Ingredient review
Calcium Polygamma-Glutamate
INCI: CALCIUM POLY-GAMMA-GLUTAMATE
A gentle, plant-based humectant that holds water on the skin's surface, offering a smoother feel and lasting hydration without stickiness.
In plain English
Calcium Polygamma-Glutamate is a natural ingredient made by fermenting soybeans. It acts like a sponge on your skin, pulling in moisture from the air and holding it there. This helps your skin feel softer, smoother, and more hydrated without leaving a greasy or sticky residue. It's often used as a gentler alternative to hyaluronic acid.
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
- biotech
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Calcium Polygamma-Glutamate 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 Calcium Polygamma-Glutamate.
- 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 salt form of poly-gamma-glutamic acid, a natural polymer produced during the fermentation of soybeans (often from Bacillus subtilis). It is a large molecule that forms a flexible film on the skin.
How it works
It sits on the surface of the skin and attracts water molecules from the environment, a property called humectancy. Its large molecular size means it stays mostly on the outer layer of the skin (the stratum corneum), where it helps keep the skin barrier hydrated and plump. It also forms a very thin, flexible film that can temporarily smooth fine lines and improve the feel of the skin.
Pros
Gentle hydration
It provides effective surface moisture without the stinging or irritation that some people experience with other humectants like hyaluronic acid.
Non-sticky finish
Unlike some other film-forming humectants, it leaves a smooth, velvety feel on the skin rather than a tacky or glue-like residue.
Cons and cautions
Humidity dependent
Its ability to draw moisture from the air is reduced in very dry climates, so it works best when layered over damp skin or in a humid environment.
Surface-level only
Because of its large molecular size, it does not penetrate deeply into the skin, so it won't provide the same deep plumping effect as smaller humectants.
Best for
- Anyone looking for a gentle, non-irritating hydrating ingredient
- People with dry or dehydrated skin who want a plumping effect without oiliness
- Those with sensitive skin who react to hyaluronic acid
Use caution if
- People who prefer extremely lightweight, watery textures may find it slightly heavier than glycerin
Usage tips
Safety summary
Calcium Polygamma-Glutamate is considered very safe for cosmetic use. It has a low irritation and comedogenic risk, and no significant safety concerns have been reported in the available scientific literature.
Research notes
Research on calcium polygamma-glutamate is less extensive than on hyaluronic acid, but existing studies indicate it is an effective humectant with good skin compatibility. Its film-forming properties have been shown to improve skin smoothness and reduce transepidermal water loss (TEWL, the amount of water that evaporates from your skin) in controlled tests.
Common label clues
- Typical concentration
- 0.1% to 1%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and most major markets. No known restrictions or safety concerns at typical use levels.
- Common uses
- Serums, Moisturizers, Sheet masks, Eye creams
- Environmental note
- Produced via fermentation of plant-based substrates, which is generally considered a low-impact, sustainable process compared to synthetic alternatives.
Good to know
- It is often derived from non-GMO soybeans through a fermentation process, making it appealing for natural or eco-conscious formulations.
- It is vegan-friendly and generally considered safe for all skin types.
Common questions
What is Calcium Polygamma-Glutamate in beauty products?
Calcium Polygamma-Glutamate is a natural ingredient made by fermenting soybeans. It acts like a sponge on your skin, pulling in moisture from the air and holding it there. This helps your skin feel softer, smoother, and more hydrated without leaving a greasy or sticky residue. It's often used as a gentler alternative to hyaluronic acid.
What does Calcium Polygamma-Glutamate do in a beauty product?
It sits on the surface of the skin and attracts water molecules from the environment, a property called humectancy. Its large molecular size means it stays mostly on the outer layer of the skin (the stratum corneum), where it helps keep the skin barrier hydrated and plump. It also forms a very thin, flexible film that can temporarily smooth fine lines and improve the feel of the skin.
Is Calcium Polygamma-Glutamate safe for most people?
Calcium Polygamma-Glutamate is considered very safe for cosmetic use. It has a low irritation and comedogenic risk, and no significant safety concerns have been reported in the available scientific literature.
Who should be careful with Calcium Polygamma-Glutamate?
People who prefer extremely lightweight, watery textures may find it slightly heavier than 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.