
SLOW-RELEASE CAFFEINE (400mg CaffXtend®)
Slow-release granular caffeine 400mg. Raw material CaffXtend® (50% pure caffeine). Pure caffeine content of 200mg per capsule. High vitamin content. Best action profile for long sessions of ultra-endurance sports, study and work. Less adverse effects from caffeine. Suitable for vegans.




- Slow-release caffeine.
- Raw material: CaffXtend®.
- 200mg of pure caffeine.
- With pantothenic acid and vitamin B6.
- Suitable for vegan diets.
Table of contents
CaffXtend®: Caffeine for the most sensitive people
Slow-Release Caffeine (400mg CaffXtend®) by EssentialSeries is a dietary supplement based on slow-release natural granulated caffeine with vitamin B6 and pantothenic acid.
CaffXtend® is a prestigious registered trademark known for its granulation system that allows for a sustained release of natural caffeine.
This is a vegan-friendly product.
Nutritional properties of Slow-Release Caffeine (400mg CaffXtend®)
CaffXtend® is a granular caffeine format containing 50% pure natural anhydrous caffeine:
This dietary supplement contains 400mg of CaffXtend®, which is equivalent to 200mg of pure caffeine.
Caffeine
Caffeine:
- Helps increase alertness.1
- Helps improve concentration.1
- Contributes to an increase in endurance performance.2
- Contributes to the reduction of perceived exertion during exercise.3
Pantothenic acid
Pantothenic acid:
- Contributes to normal energy metabolism.
- Helps reduce tiredness and fatigue.
- Contributes to normal intellectual performance.
Vitamin B6
Vitamin B6:
- Contributes to normal energy metabolism.
- Helps reduce tiredness and fatigue.
Discover a unique HSN development with the best slow-release caffeine raw material: CaffXtend®.
CaffXtend® raw material
The 200mg of pure caffeine contained in our SR caffeine comes from CaffXtend®, a unique ingredient.
CaffXtend® employs a patented release modification technology platform, which causes a single dose of caffeine to be released over a 12-hour period, according to the company that owns the trademark: Inventia Healthcare Ltd.
Release pattern
CaffXtend® has different pharmacokinetics from other immediate-release caffeine.
Its different dissolution profile is due to its granulation technology, which converts its caffeine into a slow-release compound.
According to data provided by Inventia, based on its own research, CaffXtend® caffeine is released for more than 12 hours.

