Caffeic Acid Phenethyl Ester for Health & Longevity - Quick Reference Sheet

Caffeic Acid Phenethyl Ester for Health & Longevity

Created on 07/18/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 4.8 Audit

A natural antioxidant and anti-inflammatory compound from propolis. Nearly all evidence comes from cell and animal studies, with no human trials, poor oral absorption, and a shift from protective to damaging at high doses. Safety knowledge derives mostly from propolis, which can cause allergic reactions and carry heavy-metal contamination. Promising but unproven; experimental. (Full Review)

Protocol

Form
Standardized propolis extract
Standardized for CAPE content; purified CAPE is not a marketed drug
Timing
With a fat-containing meal
Fat-soluble and poorly absorbed; food may improve tolerability
Dosing
Split, twice daily
Rapid clearance and poor bioavailability favor divided doses with meals
Time to effect
Anti-inflammatory effect
Weeks
Expected to build over weeks; no validated human timeline

Benefits

Contraindications
  • Known propolis/bee-product allergy
  • Pregnancy or breastfeeding
  • Active chemotherapy, radiotherapy, or immunosuppression (except under specialist supervision)
  • Anticoagulant use without medical oversight
  • Within ~2 weeks of scheduled surgery
Key Interactions
  • NSAIDs (ibuprofen, naproxen, aspirin)
  • Additive antioxidants/anti-inflammatories (curcumin, quercetin, resveratrol, fish oil)
  • Additive antiplatelet agents (ginkgo, garlic, high-dose vitamin E)

Risk & Side Effects

  • Low: Allergic & hypersensitivity reactions; contaminant exposure from propolis-derived material
  • Speculative: Gastrointestinal upset; pro-oxidant / cytotoxic effects at high concentrations; reproductive & developmental uncertainty; potential bleeding / anticoagulant interaction

Monitoring

Marker Target Why
hs-CRP < 1.0 mg/L Tracks body-wide inflammation CAPE is proposed to lower
ALT and AST (liver enzymes) ALT ~10–26 U/L; AST ~10–26 U/L Detect liver stress from the supplement or contaminants
eGFR / creatinine eGFR > 90 mL/min/1.73m²; creatinine mid-reference Kidney safety and relevance to the organ-protection signal
Fasting glucose & HbA1c Glucose 75–86 mg/dL; HbA1c < 5.4% Tracks the metabolic/insulin-sensitivity pathway CAPE targets
CBC (complete blood count) Within reference range Screens for anemia or platelet changes relevant to bleeding concern
Heavy-metal panel (blood lead) As low as possible; below reference Screens for contaminant exposure from propolis-derived material

Cadence: Baseline, then ~8–12 weeks after starting, then every 6–12 months; earlier if any adverse symptom appears

Qualitative Assessment

  • Energy and general vitality
  • Joint comfort and recovery
  • Skin reactions (rash, itching, irritation)
  • Digestive comfort