What are the benefits of polyglutamic acid?
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What is polyglutamic acid?
Polyglutamic acid, also known as PGA, is a natural polymer derived from glutamic acid. This substance is a key component of the amino acid family and is often extracted from natural products like soy and wheat.
This polymer has the unique ability to retain water, making it an excellent moisturizing agent for the skin.
What are the benefits of polyglutamic acid?
- Intense Hydration: One of the main benefits of polyglutamic acid is its ability to trap water. Unlike other hydrating agents, polyglutamic acid is able to hold up to 10, 000 times its weight in water, creating a moisture reservoir for the skin. By intensely hydrating the skin, this acid can help prevent excess sebum production in people with naturally oilier skin. Adequate hydration can balance sebum production by signaling to the skin that it doesn't need to produce as much oil to compensate for dryness.
- Stimulates Hyaluronic Acid Production: Polyglutamic acid works in synergy with the skin's natural hyaluronic acid, boosting its production. This helps maintain optimal moisture balance and prevents skin dehydration.
- Forms a Protective Film: When applied topically, polyglutamic acid forms a protective film on the surface of the skin. This film not only seals in moisture but also acts as a protective barrier against external aggressors like pollution and free radicals.
- Suitable for All Skin Types: Whether you have dry, oily, combination, or sensitive skin, polyglutamic acid is versatile and can benefit all skin types. It adapts to individual needs, offering tailored hydration.
- Reduces Signs of Aging: Thanks to its ability to maintain optimal hydration, polyglutamic acid can help reduce the appearance of fine lines and wrinkles, leaving skin looking firmer and younger. This can also positively influence the visibility of pores, as firmer skin tends to appear more even.
What are the differences between hyaluronic acid and polyglutamic acid?
While hyaluronic acid and polyglutamic acid share similarities as skin hydrators, there are key differences between the two.
- Molecular Size: Hyaluronic acid comes in different forms and various molecular weights, which means it can penetrate different layers of the skin. In contrast, polyglutamic acid forms a protective film on the surface, not penetrating as deeply as hyaluronic acid.
- Water Retention Capacity: Polyglutamic acid has an exceptional water retention capacity, surpassing that of hyaluronic acid. This makes it a preferred choice for those seeking intense hydration.
- Protective Film: Unlike hyaluronic acid, polyglutamic acid can form a protective film on the surface. This film acts as a barrier, preserving moisture and protecting the skin from external elements.
Using Polyglutamic Acid
Polyglutamic acid can be incorporated into your skincare routine in various ways. Here are some tips for use:
Hydrating Serum: Choose serums containing polyglutamic acid for maximum hydration. Apply the serum morning and evening to clean skin before your moisturizer.
Eye Contour: Due to its ability to reduce the appearance of fine lines, polyglutamic acid can be particularly beneficial in products designed for the eye area. Choose creams or serums specifically formulated for this delicate zone.
Surface Protection: Use products containing polyglutamic acid as a protective base before applying makeup. This provides continuous hydration throughout the day.

What ingredients can be combined with polyglutamic acid?
Polyglutamic acid can be combined with various ingredients to create synergistic cosmetic formulations, offering complementary benefits for the skin. Here are some ingredients commonly associated with polyglutamic acid:
- Hyaluronic Acid: Combining polyglutamic acid with hyaluronic acid, known for its hydrating properties, can create a powerful moisturizing combination. These two ingredients work together to retain water, maintaining skin hydration and helping to reduce the appearance of wrinkles and fine lines.
- Vitamin C: Vitamin C is known for its antioxidant and brightening properties. By combining it with polyglutamic acid, you can create a serum that helps protect the skin against free radicals while promoting radiance and luminosity.
- Peptides: Peptides are essential components for skin regeneration. In combination with polyglutamic acid, they can help strengthen skin firmness and stimulate collagen production, contributing to more toned skin.
- Licorice: Licorice extract is known for its soothing and anti-inflammatory properties. Combined with polyglutamic acid, it can help calm irritated skin and reduce redness.
- Ceramides : Ceramides are natural lipids found in the skin that help maintain the skin barrier. Combined with polyglutamic acid, they strengthen the integrity of the skin barrier, thereby reducing moisture loss.
- Retinol: Retinol, a form of vitamin A, is often used to stimulate cell renewal. In combination with polyglutamic acid, it can help improve skin texture, reduce imperfections, and promote an even complexion.
- Niacinamide (Vitamin B3): Niacinamide is valued for its multiple benefits, including improving skin texture and controlling sebum production. Combined with polyglutamic acid, it can help maintain skin balance.
- Aloe Vera Extract: Aloe vera is known for its soothing and hydrating properties. By combining it with polyglutamic acid, you can create products that offer both intense hydration and relief from skin irritations.