While other products made from regular presentations of immediate-release caffeine release more than 95% of their content in the first 5 minutes (Sager et al., 2019).
In convenient capsule size.
The product is easy to use and comes in convenient capsule format.
When to choose slow-release caffeine versus fast-absorbing caffeine?
Immediately absorbed caffeine is excellent for use before short workouts, lasting 1-2 hours, as it peaks and then the concentration drops rapidly.
However, when you are studying, for example, this 'dip' is very noticeable, it is known as a 'caffeine crash', which makes you feel much more tired after a few hours.
Slow-release caffeine by CaffXtend® is the best choice for students and workers as, thanks to its much longer release, recent studies have shown that the effects achieved are greater from consumption up to 8 hours later (ideal for long study sessions and working days), causing fewer jitters than immediate caffeine, as it does not reach such high peaks in the blood.
You can read more about this topic in the following scientific study::
- Thanawala, S., Shah, R., Abiraamasundari, R., Senthurselvi, R., & Desomayanandam, P. (2022). Comparative Bioavailability and Benefits on Mental Functions of Novel Extended-Release Caffeine Capsules against Immediate-Release Caffeine Capsules: An Open-Label, Randomized, Cross-over, Single-Dose Two-Way Crossover Study. Journal of Dietary Supplements, 1–15.
Vegan-friendly
Slow-release caffeine (400mg of CaffXtend®) is a product suitable for vegetarian and vegan diets.
High vitamin content
HSN's slow-release caffeine has a high pantothenic acid and vitamin B6 content.
What products can you combine this caffeine with? We recommend you try:
Further reading on caffeine
- Sager, M., Schick, P., Mischek, M., Schulze, C., Hasan, M., Kromrey, M. L., … Koziolek, M. (2019). Comparison of in vitro and in vivo results using the gastroduo and the salivary tracer technique: Immediate release dosage forms under fasting conditions. Pharmaceutics, 11(12).
- Grgic, J., Grgic, I., Pickering, C., Schoenfeld, B. J., Bishop, D. J., & Pedisic, Z. (2019). Wake up and smell the coffee: Caffeine supplementation and exercise performance - An umbrella review of 21 published meta-analyses. British Journal of Sports Medicine, 54(11), 681–688.
- Goldstein, E. R., Ziegenfuss, T., Kalman, D., Kreider, R., Campbell, B., Wilborn, C., … Antonio, J. (2010). International society of sports nutrition position stand: Caffeine and performance. Journal of the International Society of Sports Nutrition, 7(1), 5.
- Cappelletti, S., Daria, P., Sani, G., & Aromatario, M. (2014). Caffeine: Cognitive and Physical Performance Enhancer or Psychoactive Drug? Current Neuropharmacology, 13(1), 71–88.
1 The effect is obtained with an intake of at least 75mg of caffeine..
2 The effect is obtained with an intake of 3mg of caffeine/kg body weight, one hour before exercise. This guidance is aimed at adults who engage in endurance exercise.
3 The effect is obtained with an intake of 4mg of caffeine/kg body weight, one hour before exercise. This guidance is aimed at adults who engage in endurance exercise.
Nutritional FactsSLOW-RELEASE CAFFEINE (400mg CaffXtend®) - 120 veg caps |
daily doseper serving |
Serving size: 1 veg caps | ||
daily dose: 1 veg caps | ||
Servings per container: 120 | ||
Daily amount | |||
---|---|---|---|
Long-acting natural granulated caffeine (CaffXtend®) | 400mg | ||
Caffeine | 200mg | ||
Pantothenic Acid | 6mg | ||
of calcium D-pantothenate | 6.5mg | ||
Vitamin B6 | 0.7mg | ||
of pyridoxine hydrochloride | 0.8mg |
NRVs (Nutrient Reference Values) established in Regulation (EU) 1169/2011 of 25 October 2011. †† NRVs are not established on this occasion. |
Ingredients
Long-acting granulated natural caffeine [caffeine anhydrous (vegetable extraction from Coffea robusta beans), maltodextrin, anti-caking agent (fatty acids), glazing agent (carnauba wax)], hydrolysed rice flour, vegetable capsule [glazing agent (hydroxypropyl methyl cellulose)], anti-caking agent (L-leucine), calcium D-pantothenate (pantothenic acid), pyridoxine hydrochloride (vitamin B6).
Warnings
Store in a cool (below 25°C), 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. Contains caffeine (200mg/daily dose). Not recommended for children nor pregnant or nursing mothers. It is necessary to maintain a varied and balanced diet and a healthy lifestyle. Health claim awaiting European authorization.

How to take SLOW-RELEASE CAFFEINE (400mg CaffXtend®) - 120 veg caps
Take 1 vegetable capsule 1 time a day, preferably in the morning.

A satisfied customer says:
Excellent product
Mari 25/01/2024
I love it, to have better focus on training, for days when you can not pull your body and you have a long day of work, helps concentration, no doubt I love it, its price is ideal.
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A critical customer says:
Care
Sergio 25/06/2023
many times it feels bad when taking it, it may be because of the type of caffeine or it may depend on the person.
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Perfect
Christopher 20/09/2025
I use this supplement at work on days when I'm a bit tired, and I'm happy with it.
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Good
Daniela 17/09/2025
An indispensable supplement in my daily routine. Does what it promises. Good value for money.
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Great activation and durability
Ricardo 30/07/2025
Unbeatable price and very long lasting effects. A very successful purchase as an alternative to coffee, I will buy it again.
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Good to start with
David 20/07/2025
The truth is that I haven't noticed anything with this product, I prefer a more traditional caffeine than this one.
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Fairly well
Monica 09/06/2025
I am trying it, if I notice its effect, it helps me to stay awake longer without that big energy peak, if not, more sustained.
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