Performance

ZumXR Extended Release Caffeine

Also known as: ZumXR ER caffeine, extended-release caffeine, sustained-release caffeine

Evidence

ZumXR Extended Release is a proprietary extended-release caffeine formulation designed to provide sustained energy and mental alertness over several hours. It mitigates the energy crash typical of immediate-release caffeine.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

Sustained mental energy
Extended focus and concentration
Fatigue reduction
Smooth caffeine delivery without crash

How it works

Controlled-release caffeine absorption via proprietary matrix
Adenosine receptor antagonism over extended period
Sustained CNS stimulation

Dosage

Typical range: 100-300 mg daily
Timing: Morning or early afternoon
With food: Can be taken with or without food; consistent timing optimizes absorption
Duration: Effects sustained for 6-8+ hours; reduces mid-afternoon energy crash
Special populations: Avoid in evening; limit total daily caffeine to <400 mg

Forms

capsule· 70/100

Safety

Common side effects

Mild jitteriness (less than immediate-release)
Sleep disruption if taken late
Mild nervousness

Contraindications

Cardiovascular disease
Uncontrolled hypertension
Severe anxiety
Pregnancy and lactation
Caffeine sensitivity

Evidence notes

Extended-release caffeine formulations have demonstrated efficacy in maintaining alertness without energy crashes; however, ZumXR-specific data is limited. General extended-release technology is well-established.

Grade B: Some human trials support key claims; further confirmation needed.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.