Ingredient review
Isobutyl Myristate
INCI: Isobutyl Myristate
A lightweight synthetic emollient that makes products feel silky, but may clog pores for acne-prone skin.
In plain English
Isobutyl Myristate is a man-made oil-like ingredient added to skincare and beauty products to make them feel smooth and spread easily on the skin. It helps lotions and creams absorb without leaving a greasy residue. However, because it can block pores, people with oily or acne-prone skin may want to use it with caution.
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 low; clogging risk is moderate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
Isobutyl Myristate can be useful, but watch for 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 Isobutyl Myristate.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
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
Isobutyl Myristate is a synthetic ester derived from myristic acid (a fatty acid found in nutmeg and other plants) and isobutyl alcohol. It is a clear, lightweight liquid used as an emollient and skin conditioner.
How it works
It sits on the skin's surface to soften and smooth the outer layer, reducing water loss and improving the feel of the product. It also helps dissolve other ingredients and enhances the absorption of active compounds.
Pros
Lightweight texture
Gives a silky, non-greasy feel that absorbs quickly, making it ideal for daytime moisturizers and makeup removers.
Improves product performance
Helps other ingredients spread evenly and can enhance the absorption of active components into the skin.
Cons and cautions
May clog pores
Rated as moderately comedogenic, meaning it can block pores and trigger breakouts in acne-prone or oily skin types.
Synthetic origin
As a lab-created ingredient, it may not appeal to those seeking fully natural or plant-based formulations.
Best for
- People with dry or normal skin looking for a lightweight moisturizer
- Those who enjoy a silky, fast-absorbing texture in their products
Use caution if
- Individuals with oily, acne-prone, or easily clogged skin
Usage tips
Safety summary
Isobutyl Myristate is considered safe for most skin types at typical cosmetic concentrations. The main concern is its moderate comedogenic rating, which can cause breakouts in susceptible individuals. It is not a known irritant or sensitizer.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that isobutyl myristate is safe as used in cosmetics. Studies focus on its skin penetration enhancement and comedogenicity, but long-term human data is limited.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission, with no known restrictions at typical concentrations.
- Common uses
- Moisturizers, Cleansers, Makeup removers, Fragrance products
- Environmental note
- As a synthetic ester, it is not biodegradable in all conditions, but it is not considered a major environmental concern at typical usage levels.
Good to know
- Isobutyl Myristate is often found in makeup removers because it helps dissolve waterproof makeup and sunscreen.
- It is not the same as Myristyl Myristate, which is a thicker emollient.
Common questions
What is Isobutyl Myristate in beauty products?
Isobutyl Myristate is a man-made oil-like ingredient added to skincare and beauty products to make them feel smooth and spread easily on the skin. It helps lotions and creams absorb without leaving a greasy residue. However, because it can block pores, people with oily or acne-prone skin may want to use it with caution.
What does Isobutyl Myristate do in a beauty product?
It sits on the skin's surface to soften and smooth the outer layer, reducing water loss and improving the feel of the product. It also helps dissolve other ingredients and enhances the absorption of active compounds.
Is Isobutyl Myristate safe for most people?
Isobutyl Myristate is considered safe for most skin types at typical cosmetic concentrations. The main concern is its moderate comedogenic rating, which can cause breakouts in susceptible individuals. It is not a known irritant or sensitizer.
Who should be careful with Isobutyl Myristate?
Individuals with oily, acne-prone, or easily clogged skin
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.