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Rosemary AHA Night Serum

Rosemary AHA Night Serum

Product Description

Product overview

Made in Various INTERNATIONAL

A gentle yet effective overnight exfoliating serum featuring 9% Lactic Acid, 7% Rosemary Leaf Extract, and 0.5% Succinic Acid to refine pores, smooth skin texture, and reveal a radiant, glass-like complexion by morning.

100% Vegan Cruelty-Free Fragrance-Free Alcohol-Free Paraben-Free Silicone-Free
Pregnancy
Caution
Fungal Acne
Caution
Comedogenic
1/5
Size
30ml / 1.01 fl oz
Form
Liquid Serum
pH Level
3.5 - 4.0
Use Time
PM Only
Frequency
1-3x Weekly
Real reviews · YouTube Shorts
Why it's different

Gentle Exfoliation

9% Lactic Acid gently removes dead skin cells and refines texture without harsh irritation typical of glycolic acid.

01

Texture & feel

SENSORY
Consistency
Lightweight Fluid
Scent
Mild Herbal
Absorption
Fast (30 sec)
Finish
Slightly Tacky to Matte

Gentle Exfoliation

9% Lactic Acid gently removes dead skin cells and refines texture without harsh irritation typical of glycolic acid.

Soothing Antioxidants

7% Rosemary Leaf Extract provides anti-inflammatory and antibacterial benefits while calming irritated skin.

Blackhead Fighter

0.5% Succinic Acid targets blackheads and regulates sebum without the harshness of salicylic acid.

Triple Hyaluronic Complex

Three forms of Hyaluronic Acid maintain hydration while acids work, preventing the dryness common with AHA products.

02

Safety & compatibility

SAFE
Pregnancy & Breastfeeding

Contains 9% Lactic Acid. Most dermatologists recommend AHAs under 5% during pregnancy. Consult your doctor before use.

Fungal Acne (Malassezia)

Contains Hydrolyzed Malt Extract (fermented ingredient) which may feed Malassezia yeast in some individuals.

Comedogenic Rating: 1/5

Very low risk of clogging pores. Water-based formula with no heavy oils or known pore-clogging ingredients.

Sun Sensitivity

AHAs increase photosensitivity. Always use SPF 30+ sunscreen the morning after application.

03

Ingredient breakdown

INGREDIENTS

Lactic Acid 9%Proven

An alpha hydroxy acid (AHA) derived from milk fermentation. Gentler than glycolic acid with larger molecular size, making it ideal for sensitive skin while still delivering effective exfoliation.

  • Function: Exfoliates dead skin cells, promotes cell turnover, improves texture
  • Benefit: Also acts as a humectant, helping skin retain moisture
  • Research: Proven to stimulate ceramide production and strengthen skin barrier
Start with once weekly application and gradually increase to 2-3 times per week as skin builds tolerance.

Rosmarinus Officinalis (Rosemary) Leaf Extract 7%Proven

A powerful botanical extract rich in rosmarinic acid, carnosic acid, and other antioxidants. Provides soothing and antimicrobial benefits.

  • Function: Antioxidant, anti-inflammatory, antimicrobial
  • Benefit: Calms irritation from acid exfoliation, fights acne-causing bacteria
  • Research: Rosmarinic acid shown to reduce inflammation and protect against oxidative stress
Natural rosemary scent comes from this extract - no added fragrance in the formula.

Succinic Acid 0.5%Promising

Naturally derived from amber, this gentle acid provides BHA-like benefits for blackhead-prone skin without the potential irritation of salicylic acid.

  • Function: Anti-inflammatory, antimicrobial, sebum-regulating
  • Benefit: Targets blackheads and reduces pore size without drying skin
  • Research: Emerging studies show effectiveness against C. acnes bacteria

Hyaluronic Acid Complex Multi-weightProven

Three forms of hyaluronic acid (Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate) provide multi-level hydration.

