Ingredient review
Myristic Acid
INCI: Myristic Acid
Myristic acid is a natural fatty acid that helps create a foamy lather in cleansers, but it can be drying or clog pores for some skin types.
In plain English
Myristic acid is a type of fat found naturally in coconut oil, palm oil, and nutmeg butter. In skincare, it's used mainly in soaps and cleansers because it helps produce a rich, bubbly lather that lifts dirt and oil from the skin. It also helps thicken and stabilize creams. However, because it can strip natural oils, it may leave dry or sensitive skin feeling tight. Some people find it can clog pores, so it's best for normal to oily skin types.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is moderate.
- Source
- natural
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
Myristic Acid can be useful, but watch for some irritation potential and possible clogging concerns.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Myristic Acid.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
Clogging risk
moderateMay be fine for many users but deserves caution if you are breakout-prone.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A 14-carbon saturated fatty acid derived from natural sources like coconut oil, palm kernel oil, and nutmeg. It is a white, waxy solid at room temperature.
How it works
In cleansers, myristic acid reacts with alkalis (like potassium hydroxide) to form soap molecules that trap dirt and oil so they can be rinsed away. In creams, it acts as an emulsifier, helping water and oil blend together smoothly.
Pros
Excellent foaming agent
Myristic acid creates a dense, creamy lather that makes cleansing feel satisfying and effective, especially for oily skin.
Natural origin
Derived from plant sources like coconut and palm oil, it fits well into natural and traditional soap formulations.
Cons and cautions
Can be drying
Its strong cleansing action can strip the skin's natural oils, leading to tightness or irritation, especially for dry or sensitive skin.
Moderate comedogenic risk
Rated around 3–4 on the comedogenic scale, it may clog pores for some individuals, particularly those prone to breakouts.
Best for
- People with normal to oily skin who enjoy a foamy cleanser
- Those looking for effective oil removal without harsh sulfates
Use caution if
- Individuals with dry, dehydrated, or sensitive skin
- Anyone prone to clogged pores or acne from fatty acids
Usage tips
Safety summary
Myristic acid is generally safe in rinse-off cosmetics at concentrations up to 10%. It can cause mild irritation in sensitive individuals and has a moderate comedogenic rating, so it's best suited for normal to oily skin types.
Research notes
Studies confirm myristic acid's role as an effective surfactant and emulsifier. Its comedogenic potential is documented in anecdotal and some clinical reports, but formal large-scale studies are limited.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; lower in leave-on formulations
- Regulatory status
- Approved as a safe cosmetic ingredient by the Cosmetic Ingredient Review (CIR) panel at typical use concentrations.
- Common uses
- Bar soaps, Facial cleansers, Body washes, Creams and lotions
- Environmental note
- Sourcing from palm oil can raise sustainability concerns; look for RSPO-certified palm or coconut-derived myristic acid.
Good to know
- Myristic acid is often listed alongside other fatty acids like lauric and stearic acid in soap bars.
- It is a key component in many traditional cold-process soaps for its hard bar and bubbly lather.
Common questions
What is Myristic Acid in beauty products?
Myristic acid is a type of fat found naturally in coconut oil, palm oil, and nutmeg butter. In skincare, it's used mainly in soaps and cleansers because it helps produce a rich, bubbly lather that lifts dirt and oil from the skin. It also helps thicken and stabilize creams. However, because it can strip natural oils, it may leave dry or sensitive skin feeling tight. Some people find it can clog pores, so it's best for normal to oily skin types.
What does Myristic Acid do in a beauty product?
In cleansers, myristic acid reacts with alkalis (like potassium hydroxide) to form soap molecules that trap dirt and oil so they can be rinsed away. In creams, it acts as an emulsifier, helping water and oil blend together smoothly.
Is Myristic Acid safe for most people?
Myristic acid is generally safe in rinse-off cosmetics at concentrations up to 10%. It can cause mild irritation in sensitive individuals and has a moderate comedogenic rating, so it's best suited for normal to oily skin types.
Who should be careful with Myristic Acid?
Individuals with dry, dehydrated, or sensitive skin Anyone prone to clogged pores or acne from fatty acids
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.