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Cayenne Pepper Powder

Also known as: Capsicum annuum, Capsicum frutescens, red pepper, chili pepper, capsaicin source

Evidence under review. — Not yet rated

Spice-derived ingredient with some evidence for appetite reduction and mild calorie burning.

  • What it does

    Cayenne pepper powder comes from dried hot chili peppers and gets its effects from capsaicin, the compound that makes peppers spicy. It is traditionally used to support digestion and has been...

  • Evidence quality

    Evidence base hasn't been formally rated yet. See research below.

  • Clinical dose

    30-120 mg capsaicin equivalent daily (general knowledge estimate)

See full breakdown ↓ Methodology →

What the Science Says

Cayenne pepper powder comes from dried hot chili peppers and gets its effects from capsaicin, the compound that makes peppers spicy. It is traditionally used to support digestion and has been studied for its potential to temporarily boost metabolism and reduce appetite, particularly when consumed before meals. Based on general knowledge, effects are modest and short-lived, and no specific dose or timeframe can be confirmed from the studies provided here.

What It Doesn't Do

Won't melt fat on its own. Not a substitute for diet or exercise. No evidence it significantly changes body weight long-term. Won't 'detox' your body. The metabolism boost is tiny — don't expect dramatic results.

Evidence-Based Benefits

May reduce appetite and calorie intake when consumed before or with meals.

Weak Evidence

Effective at: No established dose from provided studies

Temporarily increases calorie burning through a mild thermogenic effect.

Weak Evidence

Effective at: No established dose from provided studies

Traditionally used to stimulate digestion and reduce bloating.

Weak Evidence

Effective at: No established dose from provided studies

Absorption & Bioavailability

Moderate — capsaicin is fat-soluble and absorbs better when consumed with food containing fat. Tolerance to its effects can develop with regular use, potentially reducing impact over time.

Red Flags to Watch For

  • Can cause significant GI irritation, heartburn, or stomach pain — especially on an empty stomach or at high doses
  • May interact with blood thinners (e.g., warfarin) and ACE inhibitors — consult a doctor if on medication
  • Tolerance to capsaicin's thermogenic effects can develop quickly, reducing effectiveness with continued use
  • Products vary wildly in capsaicin concentration — 'cayenne pepper powder' on a label tells you little about actual active dose
  • Not appropriate for people with acid reflux, IBS, or peptic ulcers

Research Sources

  • General knowledge — no paper abstracts were provided for this analysis. Limited published research available.

This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25