  • Function: Humectant that attracts and retains moisture
  • Benefit: Counteracts potential dryness from AHA exfoliation
  • Research: Can hold up to 1000x its weight in water

25 ingredients

Water, Lactic Acid, Dipropylene Glycol, Glycerin, Butylene Glycol, Methylpropanediol, Sodium Hydroxide, 1,2-Hexanediol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Hydroxyethylcellulose, Succinic Acid, Propanediol, Ethylhexylglycerin, Melia Azadirachta Leaf Extract, Hydrolyzed Gardenia Florida Extract, Hydrolyzed Malt Extract, Hydrolyzed Viola Tricolor Extract, Glyceryl Acrylate/Acrylic Acid Copolymer, Melia Azadirachta Flower Extract, Allantoin, Betaine, Panthenol, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate

FREE FROM: Artificial Fragrance, Alcohol, Parabens, Silicones, Sulfates, Mineral Oil, Animal-derived Ingredients, Synthetic Dyes, Phthalates, PEGs
04

Where it fits in your routine

ROUTINE
1
Oil Cleanser
2
Water Cleanser
3
AHA Serum
4
Hydrating Toner
5
Moisturizer
6
SPF (AM)

Apply to dry, cleansed skin in the PM only. Shake well before use. Follow with hydrating products and always use sunscreen the next morning.

05

How to use

HOW TO USE
1

Cleanse & Dry

Wash your face with a gentle cleanser in the evening. Pat skin completely dry - applying to wet skin can increase irritation.

2

Shake & Dispense

Shake the bottle well to ensure ingredients are properly mixed. Dispense 3-4 drops onto fingertips or palm.

3

Apply Evenly

Gently spread across face, avoiding eye area and lips. Do not layer with other actives (retinol, vitamin C, other acids).

4

Build Tolerance

Start with once weekly, gradually increasing to 2-3 times per week. Cleanse with a gentle cleanser the following morning.

06

Who is it for?

WHO

Perfect for you if:

  • You want smoother, more refined skin texture
  • You struggle with enlarged pores and blackheads
  • You prefer gentler exfoliation over harsh scrubs
  • You want to improve dull, uneven skin tone
  • You're looking for a vegan K-beauty acid treatment
  • You want an AHA that doesn't strip moisture

Consider alternatives if:

  • You're pregnant or breastfeeding (consult doctor first)
  • You have very sensitive or compromised skin barrier
  • You're already using strong retinoids or other acids
  • You have active eczema, psoriasis, or open wounds
  • You need a completely fungal acne-safe formula
  • You want daily-use exfoliation (this is 1-3x weekly)
07

Skin type compatibility

SKIN TYPES
Oily Skin
Excellent

Lightweight formula controls excess sebum. Succinic acid helps regulate oil production without over-drying.

Dry Skin
Good

Lactic acid provides hydration while exfoliating. Follow with a rich moisturizer to prevent any tightness.

Combination Skin
Excellent

Balances well across different face zones. Refines T-zone pores while keeping cheeks hydrated.

Sensitive Skin
Moderate

Rosemary soothes, but 9% lactic acid may be strong. Start once weekly and patch test first.

Acne-Prone Skin
Excellent

Non-comedogenic formula. AHA unclogs pores while succinic acid fights bacteria without irritation.

08

Results timeline

WEEK 12+
Week 1-2

Initial Adjustment

Skin may feel slightly tingly during application. Some users notice immediate smoothness the morning after. Minor purging possible if pores were congested.

65% noticed smoother texture
Week 3-4

Visible Texture Improvement

Skin texture becomes noticeably refined. Makeup applies more smoothly. Pores appear smaller and blackheads start clearing.

78% saw pore improvement
Week 6-8

Radiant Complexion

Skin tone becomes more even. The "glass skin" effect becomes apparent. Overall brighter, more radiant appearance.

85% reported brighter skin
Week 12+

Long-term Benefits

Sustained improvement in skin texture and clarity. Fine lines may appear softer. Skin barrier remains healthy with proper moisturization.

