The INKEY List Polyglutamic Acid Serum — 1.0 fl oz Face Hydrating Serum, 3% PGA Lightweight

The INKEY List Polyglutamic Acid Serum is a lightweight face serum that locks in surface moisture up to four times more effectively than hyaluronic acid to visibly smooth, brighten, and plump skin.

This serum delivers targeted hydration using a 3% high-molecular-weight polyglutamic acid formula engineered to bolster water retention on the skin's outer layers. Its silky, non-greasy texture layers easily under moisturizers or makeup, helping skin look softer with reduced appearance of fine lines while promoting a more even, luminous tone.

How does polyglutamic acid hydrate skin differently than hyaluronic acid?

Polyglutamic acid (PGA) binds water at the skin surface and can hold more moisture per molecule than hyaluronic acid, making it especially effective for visible, immediate surface hydration. Because this formula uses high-molecular-weight PGA, it stays on the outer layers to smooth texture and reinforce the skin’s moisture barrier without heavy residue.

• 3% high-molecular-weight PGA concentrates hydration where skin needs it most
• Holds up to four times more water than equivalent hyaluronic formulations
• Light, silky finish suitable for layering under creams and makeup

What improvements can I expect in texture and fine lines?

By increasing surface moisture, the serum temporarily plumps very fine lines and refines skin texture, giving a softer, smoother look. Regular use supports a hydrated base that makes pores and crepey areas appear less noticeable, while also preparing skin for better makeup application.

• Instant smoothing effect on fine lines and rough patches
• Improved makeup canvas with reduced dry flakiness
• Consistent use helps maintain a more even skin surface

How do I incorporate this serum into my daily routine?

Apply to clean, damp skin after cleansing and any water-based serums, then follow with your moisturizer to seal hydration. Because it’s lightweight and non-comedogenic, it works in both morning and evening routines and layers well with sunscreens and makeup.

• Use a few drops on damp skin for maximum absorption
• Follow with a moisturizer or oil to lock in hydration
• Safe to pair with most active ingredients; patch-test if uncertain

Is this suitable for sensitive or acne-prone skin?

The INKEY List Polyglutamic Acid Serum is formulated to be gentle and hydrating without adding heaviness, which often benefits sensitive and acne-prone skin types. Because it acts mainly on the surface to retain moisture, it rarely contributes to breakouts, though individual reactions vary.

• Non-greasy texture reduces pore-clogging risk
• Hydrates without heavy oils or occlusive films
• Patch-test recommended for those with active irritation

Who is this for: This serum is ideal for anyone seeking a fast-absorbing hydrator that enhances surface moisture, smooths the look of fine lines, and improves skin texture and radiance. It’s especially useful for people with dry or combination skin wanting a lightweight base for makeup, and for those who use hyaluronic acid but want an option that emphasizes superior surface water retention. Suitable for daily use in both AM and PM routines; consult a dermatologist for complex skin concerns.