Polyglutaminsyra (PGA) – hudvårdsingrediens för bättre hud | Skinroller

Polyglutamic Acid (PGA)

  • April 04, 2026
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  • Skriven av Skinroller
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  • 3 min läsning

What is Polyglutamic Acid?

Polyglutamic acid, often abbreviated as PGA, is a powerful humectant formed during the fermentation of soybeans. The molecule is relatively large and works primarily on the skin's surface, where it acts as a moisture magnet and attracts abundant water.

On the surface, it forms a protective film that counteracts moisture evaporation during the day, giving the skin a smooth, soft, and plump feel. PGA also has the unique property of being able to help protect the skin's own hyaluronic acid from breaking down.

Benefits: Intensely moisturizing, Plumping, Prevents moisture loss, Provides glow
Categories: Dry skin conditions.
Skin types: All skin types, Dry skin, Dehydrated skin

Imagine an invisible moisture shield for your skin. An ingredient that not only provides moisture but also forms a protective film that locks it in and provides an immediately smooth and silky surface. That is polyglutamic acid, also known as PGA. It is a superstar at hydration and a close relative to the more well-known hyaluronic acid.

Polyglutamic acid is a large molecule formed during the fermentation of soybeans. Due to its size, it works primarily on the skin's surface. There, it acts as a powerful moisture magnet that attracts and binds large amounts of water. The result is skin that feels deeply hydrated, plump, and dewy all day.

Benefits of Polyglutamic Acid

Polyglutamic acid has quickly become a favorite for anyone seeking maximum hydration. It is known for its ability to provide an immediate plumping effect and a soft, smooth feel. Here are its most important benefits:

  • Provides immediate and intense moisture: PGA is one of the most powerful humectants available. It forms a hydrating film on the skin that provides an immediate feeling of comfort and plumpness.
  • Locks moisture into the skin: The film that PGA creates acts as a protective lid. It prevents the moisture in your skin from evaporating during the day, providing longer-lasting hydration.
  • Improves skin elasticity: When the skin is maximally hydrated, its suppleness and elasticity improve. Fine dehydration lines become less visible, and the skin gets a more youthful appearance.
  • Boost your hyaluronic acid: A unique benefit is that PGA can help protect the skin's own hyaluronic acid from breaking down. This makes it work fantastically well in combination with products containing hyaluronic acid.

Skin types and uses

Polyglutamic acid is an excellent choice for all skin types, but it is a true hero for those with dry, surface-dry, or dehydrated skin thirsting for moisture. It is also perfect for anyone who wants an extra smooth and hydrated base under makeup.

  • For dry or dehydrated skin that feels tight and lacks moisture.
  • To immediately plump the skin and reduce the visibility of fine lines.
  • To give a dewy glow to tired and dull skin.
  • As a moisture booster in your routine, especially during dry winter months.

How to use Polyglutamic Acid

It is easy to include this moisture hero in your routine. It is mild and uncomplicated. Here are our best tips:

  • Application: Most commonly used in serums. Apply a few drops to cleansed skin. You can advantageously apply it to slightly damp skin to give it extra water to bind.
  • Frequency: It is so mild that it can be used every day, both morning and evening.
  • Timing: Use it after cleansing but before your regular moisturizer. The moisturizer helps seal in the PGA and its moisturizing effects.
  • Combine with: PGA is an excellent team player. It works with all other ingredients. It is especially effective when used together with hyaluronic acid for a double moisture effect.

FAQ

Is Polyglutamic Acid safe for sensitive skin?

Yes, absolutely. Thanks to its large molecular size that works on the surface, the risk of irritation is extremely low. This makes it an excellent and safe choice for sensitive skin that needs moisture.

Can I use Polyglutamic Acid when pregnant or breastfeeding?

Yes. Polyglutamic acid works locally on the skin's surface and is considered completely safe to use during pregnancy and breastfeeding.

Is PGA better than Hyaluronic Acid?

They are not competitors, but best friends. Think of it like this: Hyaluronic acid hydrates the skin at different levels, while Polyglutamic acid acts as a protective, moisturizing blanket on top. PGA also helps preserve the skin's own hyaluronic acid. They are like a dynamic duo – together they provide unbeatable and complete hydration.

Can PGA replace my moisturizer?

No, it should be seen as a complement. PGA is a humectant that binds water. A moisturizer often also contains softening and protective ingredients (emollients and occlusives) that are necessary to lock in the moisture. Use your PGA serum first, and then follow up with your cream.

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