82% would repurchase
09

Ratings by platform

750+ REVIEWS
Amazon
4.3
Rating
200+
Reviews
Main complaint: Small bottle size for the price; some find it slightly drying without moisturizer
YesStyle
4.7
Rating
150+
Reviews
Main complaint: Rosemary scent too strong for some; needs more product per application
Brand Website
4.8
Rating
100+
Reviews
Main complaint: Wished for larger size option; tacky texture takes time to absorb
Olive Young
4.5
Rating
300+
Reviews
Main complaint: Initial purging period; may be too strong for sensitive skin types
10

Pros & cons

BALANCED

Praised

  • Noticeably smoother skin texture within weeks
  • Effective pore refinement and blackhead reduction
  • Gentle enough for most skin types when used properly
  • 100% vegan and cruelty-free formula
  • Contains soothing rosemary to offset acid irritation
  • Triple hyaluronic acid prevents excessive dryness
  • Clean ingredient list with no common irritants
  • Glass skin effect with consistent use

Criticized

  • Small 30ml bottle size for the price point
  • Rosemary scent may be off-putting for some
  • Can feel tacky before fully absorbing
  • 9% concentration may be too strong for beginners
  • Not suitable for daily use (1-3x weekly only)
  • Requires sunscreen commitment the next day
  • May cause initial purging in congested skin
  • Not completely fungal acne safe
11

Budget-friendly alternatives (dupes)

DUPES
85% Match
Lactic Acid 10% + HA
$6.80
Budget Pick

Higher lactic acid concentration (10% vs 9%) at a fraction of the price. Lacks the rosemary and succinic acid but includes Tasmanian Pepperberry for soothing. Best budget alternative for basic AHA exfoliation.

70% Match
AHA 7 Whitehead Power Liquid
$25.00
Similar Price

Uses 7% Glycolic Acid instead of Lactic Acid - more potent but potentially more irritating. Larger 100ml size offers better value. Different acid profile targets similar concerns.

65% Match
Skin Perfecting 8% AHA Gel Exfoliant
$35.00

Western pharmacy-grade formula with glycolic acid. More research-backed but pricier. No botanical soothing agents. Better for those preferring fragrance-free, no-frills formulas.

12

Comparison with competitors

SIDE-BY-SIDE
Lactic Acid 10% + HA
Key Acid 10% Lactic Acid
Size 30ml
Bonus Actives Tasmanian Pepperberry only
Vegan Yes
Best For Budget-conscious, Basic Exfoliation
AHA 7 Whitehead Power Liquid
Key Acid 7% Glycolic Acid
Size 100ml
Bonus Actives Niacinamide, Apple Water
Vegan Yes
Best For Whiteheads, Value Size
Skin Perfecting 8% AHA Gel Exfoliant
Key Acid 8% Glycolic Acid
Size 100ml
Bonus Actives Chamomile, Green Tea
Vegan Yes
Best For Anti-aging, Research-backed
13

Storage & shelf life

12 MONTHS
Period After Opening (PAO)

12 months after opening

Storage

Store in a cool, dry place away from direct sunlight. No refrigeration required but can extend freshness.

Packaging

Frosted glass dropper bottle - protects formula from light degradation

Travel Friendly

Yes - 30ml is under 100ml TSA limit for carry-on liquids

13

Frequently asked questions

FAQ

Use with caution. This serum contains 9% Lactic Acid, which is higher than the typically recommended 5% or lower concentration for pregnancy. While lactic acid is generally considered one of the safer AHAs during pregnancy, the higher concentration warrants consulting your OB-GYN or dermatologist before use. Many healthcare providers recommend avoiding or limiting AHA use during pregnancy and breastfeeding.

Not completely. While lactic acid itself is fungal acne safe, this formula contains Hydrolyzed Malt Extract, which is a fermented ingredient that may potentially feed Malassezia yeast. If you're prone to fungal acne, you may want to patch test first or consider alternatives like The Ordinary Lactic Acid which has a simpler formula without fermented ingredients.

Not in the same routine. Avoid layering this serum with retinol, vitamin C, or other AHA/BHA products as this can cause over-exfoliation and irritation. If you want to use multiple actives, alternate nights - for example, use this serum on Monday/Wednesday and retinol on Tuesday/Thursday. Always allow your skin barrier to recover between active treatments.

