What Is Polyglyceryl-3 Myristate?
Polyglyceryl-3 Myristate is a plant-derived ingredient made by linking together three glycerin molecules then attaching myristic acid, a fatty acid that can be sourced from coconut or palm kernel oil. The result is a mild, wax-like substance that mixes oil and water, making it valuable in skin care and makeup. Interest in safer, renewable emulsifiers grew during the 1990s natural beauty movement, which led chemists to explore glycerin-based options. Because glycerin is already skin-friendly, turning it into an emulsifier was a logical step. Today most manufacturers create Polyglyceryl-3 Myristate through a controlled heating process called esterification, where glycerin polymers react with myristic acid under vacuum until they form a stable compound free of harsh residues.
You will spot Polyglyceryl-3 Myristate in moisturizers, milky cleansers, lightweight lotions, sunscreens, creamy foundations, clay or sheet masks and leave-on treatments that need a smooth, uniform texture.
Polyglyceryl-3 Myristate’s Cosmetic Benefits/Uses
This ingredient plays one key role in a formula and that role brings several practical advantages for both the product and your skin.
Emulsifying: Polyglyceryl-3 Myristate helps oil and water stay blended so lotions do not separate on the shelf or on your face. A stable emulsion feels silky, spreads evenly and delivers active ingredients more consistently which means a smoother application and better overall performance.
Who Can Use Polyglyceryl-3 Myristate
This emulsifier is generally suitable for all skin types. Its light, non-occlusive nature makes it comfortable for oily or combination skin while its ability to support a smooth emulsion benefits normal and dry skin. Sensitive skin usually tolerates it well since it is free of fragrance and known irritants; however, anyone with a rare allergy to coconut or palm derivatives should double-check the full ingredient list.
Because both the glycerin backbone and the myristic acid are sourced from plants, Polyglyceryl-3 Myristate aligns with vegan and vegetarian values as long as the final formula has not been tested on animals.
Current safety data shows no reproductive or developmental concerns, so products containing this ingredient are considered safe for use during pregnancy and breastfeeding. This is not medical advice and expectant or nursing mothers should still ask a doctor before starting new skincare.
The molecule does not increase photosensitivity, so it will not make skin more prone to sunburn. It is also biodegradable which can be a plus for users seeking eco-friendly options.
Potential Side Effects/Adverse Reactions
Responses to topical Polyglyceryl-3 Myristate vary person to person. The effects listed below are only potential outcomes and are unlikely for most users when the ingredient is used correctly by the manufacturer.
- Mild skin irritation presenting as temporary redness, itching or stinging
- Contact allergy in individuals highly sensitive to coconut or palm ingredients
- Breakouts in very acne-prone skin if the overall product is overly rich
If you notice any of these reactions stop using the product and consult a healthcare professional.
Comedogenic Rating
Rating: 1 / 5
Polyglyceryl-3 Myristate earns a low score because its bulky polyglycerin backbone reduces the ability of myristic acid to lodge inside pores. It creates a light, non occlusive film that is easily removed with normal cleansing, so the chance of clogged pores stays minimal.
Most people prone to acne or breakouts can use products containing this emulsifier without noticing extra bumps.
Keep in mind that the overall formula matters; if the product also contains richer oils or waxes the comedogenic load could rise even if this single ingredient is low risk.
Summary
Polyglyceryl-3 Myristate is mainly valued for its emulsifying talent. By linking three glycerin units to myristic acid it bridges oil and water so creams, lotions and makeup stay smooth and uniform from the first pump to the last swipe. The ingredient shows up in a fair number of modern, plant forward formulas though it is not as ubiquitous as classic emulsifiers like glyceryl stearate.
Safety data points to a gentle profile with rare irritation and a very low comedogenic rating, making it suitable for almost all skin types including sensitive and acne prone. As with any new skincare, patch test a small area first to be sure your skin agrees with the full formula.