Ingredient review
Polyglycerin-20
INCI: Polyglycerin-20
A gentle, effective humectant that hydrates without stickiness, making it a great alternative to glycerin for sensitive or acne-prone skin.
In plain English
Polyglycerin-20 is a moisturizing ingredient made from natural glycerin. It works by pulling water from the air into the outer layer of your skin, helping it stay soft and hydrated. Unlike some other humectants, it feels light and non-sticky, so it's comfortable to wear under makeup or sunscreen. It also helps other ingredients spread evenly and feel smoother on the skin.
Review score
Safety, usefulness, and evidence
Strong fit for many routines
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
Easy yes for most routines
Polyglycerin-20 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 Polyglycerin-20.
- 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
Polyglycerin-20 is a polymer of glycerin, meaning it's made by linking several glycerin molecules together. Glycerin is a natural substance found in fats and oils, and this version is produced through a gentle, sustainable process. It is a clear, viscous liquid that dissolves easily in water and is very mild on the skin.
How it works
Polyglycerin-20 acts as a humectant, meaning it attracts and holds water molecules from the environment onto the skin's surface. This helps maintain the skin's moisture barrier, keeping it plump and resilient. Additionally, it has a slight film-forming property that can help reduce water loss (transepidermal water loss, or TEWL) without feeling heavy or occlusive.
Pros
Lightweight hydration
Polyglycerin-20 provides moisture without the heavy, tacky feeling that some humectants leave behind, making it ideal for daytime wear under makeup or sunscreen.
Gentle on sensitive skin
Because it is derived from natural glycerin and has a large molecular size, it is less likely to penetrate deeply and cause irritation, making it a safe choice for reactive or compromised skin barriers.
Cons and cautions
Less potent for very dry skin
Compared to hyaluronic acid or sodium PCA, polyglycerin-20 may not provide as intense hydration for severely dehydrated skin, especially in dry climates.
Limited research on long-term effects
While generally recognized as safe, there is less published research on polyglycerin-20 compared to more established humectants like glycerin, so its long-term benefits are less documented.
Best for
- Anyone looking for a lightweight, non-sticky moisturizer
- People with oily, combination, or acne-prone skin who want hydration without clogging pores
- Those with sensitive skin who react to common humectants like glycerin or hyaluronic acid
Use caution if
- Individuals with extremely dry or dehydrated skin may need a more potent humectant like hyaluronic acid or a combination with occlusives
Usage tips
Safety summary
Polyglycerin-20 is considered very safe for topical use. It has a low irritation and sensitization potential, and no significant toxicity has been reported in cosmetic concentrations. It is non-comedogenic and suitable for most skin types, including sensitive and acne-prone skin.
Research notes
Research on polyglycerin-20 is less extensive than on glycerin, but existing studies and safety assessments support its use as a mild humectant and skin conditioner. It is recognized by the Cosmetic Ingredient Review (CIR) panel as safe in current usage patterns.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics by major global regulators including the FDA (USA) and the European Commission. It is listed on the CosIng database and considered safe at typical use concentrations.
- Common uses
- Serums, Moisturizers, Cleansers, Toners
- Environmental note
- Polyglycerin-20 is biodegradable and can be sourced from renewable plant materials, making it a more environmentally friendly option compared to some synthetic humectants.
Good to know
- Polyglycerin-20 is often used in 'clean' or 'natural' beauty products because it can be derived from plant oils.
- It is considered non-comedogenic, meaning it is unlikely to clog pores.
- The number '20' refers to the average number of glycerin units in the polymer chain, which affects its feel and solubility.
Common questions
What is Polyglycerin-20 in beauty products?
Polyglycerin-20 is a moisturizing ingredient made from natural glycerin. It works by pulling water from the air into the outer layer of your skin, helping it stay soft and hydrated. Unlike some other humectants, it feels light and non-sticky, so it's comfortable to wear under makeup or sunscreen. It also helps other ingredients spread evenly and feel smoother on the skin.
What does Polyglycerin-20 do in a beauty product?
Polyglycerin-20 acts as a humectant, meaning it attracts and holds water molecules from the environment onto the skin's surface. This helps maintain the skin's moisture barrier, keeping it plump and resilient. Additionally, it has a slight film-forming property that can help reduce water loss (transepidermal water loss, or TEWL) without feeling heavy or occlusive.
Is Polyglycerin-20 safe for most people?
Polyglycerin-20 is considered very safe for topical use. It has a low irritation and sensitization potential, and no significant toxicity has been reported in cosmetic concentrations. It is non-comedogenic and suitable for most skin types, including sensitive and acne-prone skin.
Who should be careful with Polyglycerin-20?
Individuals with extremely dry or dehydrated skin may need a more potent humectant like hyaluronic acid or a combination with occlusives
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.