6 mg | ++ | ++ |
NRVs (Nutrient Reference Values) established in Regulation (EU) 1169/2011 of 25 October 2011. †† NRVs are not established on this occasion.
Ingredients
Long-acting natural granulated caffeine [caffeine anhydrous (plant extract from Coffea robusta beans)], L-theanine [from green tea leaf extract (Camellia sinensis)], vegetable capsule [glazing agent (hydroxypropyl methyl cellulose)], rice flour, anti-caking agent (magnesium salts of fatty acids), zinc citrate, calcium D-pantothenate (pantothenic acid), pyridoxine hydrochloride (vitamin B6).
Warnings
Once opened, store in a cool (under 25ºC), dry and dark place. Do not exceed the stated recommended daily dose. Keep out of reach of the smallest children. Nutritional supplements should not be used to replace a balanced diet. It is necessary to maintain a varied and balanced diet and a healthy lifestyle. Contains caffeine (150mg/daily dose). Not advised for children nor pregnant women. Caffxtend® is a registered trademark of Inventia Healthcare Ltd..
Servings: 30
| Field | Per serving | Daily amount | NRV* | NRV* |
|---|---|---|---|---|
Long-acting natural granulated caffeine (CaffXtend®) | 300 mg | 300 mg | ++ | ++ |
Caffeine | 150 mg | 150 mg | ++ | ++ |
L-Theanine | 200 mg | 200 mg | ++ | ++ |
Pantothenic Acid | 6 mg | 6 mg | 100% | 100% |
of calcium D-pantothenate | 6.5 mg | 6.5 mg | ++ | ++ |
Vitamin B6 | 1.4 mg | 1.4 mg | 100% | 100% |
of pyridoxine hydrochloride | 1.6 mg | 1.6 mg | ++ | ++ |
Zinc | 3 mg | 3 mg | 30% | 30% |
of zinc citrate | 9.6 mg | 9.6 mg | ++ | ++ |
NRVs (Nutrient Reference Values) established in Regulation (EU) 1169/2011 of 25 October 2011. †† NRVs are not established on this occasion.
Ingredients
Long-acting natural granulated caffeine [caffeine anhydrous (vegetable extraction from Coffea robusta beans)], L-theanine [from green tea (Camellia sinensis) leaf extract], vegetable capsule [glazing agent (hydroxypropyl methyl cellulose)], rice flour, anti-caking agent (magnesium salts of fatty acids), zinc citrate, calcium D-pantothenate (pantothenic acid), pyridoxine hydrochloride (vitamin B6).
Warnings
Once opened, store in a cool (under 25ºC), dry and dark place. Do not exceed the stated recommended daily dose. Keep out of reach of the smallest children. Nutritional supplements should not be used to replace a balanced diet. It is necessary to maintain a varied and balanced diet and a healthy lifestyle. Contains caffeine (150mg/daily dose). Not advised for children nor pregnant women. Caffxtend® is a registered trademark of Inventia Healthcare Ltd..
Smart Caffeine by EssentialSeries is a food supplement in vegetable capsules, based on a combination of natural caffeine anhydrous from coffee beans, the amino acid L-Theanine, pantothenic acid, vitamin B6, and zinc.
Caffeine is the most widely used alkaloid in the world through the extensive use of drinks such as tea and coffee. L-theanine is the main amino acid constituent of the leaves of the tea plant (Camellia sinensis).
This product is made from ingredients that are 100% free from traces of animal derivatives.
Smart Caffeine is a product suitable for vegetarians and vegans.
The caffeine in this formula is CaffXtend®. A unique ingredient, as it is released over 12 hours thanks to a patented technology (according to Inventia Healthcare Ltd, the brand's proprietary company).
Immediate-release caffeine is not the best option when it comes to using caffeine for studying, as its effect is fast and intense, but it does not last over time and after a few hours fatigue sets in quickly and unexpectedly, making you feel a 'dip'. This is what we called a 'caffeine crash'.
As CaffXtend® is released for much longer than immediate-release caffeine:
Up to 12 hours vs minutes.
Its effects are more sustained over time, something that has been highlighted by recent studies showing that, although total caffeine absorption is identical between the immediate and prolonged speed, its effects are better in the case of the prolonged speed several hours after ingestion, and there is no caffeine 'crash' because there are no 'peaks' or ' dips'.
CaffXtend® is the best option for students, and that's why it's the star of our smart caffeine.
The dose ratio between caffeine and L-theanine is an important factor in establishing the pattern of action of the compound, and the choice of dose is relevant.
Our product contains a dose of 150mg of caffeine and 200mg of L-theanine per capsule.
Capsule products sometimes present problems for people who do not consume animal foods, as gelatine is used as a glazing agent.
HSN avoids the use of gelatine in our capsules and instead uses a polymer derived from cellulose, of vegetable origin.
Our capsules are veggies, and smart caffeine is a 100% vegetarian and vegan friendly product.
With HSN products such as:
Studies on the subject
1 In doses of at least 75mg.
2 In doses of at least 75mg.
Ask a question
No questions available
Do you have questions about the product?
The team of experts is here to help you.
We will try to resolve your query as soon as possible.
Login and ask usWhat our customers say about the product
A critical customer says:
Do not notice much
Darío | 14/05/2025
I didn't notice a big difference, but it goes down easy and does its job for a boost, although I didn't notice too much.
Score of 4.8 / 5.00 of 710 real reviews
Manuel |
Brutal long-lasting effect
It lasts for hours and keeps you super focused during those exams or long work sessions that require your mind at 110%, I recommend it.
Christian |
I am satisfied with its effects
I have consumed a bottle for 30 days and the effects of this caffeine have exceeded my expectations. I highly recommend it.
David |
Regular
I did not notice sustained caffeine release throughout the day with this supplement.
Miguel |
Very effective
Highly recommended product to be able to study or stay awake even more than twelve hours.
David |
Improved alertness
Improves alertness and concentration. Theanine dampens the stimulating effect of caffeine and you don't feel jittery.
Own manufacturing
We produce our products and sell them directly to you.
Guaranteed quality
Complete control over our processes earns us the highest certifications.
Right price
Our philosophy ensures we offer the best possible price to our customers.
Sustainable and social
We strive to contribute to a better society.
Free shipping
Spend just €85, and we’ll ship your entire order for free.
Super-fast delivery
Once you place your order, it’ll arrive within 3-5 business days.
Daily promotions
We run daily offers so you can make the most of our deals.
Payment options
You can choose from a variety of payment methods.
Add to cart
Changing language
