Ingredient review
Trimyristin
INCI: Trimyristin
A gentle, plant-derived emollient that helps maintain skin softness without clogging pores.
In plain English
Trimyristin is a type of fat molecule made from myristic acid (a fatty acid found naturally in nutmeg and other plants) and glycerin. In skincare, it works as an emollient, meaning it fills in the tiny gaps between skin cells to create a smoother, softer surface. It also helps other ingredients spread more evenly and gives products a silky feel. Because it's non-greasy and low on the comedogenic scale, it's a good choice for people with oily or acne-prone skin who still want moisture.
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
Trimyristin 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 Trimyristin.
- 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
Trimyristin is a triglyceride ester derived from myristic acid and glycerin. It is commonly sourced from nutmeg oil or other plant-based fats. In cosmetics, it functions primarily as an emollient and skin-conditioning agent.
How it works
When applied to the skin, trimyristin forms a thin, non-occlusive film that helps reduce water loss and smooth the skin's surface. It also improves the texture and spreadability of formulations, making creams and lotions feel more luxurious without leaving a heavy residue.
Pros
Non-comedogenic emollient
Trimyristin has a low comedogenic rating, meaning it is unlikely to clog pores. This makes it a safe choice for acne-prone or oily skin types who still need hydration.
Improves product feel
It gives creams and lotions a silky, smooth texture without a greasy after-feel, enhancing the overall user experience.
Cons and cautions
Limited moisturizing power
As a lightweight emollient, trimyristin may not provide enough moisture for very dry or dehydrated skin, which may require richer occlusives or humectants.
Less researched than alternatives
Compared to ingredients like caprylic/capric triglyceride, trimyristin has fewer studies on its long-term skin benefits and safety.
Best for
- People with oily or combination skin looking for a lightweight moisturizer
- Anyone seeking a non-comedogenic emollient in their skincare routine
Use caution if
- Those with a known allergy to nutmeg or myristic acid derivatives (rare)
Usage tips
Safety summary
Trimyristin is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, and no significant toxicity concerns have been reported in available research.
Research notes
Research on trimyristin is limited but consistent with other triglyceride emollients. It is well-tolerated in skin patch tests and has been used safely in cosmetics for decades. More studies are needed to compare its efficacy directly with other emollients.
Common label clues
- Typical concentration
- 0.5% to 5% in leave-on products; higher in wash-off products
- Regulatory status
- Approved as a safe cosmetic ingredient by the Cosmetic Ingredient Review (CIR) panel and the European Commission. No concentration restrictions in leave-on or rinse-off products.
- Common uses
- Moisturizers, Lip balms, Body lotions, Bar soaps
- Environmental note
- Trimyristin is biodegradable and typically derived from renewable plant sources. However, if sourced from palm oil, sustainability practices may vary.
Good to know
- Trimyristin is often used in bar soaps to improve lather and skin feel.
- It is considered vegan-friendly when sourced from plant oils like nutmeg or palm.
Common questions
What is Trimyristin in beauty products?
Trimyristin is a type of fat molecule made from myristic acid (a fatty acid found naturally in nutmeg and other plants) and glycerin. In skincare, it works as an emollient, meaning it fills in the tiny gaps between skin cells to create a smoother, softer surface. It also helps other ingredients spread more evenly and gives products a silky feel. Because it's non-greasy and low on the comedogenic scale, it's a good choice for people with oily or acne-prone skin who still want moisture.
What does Trimyristin do in a beauty product?
When applied to the skin, trimyristin forms a thin, non-occlusive film that helps reduce water loss and smooth the skin's surface. It also improves the texture and spreadability of formulations, making creams and lotions feel more luxurious without leaving a heavy residue.
Is Trimyristin safe for most people?
Trimyristin is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, and no significant toxicity concerns have been reported in available research.
Who should be careful with Trimyristin?
Those with a known allergy to nutmeg or myristic acid derivatives (rare)
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.