COS DE BAHA LS Lactic Acid 12.5 Serum – Korean AHA Exfoliating & Skin-Smoothing Care

• Product type: Lactic acid AHA exfoliating facial serum
• Size / volume: 30 ml / 1.0 fl. oz.
• Primary concerns: Dead skin buildup, rough or uneven-looking texture, dullness, uneven skin tone, visible pores, dark spots and visible fine lines
• Skin types: Suitable for all skin types according to current manufacturer guidance; sensitive or acid-naive skin should patch test and introduce gradually
• Key concentration: 12.5% lactic acid
• Key ingredients: 12.5% lactic acid, glycerin, aloe vera leaf extract, arginine, Damask rose extract, lavender flower extract, green tea extract, lemon balm extract and mugwort extract
• Texture: Clear, watery serum that absorbs quickly into the skin
• Finish: Fresh, smooth, refined and brighter-looking
• Usage: After evening cleansing and toning, apply an appropriate amount before moisturizer
• Frequency: Use 2–3 times per week in the evening according to current manufacturer directions
• Routine placement: Apply after cleansing and toner and before moisturizer; finish daytime skincare with broad-spectrum sunscreen
• Origin: Made in South Korea
• Storage: Keep tightly closed and store away from excessive heat and direct sunlight
• Caution: For external use only. Patch test before regular use. Avoid direct eye contact and discontinue use if persistent irritation occurs. Do not use on the same evening as retinoids or other strong exfoliating acids if doing so causes irritation, and use diligent daytime sun protection while using AHA skincare

Core Product Details

12.5% Lactic Acid for a Smoother, More Luminous Surface

COS DE BAHA LS Lactic Acid 12.5 Serum transforms chemical exfoliation into a refined South Korean skincare ritual dedicated to texture, clarity and visible radiance. Powered by 12.5% lactic acid, this AHA serum helps loosen accumulated dead surface cells that can make skin appear rough, dull or uneven. With thoughtful use, the complexion is invited toward a softer, smoother and more polished appearance, making this Korean lactic acid serum especially alluring for beauty lovers seeking gentle resurfacing without relying on abrasive physical exfoliation.

A Hydrating AHA with a Refined Exfoliating Touch

Lactic acid belongs to the alpha hydroxy acid family and is prized for its ability to exfoliate while maintaining a more moisture-conscious character than many traditional resurfacing treatments. COS DE BAHA positions its 12.5% concentration for skin texture improvement, exfoliation and pore care, helping reveal a fresher-looking surface beneath dull buildup. The result is not the harsh sensation of an aggressive peel, but a carefully measured evening ritual designed to encourage clarity, smoothness and renewed luminosity.

Brightness & Texture Refinement Without Physical Scrubs

As dead skin cells are lifted from the surface, uneven-looking texture can appear more refined and the complexion can take on a clearer, brighter finish. Lactic acid also makes LS Serum relevant to routines focused on dark spots, visible fine lines and lack of radiance. Used consistently rather than excessively, this Korean AHA exfoliating serum becomes a sophisticated alternative to grainy scrubs, allowing chemical exfoliation to reveal the smooth, light-reflective surface associated with a polished glass-skin ritual.

Hydration Softens the Experience of Resurfacing Care

The current manufacturer formula pairs lactic acid with glycerin and aloe vera, bringing a hydrating and conditioning dimension to exfoliation. Rather than leaving the ritual centered solely on resurfacing, these ingredients help support a more comfortable skin feel as the AHA works on surface buildup. This balance between exfoliation and moisture is part of what makes lactic acid especially appealing for those who desire renewed texture without abandoning softness and suppleness.

Botanical Extracts Complete the South Korean Formula

Damask rose, lavender, green tea, lemon balm and mugwort extracts complete the current formula with botanical skin-conditioning character. The composition reflects a distinctly modern K-Beauty sensibility: a high-performance exfoliating active balanced by hydration and carefully chosen supporting ingredients. Each evening application becomes less about stripping the complexion and more about refining it—encouraging skin that feels smoother and appears clearer, fresher and increasingly radiant.

An Evening Ritual Best Savoured Two to Three Times Weekly

COS DE BAHA currently recommends using LS Serum two to three evenings per week after cleansing and toning and before moisturizer. Its clear, watery texture absorbs quickly, allowing the treatment to slip easily into an established Korean skincare routine. Because AHAs can increase sun sensitivity, diligent daytime sunscreen is essential. Those also using retinoids or other potent exfoliants may prefer to alternate them on separate evenings to help minimize unnecessary irritation.

Where Gentle Resurfacing Reveals a More Captivating Glow

Made in South Korea, COS DE BAHA LS Lactic Acid 12.5 Serum turns exfoliation into an intimate ritual of renewal. A concentrated 12.5% lactic acid formula meets hydrating glycerin, aloe and botanical extracts in a treatment designed to uncover the luminosity that can become hidden beneath dull surface buildup. With each thoughtfully spaced application, skin is invited to feel softer, look smoother and reflect light with the fresh refinement that makes a beautifully cared-for complexion so irresistible.

FAQ

What does COS DE BAHA LS Lactic Acid 12.5 Serum do?

The serum uses 12.5% lactic acid to exfoliate dead surface cells and help improve the appearance of rough texture, dullness, uneven tone, visible pores, fine lines and dark spots while supporting a smoother, brighter-looking complexion.

How often should I use COS DE BAHA Lactic Acid 12.5 Serum?

COS DE BAHA's current directions recommend applying the serum two to three times per week in the evening rather than using it as unrestricted daily exfoliation.

Is COS DE BAHA LS Serum suitable for sensitive skin?

The manufacturer positions it for all skin types, but 12.5% lactic acid is still a concentrated exfoliating treatment. Sensitive or acid-naive skin should patch test first and introduce the serum gradually according to individual tolerance.

Can I use COS DE BAHA Lactic Acid Serum with retinol?

Because both retinoids and lactic acid can be potent, using them on separate evenings can help reduce the risk of excessive irritation. The supplier and retailer guidance specifically advises alternating the two rather than layering them in the same routine.

Do I need sunscreen while using COS DE BAHA LS Lactic Acid Serum?

Yes. AHAs such as lactic acid can increase sun sensitivity, so broad-spectrum sunscreen should be an essential part of your daytime skincare routine while using this exfoliating serum.

Reveal the Smoothness That Lets Your Radiance Take Over

Make COS DE BAHA LS Lactic Acid 12.5 Serum the elegant reset within your evening ritual. Concentrated Korean AHA exfoliation, moisture-conscious care and botanical refinement come together to reveal skin that looks smoother, brighter and exquisitely renewed—the kind of luminosity that feels less applied than uncovered.