Skip to main content

Nootropic

Guarana

Also known as: Paullinia cupana, Guarana seed extract, Guarana powder, Amazonian guarana

B
Evidence

Guarana is a natural caffeine source from Amazonian seeds containing 2-7% caffeine by weight, traditionally used for energy and cognitive stimulation. Multiple studies support its effectiveness for enhancing alertness, focus, and physical performance comparable to synthetic caffeine.

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

Find the best Guarana supplements — free
See Guarana products scored on dose & form, then track your intake in the app.
Open app →

Primary uses

  • Energy and alertness
  • Cognitive function and focus
  • Physical endurance and performance
  • Mental fatigue reduction
  • Mental focus and concentration
  • Physical endurance and stamina
  • Natural caffeine source

How it works

  • Adenosine receptor antagonism via caffeine content
  • Central nervous system stimulation
  • Potential antioxidant effects from polyphenols
  • Enhanced catecholamine release

Dosage

Typical range
200-400 mg daily (guarana powder containing 20-80 mg caffeine per serving)
Timing
Morning or early afternoon to avoid sleep disruption
With food
Can be taken with or without food; may cause less stomach irritation with food
Duration
Safe for regular daily use; effects typically felt within 30-60 minutes
Special populations
Avoid or limit in pregnancy, nursing, caffeine sensitivity, anxiety disorders, or cardiac conditions. Pediatric use not recommended.

Forms

  • Seed powder· 70/100
  • Capsule· 70/100
  • Extract· 70/100
  • Tablet· 70/100
  • Beverage· 70/100
  • Powder· 70/100
  • Seed extract· 70/100

Safety

Common side effects

  • Jitteriness
  • Anxiety
  • Sleep disruption
  • Increased heart rate
  • Digestive upset
  • Headaches (if overused or withdrawn)

Contraindications

  • Pregnancy and breastfeeding
  • Uncontrolled hypertension
  • Cardiac arrhythmias
  • Severe anxiety or panic disorder
  • Caffeine sensitivity
  • Concurrent high-dose stimulant use

Evidence notes

Good evidence from multiple RCTs demonstrating efficacy for alertness and cognitive function. Caffeine mechanism is well-established; guarana's additional benefits beyond caffeine content are less conclusively proven. Grade B reflects reliable human trial data on standard endpoints.

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

Related in Nootropic

Check a full stack

Formulate's free interaction checker lets you paste in any combination of supplements and medications at once — every pairing flags severity, timing, and cited evidence.

Open the checker

Where does Guarana fit in your stack?

Answer two questions and get a stack graded on research — every ingredient scored on the evidence behind it, not the marketing.

Build my stack

2 questions · free · no account needed to start

Also on iPhone — get the free app

📬 Get new guides in your inbox

Evidence-based supplement guides, no spam

We send a short digest when new guides drop — nothing else. No affiliate pushes, no sponsored content, unsubscribe anytime.

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.