This serum works best for oily, combination, and acne-prone skin types looking to refine pores and improve texture. It's also suitable for dry skin (lactic acid is hydrating) when followed by moisturizer. Those with very sensitive or reactive skin should start slowly with once-weekly application. Not recommended for severely compromised skin barriers.

Most users notice smoother skin texture within 1-2 weeks of consistent use. Visible pore refinement typically occurs around weeks 3-4. The full "glass skin" effect and significant improvement in skin clarity usually develops after 6-8 weeks of regular use (2-3 times weekly). Results vary based on skin type and concerns.

Apply this serum to clean, dry skin after cleansing in your PM routine only. It should be applied before hydrating toners, essences, and moisturizers. Do not use with other active treatments on the same night. Always follow with sunscreen SPF 30+ the next morning, as AHAs increase photosensitivity.

No, this serum has a very low comedogenic rating of 1/5. The water-based formula contains no heavy oils or known pore-clogging ingredients. In fact, the AHA and succinic acid actively help unclog pores by exfoliating dead skin cells and targeting blackheads. It's designed to be non-comedogenic and suitable for acne-prone skin.

The serum has a PAO (Period After Opening) of 12 months. Once opened, use within one year for optimal efficacy. The frosted glass dropper bottle helps protect the formula from light degradation. Store in a cool, dry place away from direct sunlight. If the product changes color, smell, or texture, discontinue use.

— Skincarisma verdict
4.3 / 5 ★★★★☆

Verdict: KAINE Rosemary AHA Night Serum is an impressive K-beauty exfoliant that combines effective 9% Lactic Acid with soothing botanical extracts for a balanced approach to chemical exfoliation. The addition of 7% Rosemary Extract and 0.5% Succinic Acid sets it apart from basic AHA serums, offering anti-inflammatory benefits and gentle blackhead-fighting power. While the 30ml size feels modest for the price, the thoughtful formulation with triple hyaluronic acid makes it gentler than many competitors. Ideal for those seeking smoother, more refined skin without the harshness of glycolic acid. Just be mindful of the pregnancy caution and potential fungal acne concerns from the malt extract.

Product Overview

question
lightbulb What are Quick Product Notes?

Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.

muscle Pro Tip Alert!

Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.

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Quick Product Notes

Click on icons for more information
question
lightbulb What are Notable Effects & Ingredients?

Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.

We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.

muscle Pro Tip Alert!

Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.

Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you

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Notable Effects & Ingredients

anti-aging Anti-Aging from 3 ingredient(s):
Lactic Acid Hyaluronic Acid Hydrolyzed Hyaluronic Acid
brightening Brightening from 4 ingredient(s):
Lactic Acid Glycerin Hyaluronic Acid Hydrolyzed Hyaluronic Acid
wound Promotes Wound Healing from 6 ingredient(s):
Glycerin Allantoin Panthenol Hyaluronic Acid Hydrolyzed Hyaluronic Acid Sodium Hyaluronate
question
lightbulb What are Ingredients Related to Skin Type?

Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.

We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.

muscle Pro Tip Alert!

A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.

One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!

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Ingredients Related to Skin Types

Click on icons for more information
dry-skin Dry Skin
4
oily-skin Oily/Acne-Prone Skin
1
sensitive-skin Sensitive Skin
1
question
lightbulb What is the Ingredient Safety Breakdown?

Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.

muscle Pro Tip Alert!

EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.

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Ingredient Safety Breakdown

EWG Health Ratings
Low risk
Medium risk
High risk
Unknown risk
64% 4% 32%

Product ingredient list

Showing first 5 of 25 ingredients
EWG CIR Ingredient Name & Cosmetic Functions Notes
1 Unknown
Water
Solvent, Skin Conditioning
0 Unknown
Lactic Acid
brightening Brightening
anti-aging Anti-Aging
1 A
Dipropylene Glycol
Fragrance, Solvent, Viscosity Decreasing Agent, Masking, Viscosity Controlling
2 A
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
brightening Brightening
Promotes Wound Healing
Hydrating
1 A
Butylene Glycol
Solvent, Skin Conditioning, Masking, Fragrance, Humectant, Viscosity Controlling, Viscositydecreasing Agent
Hydrating
VIEW ALL INGREDIENTS