Name: Overnight Biological Peel
Brand: Kiehl's
Rating: 2.92 (12 reviews)

Rich and earthy shades like mustard yellow, olive green, and chocolate brown look great on you

How to Write a TikTok Review
 Help us keep the Hwahae community trustworthy by following these guidelines: 
Reviews that violate these may be removed without notice.

Bright and fresh shades like coral, warm pinks, and fresh greens look great on you

Soft and muted shades like pastel blues, dusty pinks, and soft lavenders look great on you

High-contrast and bold shades like pure white, black, icy blues, and deep reds look great on you

I confirm this is my own TikTok video and agree it maybe featured on Hwahae.
 Any misuse may result in removal or restrictions.
 For details, tap the

Our service will be temporarily unavailable during:

Scheduled Maintenance

This is a Health Functional Food certified by the Ministry of Food and Drug Safety (MFDS) of Korea, designed to help maintain and improve your health.

This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions.

Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.

Each ingredient is selected for its specific purpose, such as improving skin hydration or brightening. However, the inclusion of these ingredients does not guarantee the overall effectiveness of the final product. Simply using these ingredients does not ensure the product will deliver the claimed benefits.

AI-Analyzed Reviews are coming soon!
We're gathering more reviews to provide you with the best insights.

Be the first to share your experience!
Used this product?
Share your TikTok review to help others discover it.

The content is currently being reviewed by the Hwahae operations team, and the verification will be completed by the next business day (excluding weekends and holidays) from the date the review was written.

키엘

Overnight Biological Peel

Leaves a Sticky Residue

Overpowering Smell

May Cause Eye Irritation

Feels Harsh on Skin

Unsatisfactory Scent

Irritating

Smooth

Improves Skin Texture

Improves Complexion

Lasts Long

Improves Skin Tone

Exfoliates Well

Softens

The ingredients are really bad 😢 There wasn't much of an effect, but the ingredients are just terrible 😭

It doesn't seem to be a product that has any particular effect. I'm not sure about the exfoliation.

오버나이트 바이오로지컬 필

Many people seem to dislike stickiness or residue, but I've also tried other Baha peeling masks from different brands and they were similar. 
So I don't think this product's stickiness is a particular weakness.
You can just put a towel on your pillow when you sleep ㅎㅎ

This is definitely less irritating than the Ahana Baha peeling product. The peeling effect seems to be relatively weaker than Ahana Baha, but my skin feels smoother without drying out after the peeling. 
After experiencing that softness in the morning after using it, I find myself wanting to use it every day. I'm addicted!! But they say to only use it 2-3 times a week ㅜㅜ ㅎㅎ

The unique scent is somewhat similar to the perm smell..or like ammonia?
Personally, I often felt unwell when using it, so I couldn't use it frequently.
It seems like the scent lingers while I'm applying it.
While applying it, the sticky feeling bothered me as it would transfer to my pillow.
So I was reluctant to use it, and eventually I discarded it without even using it 10 times.

In the evening, I felt a smooth sensation after applying it and sleeping.

Apply it after taking a warm bath.
Be sure to apply sunscreen the next day after using it.

I didn't really feel a significant downside. 😢 Since it's not a daily product, it doesn't feel overly expensive either.

This is one of my favorite products, but when I checked the Hwahae app, I saw that it contains a lot of bad ingredients. 😢 However, since I only use it two to three times a week and not daily, I think it's okay. If you use it consistently, you don't need to exfoliate separately, and your makeup applies well the next day, and your skin looks brighter too~ I've already purchased four bottles and have been using them. Just apply it and leave it on, and you'll see the effects of excellent exfoliation and a great mask pack. ^^

The scent is quite strong, almost like bleach, so I was worried the ingredients might be too harsh. I ended up not using it much even after buying it. I made sure to apply sunscreen whenever I went out, just in case.

My skin is incredibly smooth and radiant after using this product. The wash-off formula is really convenient when I'm in a hurry, though...

 Absolutely do not use it. Just because it's expensive doesn't mean it's good.

 It's a complete no-go.
I occasionally use it because it's a waste, but when I checked the ingredients today, I almost fainted.

 My acquaintance said that their skin improved after using it, so I purchased it at the airport. However, the smell is exactly like the old perm solution, and it stings and feels sticky...

 It stings every time I apply it. 
The price is expensive and the application feels unpleasant.

 At first, it felt irritating and unpleasant to apply, but I feel like my complexion is becoming clearer.

 It's a bit too expensive though.
Just use another exfoliating product instead.

 Using urea ingredients, it feels gentler on the skin compared to AHA or BHA. 
When applied in the evening and left overnight, you can wake up to a smooth, soft skin like a peeled hard-boiled egg the next day.

But looking at it here, there seem to be a lot of bad ingredients, especially parabens....????ㅠㅠ What's going on?ㅠㅠ

When I apply this and sleep, I feel like my skin is noticeably different the next morning. It's so bright and smooth, and my makeup applies really well too.

For sensitive skin, it may feel a bit stinging, but I liked it.

It lasts a long time. When you use it, you may not notice, but after using it, your makeup applies well.

Kiehl's Overnight Biological Peel Reviews

1 Reviews