Is Isocetyl Stearate Comedogenic?
Comedogenic rating: 4/5 — Likely to clog pores
Isocetyl Stearate is an emollient ester that gives products a smooth, silky slip and cushiony feel. In cosmetics it is typically found in moisturizers, foundations, lipsticks, primers and sunscreens.
| Comedogenic rating | 4/5 — Likely to clog pores |
|---|---|
| Pore-clogging | Likely |
| Fungal-acne safe | No — potential trigger |
| Category | Ester |
Is Isocetyl Stearate comedogenic?
Yes — Isocetyl Stearate is considered highly comedogenic, scoring 4 out of 5. That means it has a strong tendency to block pores and is a well-known trigger for closed comedones, blackheads and breakouts on acne-prone skin. If your skin is oily or congestion-prone, Isocetyl Stearate is one of the ingredients most worth avoiding in leave-on facial products, though it can still be fine in short-contact rinse-off products or on the body.
Does Isocetyl Stearate cause fungal acne?
Separately from pore-clogging, Isocetyl Stearate is considered a potential fungal-acne (Malassezia) trigger. Fungal acne — properly called Malassezia folliculitis — appears as small, uniform, sometimes itchy bumps, and is fed by certain oils, fatty acids and esters. This is a different problem from comedogenic clogging, so if you are prone to fungal acne you may want to avoid Isocetyl Stearate even when its comedogenic rating is low.
Should you use Isocetyl Stearate if you're acne-prone?
If you are acne-prone, it is safest to keep Isocetyl Stearate away from your face in leave-on products. It can still be useful for dry body skin, hair, or in cleansers where it is quickly rinsed off. Normal and dry skin types often tolerate it without issue.
Safer alternatives to Isocetyl Stearate
How Isocetyl Stearate compares to other esters
| Ingredient | Rating | Pore-clogging |
|---|---|---|
| Isocetyl Stearate | 4/5 | Likely |
| Caprylic/Capric Triglyceride | 1/5 | Unlikely |
| Butyl Stearate | 3/5 | Likely |
| Decyl Oleate | 3/5 | Likely |
| Ethylhexyl Palmitate | 4/5 | Likely |
| Isopropyl Palmitate | 4/5 | Likely |
| Isostearyl Isostearate | 4/5 | Likely |
Frequently asked questions
Is Isocetyl Stearate comedogenic?
Yes — Isocetyl Stearate is considered highly comedogenic, scoring 4 out of 5. That means it has a strong tendency to block pores and is a well-known trigger for closed comedones, blackheads and breakouts on acne-prone skin. If your skin is oily or congestion-prone, Isocetyl Stearate is one of the ingredients most worth avoiding in leave-on facial products, though it can still be fine in short-contact rinse-off products or on the body.
Does Isocetyl Stearate cause fungal acne?
Separately from pore-clogging, Isocetyl Stearate is considered a potential fungal-acne (Malassezia) trigger. Fungal acne — properly called Malassezia folliculitis — appears as small, uniform, sometimes itchy bumps, and is fed by certain oils, fatty acids and esters. This is a different problem from comedogenic clogging, so if you are prone to fungal acne you may want to avoid Isocetyl Stearate even when its comedogenic rating is low.
Is Isocetyl Stearate safe for acne-prone skin?
If you are acne-prone, it is safest to keep Isocetyl Stearate away from your face in leave-on products. It can still be useful for dry body skin, hair, or in cleansers where it is quickly rinsed off. Normal and dry skin types often tolerate it without issue.
What products is Isocetyl Stearate found in?
Isocetyl Stearate is an emollient ester that gives products a smooth, silky slip and cushiony feel, and is commonly found in moisturizers, foundations, lipsticks, primers and sunscreens.
What can I use instead of Isocetyl Stearate?
Lower-risk swaps include Squalane, all of which rate lower on the comedogenic scale.
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