Ingredient review
Glyceryl Dimethylsiloxanes
INCI: Glyceryl Dimethylsiloxanes
A gentle silicone emollient that improves product texture and leaves skin feeling smooth without clogging pores.
In plain English
Glyceryl dimethylsiloxanes is a type of silicone oil that is added to skincare and makeup to make them feel silky and spread easily. It sits on top of the skin, creating a lightweight, breathable film that helps lock in moisture and gives a smooth, velvety finish. Unlike some heavier silicones, it is generally considered non-comedogenic, meaning it is unlikely to clog pores.
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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Glyceryl Dimethylsiloxanes 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 Glyceryl Dimethylsiloxanes.
- 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
A synthetic silicone polymer modified with a glycerin-like group, making it more compatible with water and other ingredients. It is a clear, odorless liquid that is commonly used in cosmetics as an emollient and skin conditioner.
How it works
It forms a thin, flexible film on the skin's surface that reduces water loss (transepidermal water loss, or TEWL) and provides a smooth, lubricated feel. Its silicone backbone gives it a silky texture, while the glyceryl group adds a touch of moisturizing ability and helps it blend with other ingredients.
Pros
Silky, smooth texture
Creates a velvety feel on the skin that helps makeup glide on and reduces friction during application.
Low irritation potential
Rarely causes stinging or redness, making it suitable for sensitive skin types.
Cons and cautions
Not biodegradable
As a synthetic silicone, it does not break down easily in the environment, which may be a concern for eco-conscious users.
Can feel heavy on oily skin
In high concentrations, it may contribute to a slightly slick or heavy sensation for those with very oily skin.
Best for
- People with dry or normal skin looking for a smooth, hydrating finish
- Anyone who wants a primer-like feel under makeup
Use caution if
- Those who strictly avoid silicones in their skincare routine
Usage tips
Safety summary
Glyceryl dimethylsiloxanes is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic rating, and no significant safety concerns have been raised by regulatory bodies.
Research notes
Silicones in cosmetics have been extensively reviewed by the Cosmetic Ingredient Review (CIR) panel and are considered safe. Specific studies on glyceryl dimethylsiloxanes are limited, but its chemical class is well-tolerated.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) with no known restrictions at typical concentrations.
- Common uses
- Moisturizers, Serums, Primers, Sunscreens, Makeup foundations
- Environmental note
- Silicones like this one are not readily biodegradable and can accumulate in aquatic environments. Some brands are moving toward more eco-friendly alternatives.
Good to know
- Glyceryl dimethylsiloxanes is considered a 'modified silicone' that is slightly more water-friendly than standard dimethicone.
- It is often used in combination with other silicones to fine-tune the feel of a product.
Common questions
What is Glyceryl Dimethylsiloxanes in beauty products?
Glyceryl dimethylsiloxanes is a type of silicone oil that is added to skincare and makeup to make them feel silky and spread easily. It sits on top of the skin, creating a lightweight, breathable film that helps lock in moisture and gives a smooth, velvety finish. Unlike some heavier silicones, it is generally considered non-comedogenic, meaning it is unlikely to clog pores.
What does Glyceryl Dimethylsiloxanes do in a beauty product?
It forms a thin, flexible film on the skin's surface that reduces water loss (transepidermal water loss, or TEWL) and provides a smooth, lubricated feel. Its silicone backbone gives it a silky texture, while the glyceryl group adds a touch of moisturizing ability and helps it blend with other ingredients.
Is Glyceryl Dimethylsiloxanes safe for most people?
Glyceryl dimethylsiloxanes is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic rating, and no significant safety concerns have been raised by regulatory bodies.
Who should be careful with Glyceryl Dimethylsiloxanes?
Those who strictly avoid silicones in their skincare routine
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.