Caffeic Acid

What is Caffeic Acid?

Caffeic acid is a naturally occurring hydroxycinnamic acid, a type of polyphenol, abundant in plants like coffee beans, apples, artichokes, and propolis. Chemically known as 3,4-dihydroxycinnamic acid, it features a structure with hydroxyl groups that enable strong electron donation. In cosmetic formulations, it belongs to the antioxidant and sensory modifier categories. It functions by scavenging free radicals to stabilize oils, colors, and active compounds against degradation, extending product shelf life. Additionally, its mild aromatic profile contributes to fragrance blends and neutralizes off-odors, enhancing the overall sensory appeal without dominating the scent.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 3 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Antioxidant
Slows oxidation of oils, fragrances, and sensitive actives to improve shelf life and reduce rancidity or color change; sometimes also supports skin protection from oxidative stress.
Fragrance ingredient
Contributes scent character and/or masks base odors, shaping the overall sensory experience of the formula (subject to allergen and IFRA considerations).
Masking
Reduces perception of unpleasant odors or tastes by neutralizing them or covering them with more acceptable sensory notes.

Benefits

Helps preserve product stability by slowing oxidation of sensitive ingredients.

Supports a pleasant sensory experience through subtle fragrance notes.

Masks unwanted odors to improve formula usability.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals seeking stable, long-lasting skincare products.
People with known allergies to phenolic compounds.
Users preferring formulas with natural scent enhancers.
Sensitive skin types prone to fragrance reactions.
Those wanting antioxidant support in daily routines.
Individuals experiencing irritation from plant-derived actives.

Safety Notes

  • Rated moderate hazard by EWG, generally safe in typical cosmetic concentrations.
  • Low comedogenic potential, unlikely to clog pores.

Frequently Asked Questions about Caffeic Acid

What is caffeic acid's main role in cosmetics?

It primarily acts as an antioxidant to prevent oxidation, while also serving as a fragrance ingredient and odor masker.

Is caffeic acid comedogenic?

No, it has a comedogenic rating of 0, making it suitable for acne-prone skin.

How safe is caffeic acid for skin?

EWG rates it 3, indicating low to moderate concern; generally well-tolerated but test for sensitivity.