Caffeine that doesn’t hit all at once
Sustained-release caffeine (400 mg CaffXtend™) from RawSeries is a food supplement in vegetable capsules made with natural caffeine from Coffea robusta beans.
Unlike immediate-release caffeine, CaffXtend™ provides a more gradual release. Its technology allows caffeine to be released progressively, creating a more sustained release profile designed for prolonged use.
A caffeine designed for when you want a continuous release over several hours, rather than a short, immediate release.
What makes CaffXtend™ different?
CaffXtend™ is a trademarked ingredient that incorporates caffeine into a plant-based matrix. This microgranule system controls its release and allows it to be maintained progressively for a period of up to 12 hours.
In a comparative study with immediate-release caffeine, CaffXtend™ took more than four times longer to reach its maximum concentration (Thanawala et al., 2024). This reflects a more gradual absorption, without the early peak observed with conventional caffeine.
That is why it may be especially suitable when you need to maintain your routine for several hours and are not looking for the usual rapid effect of coffee, an energy drink or a pre-workout.
Why are 400 mg of CaffXtend™ and 200 mg of caffeine listed?
CaffXtend™ contains 50% caffeine within its sustained-release system. Therefore, 400 mg of the ingredient provides 200 mg of caffeine. This way, you can clearly see both the amount of CaffXtend™ and the actual amount of caffeine it contains.
Alertness and concentration
Caffeine helps to increase alertness and improve concentration. These effects are obtained with an intake of at least 75 mg of caffeine.
Who is it intended for?
This caffeine is intended for adults who are accustomed to consuming caffeine and prefer a more gradual profile. It may be an interesting option for students, exam candidates and professionals with long working days who are not looking for an immediate boost.
If you need an immediate release, standard caffeine may be a better fit. You can find it in our Natural Caffeine 200 mg.
How to incorporate it into your routine
Due to its sustained release, we recommend taking it during the first part of the day and allowing enough time before going to sleep. The response to caffeine may vary depending on sensitivity, habitual intake and other foods or drinks that contain it.
Avoid adding it without control to coffee, energy drinks, pre-workout products or other food supplements containing caffeine. If you want to add L-theanine separately, you can combine it with L-Theanine 250 mg.
As part of a sports routine, it can also be combined with stimulant-free products, such as our Creatine Monohydrate Powder (200 mesh).
Questions and answers
What does sustained-release caffeine mean?
It means that it is not released all at once. CaffXtend™ uses a plant-based matrix that allows caffeine to be released gradually, creating a more progressive profile than conventional caffeine.
Is its effect immediate?
No. Its main difference is its gradual release, making it better suited to situations where you are looking for continuity over several hours.
How long does its release last?
CaffXtend™ is designed to provide a sustained profile for up to 12 hours. The perceived duration may vary depending on each person’s sensitivity and habitual caffeine intake.
Can I combine it with coffee or pre-workout products?
All of these may provide caffeine. Before combining them, take into account the total amount consumed throughout the day and avoid combining multiple sources without monitoring your intake.
Does it taste like coffee?
No. Although the caffeine comes from coffee beans, it is provided in a vegetable capsule and does not have the characteristic flavour of a cup of coffee.
CaffXtend™ in its most straightforward form
We have developed this RawSeries formula for those looking for natural, concentrated caffeine with a different release profile. CaffXtend™ provides a gradual profile lasting up to 12 hours, in convenient vegetable capsules and with a clean-label composition free from added fillers.
A practical and transparent option for supporting long days, with the quality of a trademarked ingredient and a clearly specified amount of actual caffeine so that you have all the information you need.
Bibliographical references
- Thanawala, S., Shah, R., Abiraamasundari, R., Senthurselvi, R. and Desomayanandam, P. (2024). 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, 21(1), 13-27.
- Temple, J. L., Bernard, C., Lipshultz, S. E., Czachor, J. D., Westphal, J. A. and Mestre, M. A. (2017). The Safety of Ingested Caffeine: A Comprehensive Review. Frontiers in Psychiatry, 8, 80.
- Guest, N. S. et al. (2021). International Society of Sports Nutrition Position Stand: Caffeine and Exercise Performance. Journal of the International Society of Sports Nutrition, 18, 1.
