Home Ingredients PurCaf® (Organic Caffeine from Green Coffee)
EnergyAthletic Performance

PurCaf® (Organic Caffeine from Green Coffee)

Evidence Level
Strong
1 Clinical Trial
3 Documented Benefits
4/5 Evidence Score

PurCaf® is an organic caffeine derived from green coffee beans, offering a natural, clean-label source of caffeine. Caffeine reliably supports energy, alertness, and exercise performance.

Studied Dose Commonly 100 to 200 mg per serving; performance studies use about 3 to 6 mg per kg.
Active Compound Caffeine, from natural green coffee or tea sources.

Benefits

Energy and alertness

Caffeine is the world's most used stimulant, reliably increasing alertness, focus, and perceived energy.

Supported by Trial 1

Exercise performance

A meta-analysis confirmed caffeine improves endurance performance and time to exhaustion, a benefit used widely in sports nutrition.

Supported by Trial 1

Focus

Caffeine sharpens attention and reaction time, especially when tired.

Supported by Trial 1

Mechanism of action

1

Adenosine blockade

Caffeine blocks adenosine receptors in the brain, reducing the feeling of fatigue and increasing alertness.

2

Catecholamine release

Caffeine promotes release of adrenaline, supporting energy availability and exercise output.

Clinical trials

1
Caffeine and Endurance Performance — Meta-Analysis
PubMed

Systematic review and meta-analysis of caffeine intake on endurance performance. (Wang et al. 2022, Nutrients)

Adults across multiple trials.

Caffeine improved endurance running performance and time to exhaustion versus placebo.

Side effects and drug interactions

Common Potential side effects

Can cause jitteriness, rapid heartbeat, or trouble sleeping.
Avoid late in the day if you are caffeine-sensitive.
Account for caffeine from all sources to avoid overdoing it.

Important Drug interactions

Stimulant medications — additive effects; use caution.
Some antibiotics and antidepressants slow caffeine clearance.
Pregnancy — limit caffeine; consult a doctor.

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Frequently asked questions about PurCaf® (Organic Caffeine from Green Coffee)

What is PurCaf?

PurCaf® is an organic caffeine derived from green coffee beans, offering a natural, clean-label source of caffeine. Caffeine reliably supports energy, alertness, and exercise performance.

What is PurCaf used for?

PurCaf is researched primarily for Energy and Athletic Performance. Caffeine is the world's most used stimulant, reliably increasing alertness, focus, and perceived energy.

What is the recommended dosage of PurCaf?

The clinically studied dose is Commonly 100 to 200 mg per serving; performance studies use about 3 to 6 mg per kg. Always follow the product label and check with a healthcare provider for personal advice.

Is PurCaf safe, and does it have side effects?

For most healthy adults, PurCaf is well tolerated at studied doses. Reported effects can include: Can cause jitteriness, rapid heartbeat, or trouble sleeping. Avoid late in the day if you are caffeine-sensitive. It may also interact with some medications. PurCaf is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does PurCaf interact with any medications?

Possible interactions include: Stimulant medications — additive effects; use caution. Some antibiotics and antidepressants slow caffeine clearance. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for PurCaf?

NutraSmarts rates the evidence for PurCaf as Strong (4 out of 5). It is backed by 1 clinical trial and 1 cited reference summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(1 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Wang Z, Qiu B, Gao J, et al. Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis. Nutrients. 2022;15(1)..PubMedUsed to support: Meta-analysis supporting performance benefit of caffeine (the active in this branded caffeine).