Ingredient review
Maltose
INCI: MALTOSE
Maltose is a gentle, natural humectant that helps attract and hold moisture in the skin without irritation or clogging pores.
In plain English
Maltose is a type of sugar made from two glucose molecules. In skincare, it acts like a moisture magnet, pulling water from the air into the outer layer of your skin to keep it hydrated and plump. It's very mild and unlikely to cause irritation, making it a good option for sensitive skin. Unlike some other sugars, it doesn't feel sticky on the skin and can also help other ingredients absorb better.
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
Maltose 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 Maltose.
- 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
Maltose is a disaccharide sugar composed of two glucose units. It is naturally found in germinating grains like barley and is also produced during the breakdown of starch. In cosmetics, it is used as a humectant and skin-conditioning agent.
How it works
Maltose works by attracting water molecules from the environment and binding them to the skin's surface, increasing hydration. It also forms a thin, non-occlusive film that helps reduce water loss. Some research suggests it may enhance the penetration of other active ingredients by temporarily loosening the bonds between skin cells.
Pros
Very gentle on skin
Maltose has a low irritation and comedogenic risk, making it suitable for sensitive, acne-prone, or reactive skin types.
Lightweight hydration
It provides moisture without a heavy or sticky feel, so it works well in lightweight serums and gel moisturizers.
Cons and cautions
Moderate humectant power
In dry climates, maltose is less effective at pulling moisture from the air compared to stronger humectants like glycerin or hyaluronic acid.
Potential tackiness at high levels
If used in very high concentrations (above 10%), maltose can leave a slightly sticky residue on the skin.
Best for
- People with dry or dehydrated skin looking for a mild humectant
- Those with sensitive or reactive skin who want to avoid common irritants
Use caution if
- Individuals with very dry skin in low-humidity environments may need a more potent humectant like glycerin
Usage tips
Safety summary
Maltose is considered very safe for topical use. It has low irritation and sensitization potential, and no known toxicity at typical cosmetic concentrations. It is non-comedogenic and suitable for all skin types, including sensitive and acne-prone skin.
Research notes
Research supports maltose's role as a mild humectant and skin-conditioning agent. Studies indicate it can improve skin hydration and barrier function without irritation. Some evidence suggests it may enhance the delivery of other active ingredients, though more research is needed to confirm this effect in humans.
Common label clues
- Typical concentration
- 0.5–5% in leave-on products; up to 10% in rinse-off products
- Regulatory status
- Approved as a safe cosmetic ingredient by the FDA and the Cosmetic Ingredient Review (CIR) panel. No concentration restrictions in leave-on or rinse-off products.
- Common uses
- Moisturizers, Serums, Cleansers, Masks
- Environmental note
- Maltose is typically derived from plant starches (corn, barley, rice) and is biodegradable, making it a low-environmental-impact ingredient.
Good to know
- Maltose is often used in combination with other humectants to balance texture and hydration.
- It is sometimes listed as 'malt sugar' on natural or organic product labels.
Common questions
What is Maltose in beauty products?
Maltose is a type of sugar made from two glucose molecules. In skincare, it acts like a moisture magnet, pulling water from the air into the outer layer of your skin to keep it hydrated and plump. It's very mild and unlikely to cause irritation, making it a good option for sensitive skin. Unlike some other sugars, it doesn't feel sticky on the skin and can also help other ingredients absorb better.
What does Maltose do in a beauty product?
Maltose works by attracting water molecules from the environment and binding them to the skin's surface, increasing hydration. It also forms a thin, non-occlusive film that helps reduce water loss. Some research suggests it may enhance the penetration of other active ingredients by temporarily loosening the bonds between skin cells.
Is Maltose safe for most people?
Maltose is considered very safe for topical use. It has low irritation and sensitization potential, and no known toxicity at typical cosmetic concentrations. It is non-comedogenic and suitable for all skin types, including sensitive and acne-prone skin.
Who should be careful with Maltose?
Individuals with very dry skin in low-humidity environments may need a more potent humectant like glycerin
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.