COSRX The Blue Peptide Bakuchiol Plump Glow Serum 50ml

Blue Peptide meets Bakuchiol for plump, radiant skin

When skin starts to lose firmness and pores become more visible, this serum helps restore density and bounce. Formulated with Blue Peptide and bakuchiol—often called plant-based retinol—it targets elasticity and radiance at the same time. The rich, non-dripping texture adheres seamlessly to skin and absorbs quickly. It's a dual-functional cosmetic certified for both wrinkle improvement and brightening.

17 clinical parameters confirm visible results

Multiple skin improvement markers were validated through human application tests.

• Collagen increase +153.42% (in vitro)
• Instant hydration boost +215.25%
• Pore area -30.47%, pore depth -15.38%
• Triangle zone radiance +33~35%
• Flakiness improvement -93.77%
• Makeup adherence +63.08%, evenness +103.54%

Dermatologist-tested on sensitive skin with an irritation score of 0.00, making it safe for even reactive complexions.

A densely layered formula built around firming actives

Five multi-peptides, collagen, and adenosine (wrinkle-improving) work to support elasticity, while hyaluronic acid (moisturizing) and betaine deliver deep hydration. Niacinamide 2% (tone-evening) and inositol help balance sebum, and beta-glucan plus panthenol soothe and strengthen the skin barrier. Ideal for those noticing enlarged pores or loss of firmness, or anyone who feels their skin has lost volume after weight loss. Note: Do not layer with vitamin C serum at the same time—alternate between morning and evening use.

Use at the essence or serum step

After cleansing and toning to prep your skin, apply this serum during your hydrating essence or serum step. Follow with a moisturizer to help lock in the active ingredients and ensure seamless adherence. For enhanced firming benefits, pair it with the bakuchiol cream from the same line.

Safe for morning and evening use, but separate from vitamin C

Unlike retinol, bakuchiol is not photosensitive, so you can use it both morning and night. However, if you're also using a vitamin C serum, layering high-concentration formulas at the same time may cause irritation. We recommend using vitamin C in the morning and this serum in the evening.

Apply 2–3 drops and gently smooth over the entire face

Dispense 2–3 drops with the dropper and dot onto your forehead, both cheeks, nose, and chin. Gently smooth outward from the center of your face. The serum has a bouncy, gel-like texture that stays put without sliding off. For areas where pores are a concern, lightly pat the serum in to help absorption.

Recommended combinations by skin concern

• Firming and pore care: Start with the peptide skin booster, follow with this serum, and finish with the bakuchiol cream
• Tone-evening and dark spot care: Use vitamin C serum in the morning and this serum in the evening to separate application times
• Hydration boost: Layer this serum over a hyaluronic acid toner to help target dehydration from within

Usage notes

This gentle formula has been tested on sensitive skin, but if it's your first time using it, patch-test with a small amount before full application. It contains 2% niacinamide and is compatible with most ingredients, but avoid using it at the same time as high-concentration vitamin C products. After opening, store in a cool place away from direct sunlight. If redness or irritation occurs during use, discontinue immediately.

Product ingredients list.

The list of ingredients is subject to change. Please consult the packaging of the product purchased.