Ingredient review
Ethyl Morrhuate
INCI: ETHYL MORRHUATE
Ethyl Morrhuate is a gentle emollient from cod liver oil that helps soften skin without clogging pores, but its benefits are similar to many other oils.
In plain English
Ethyl Morrhuate is an ingredient made from cod liver oil that has been chemically modified to be more stable and less fishy-smelling. In skincare, it works as an emollient, meaning it helps soften and smooth the skin by filling in the spaces between skin cells. It also contains omega-3 fatty acids, which can support the skin's natural barrier. Because it's lightweight and non-greasy, it's often used in moisturizers and lip products for a silky feel without heavy residue.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- natural
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Ethyl Morrhuate is generally a lower-concern ingredient when the full formula suits your skin.
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 Ethyl Morrhuate.
- 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
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Ethyl Morrhuate is the ethyl ester of the fatty acids found in cod liver oil. It is produced by reacting cod liver oil with ethanol, which creates a more stable, less odorous ingredient that is easier to formulate into cosmetics.
How it works
When applied to the skin, Ethyl Morrhuate spreads easily and forms a thin, protective layer that reduces water loss (transepidermal water loss, or TEWL). This helps keep the skin hydrated and supple. The omega-3 fatty acids it contains may also support the skin's natural barrier function and have mild anti-inflammatory properties.
Pros
Gentle and non-irritating
Ethyl Morrhuate has a low irritation risk and is unlikely to cause stinging or redness, making it suitable for sensitive skin types.
Lightweight hydration
Unlike heavier oils, it absorbs quickly without leaving a greasy film, so it works well under makeup or in daytime moisturizers.
Cons and cautions
Not vegan-friendly
Since it is derived from cod liver oil, it is not suitable for those following a vegan or strict plant-based lifestyle.
Potential odor issues
Even though the ethylation process reduces the fishy smell, some formulations may still have a faint odor that can be off-putting to sensitive noses.
Best for
- People with dry or dehydrated skin
- Those looking for a lightweight, non-comedogenic emollient
- Anyone wanting to support skin barrier health
Use caution if
- Vegans or those avoiding animal-derived ingredients
- Individuals with fish allergies (rare, but possible sensitivity)
Usage tips
Safety summary
Ethyl Morrhuate is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, individuals with fish allergies should exercise caution, and it is not suitable for vegan formulations.
Research notes
Research on Ethyl Morrhuate specifically is limited, but its parent ingredient, cod liver oil, has been studied for skin barrier support and anti-inflammatory effects. The ethyl ester form is primarily used for improved stability and formulation ease.
Common label clues
- Typical concentration
- Typically 1–5% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Moisturizers, Lip balms, Body lotions, Anti-aging creams
- Environmental note
- Sourced from cod liver oil, which is a byproduct of the fishing industry. Sustainability depends on the fishery practices of the supplier.
Good to know
- Ethyl Morrhuate is more stable than plain cod liver oil and less likely to go rancid.
- It is often combined with other emollients to create a balanced texture.
Common questions
What is Ethyl Morrhuate in beauty products?
Ethyl Morrhuate is an ingredient made from cod liver oil that has been chemically modified to be more stable and less fishy-smelling. In skincare, it works as an emollient, meaning it helps soften and smooth the skin by filling in the spaces between skin cells. It also contains omega-3 fatty acids, which can support the skin's natural barrier. Because it's lightweight and non-greasy, it's often used in moisturizers and lip products for a silky feel without heavy residue.
What does Ethyl Morrhuate do in a beauty product?
When applied to the skin, Ethyl Morrhuate spreads easily and forms a thin, protective layer that reduces water loss (transepidermal water loss, or TEWL). This helps keep the skin hydrated and supple. The omega-3 fatty acids it contains may also support the skin's natural barrier function and have mild anti-inflammatory properties.
Is Ethyl Morrhuate safe for most people?
Ethyl Morrhuate is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, individuals with fish allergies should exercise caution, and it is not suitable for vegan formulations.
Who should be careful with Ethyl Morrhuate?
Vegans or those avoiding animal-derived ingredients Individuals with fish allergies (rare, but possible sensitivity)
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.