Cos de Baha Aha
Shop Cos De BAHA AHA exfoliating care in a focused 2-product live edit: GS AHA 7% BHA 0.5% Peeling Skin 200ml and Glycolic Acid AHA 10% Serum 30ml. This collection is for shoppers comparing leave-on acid formats, strength, routine placement, and cautious exfoliation in a Korean facial-care routine.
By Skinsli editorial Updated
Buying guide
How to choose Cos De BAHA AHA exfoliants
Cos De BAHA AHA is a small, focused collection with 2 live exfoliating products: GS AHA AHA 7% BAJA BHA 0.5% Peeling Skin 200ml and Glycolic Acid AHA 10% Serum 30ml. Choose between them by format, acid strength, and how much exfoliation your routine can tolerate.
What this AHA page covers
This is not a broad Cos De BAHA page. It is specifically for AHA exfoliation, with one 200ml peeling skin that also names BHA 0.5%, and one 30ml glycolic acid AHA serum.
Because there are only 2 live products, the choice is direct: toner-like peeling skin versus serum format. Both should be introduced carefully.
Peeling skin vs serum
GS AHA 7% BHA 0.5% Peeling Skin 200ml is the larger liquid format and may suit shoppers who like toner-style acid steps. Glycolic Acid AHA 10% Serum 30ml is a smaller serum format with a clear glycolic acid focus.
If you prefer applying acids with a cotton pad or as an early liquid step, the peeling skin may feel more familiar. If you prefer a measured treatment layer, the serum format may be easier to control.
Strength and frequency
The visible names include AHA 7%, BHA 0.5%, and AHA 10%, so these are not products to add casually twice a day. Start low in frequency, such as once or twice a week, then adjust only if your skin stays comfortable.
Do not use both products in the same routine when you are starting. Pick one AHA step so you can judge sensitivity, dryness, or stinging without confusion.
Where AHA fits in a routine
Use AHA after cleansing and before heavier hydrating or moisturizing steps, unless the product directions say otherwise. Follow with a gentle moisturizer to reduce the chance of dryness.
Many shoppers prefer acids at night because they are easier to separate from morning sunscreen and makeup. If you use AHA in the morning, sunscreen is essential.
What to avoid layering
Avoid stacking Cos De BAHA AHA products with other strong exfoliants, retinoids, peeling pads, or harsh scrubs in the same routine until you know your tolerance. Over-exfoliation can make skin feel tight, shiny, or irritated.
Keep the rest of the routine plain on acid nights: cleanser, AHA, moisturizer. Add soothing or barrier-supporting products on non-acid days if your skin needs recovery.
Who should be cautious
Very sensitive, freshly shaved, compromised, or irritated skin should approach AHA slowly. Patch test first and pause if the product causes uncomfortable burning or visible irritation.
If you are under dermatology care or using prescription actives, ask your clinician how to fit glycolic acid or mixed AHA and BHA products into your routine.
FAQ
Frequently asked questions
FAQ
Frequently asked questions
Which Cos De BAHA AHA products are live here?
The live collection has 2 products: GS AHA AHA 7% BAJA BHA 0.5% Peeling Skin 200ml and Glycolic Acid AHA 10% Serum 30ml.
Should I choose Cos De BAHA AHA 7% peeling skin or AHA 10% serum?
Choose the 7% peeling skin if you prefer a larger toner-like liquid that also names BHA 0.5%. Choose the 10% glycolic serum if you want a smaller, more focused serum format. Start slowly with either one.
Can I use both Cos De BAHA AHA products together?
Do not start by using both in the same routine. Pick one AHA product, use it sparingly, and only consider alternating later if your skin tolerates acids well.
How often should I use Cos De BAHA AHA?
Start once or twice a week, then adjust based on comfort. Reduce frequency if your skin feels tight, dry, shiny, or irritated.
Do I need sunscreen when using Cos De BAHA AHA?
Yes. AHA exfoliation can make sunscreen discipline more important. Use broad-spectrum sunscreen every morning, especially when acids are part of your routine.
Can sensitive skin use Cos De BAHA AHA?
Sensitive skin should patch test and introduce AHA very slowly. Avoid using it on irritated, compromised, or freshly shaved skin.