Supplement Scholar
Compound

Propolis

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Propolis. Bee glue with caffeic acid phenethyl ester.

How it works. CAPE inhibits NF-κB; antiviral.

What the research supports. 1 graded claims. Strongest: Reduces cold sore healing time (moderate).

How much to take. Typical dose: 500–1000 mg.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with Vitamin D3 + K2, Zinc.

Common forms. Available as Capsule or softgel, Powder, Sublingual or buccal, Liposomal liquid.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Propolis. Anecdotes are not medical advice.

Propolis. Bee glue with caffeic acid phenethyl ester.

Key compound: caffeic acid phenethyl esterC17H16O4 · 284.31 g/mol

What it is

Bee glue with caffeic acid phenethyl ester.

Food sources

Endogenously produced or biosynthesized moleculeStandardized pharmaceutical- or food-grade supplementCombined with cofactors that improve absorption or activity

Goals

Immune Function

How it works

CAPE inhibits NF-κB; antiviral.

Pathways

  • CAPE inhibits NF-κB
  • antiviral

Effects

  • ↓cold sore healing time decreases

What the research supports

Reduces cold sore healing timemoderate

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
500–1000 mg
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith a meal containing fat for fat-soluble compounds; otherwise either.
Best formMost evidence is based on the capsule or softgel form.
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Side effects & interactions

Common side effects

  • Allergy

Medication interactions

Prescription medications (general)minor

Always disclose Propolis use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • Vitamin D3 + K2Foundational immune modulation.
  • ZincRequired cofactor for innate and adaptive immune function.

Common forms

  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Key studies

8 studies cited in total.

PubMed: Propolis — Reduces cold sore healing time ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Propolis and "Reduces cold sore healing time". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Propolis — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Propolis and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Propolis — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Propolis and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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