Skip to content

Mandelic Acid Serum

Mandelic Acid Serum

Product Description

Good Molecules Mandelic Acid Serum

A gentle yet effective exfoliating serum combining 10% Mandelic Acid with PHAs and Hyaluronic Acid to resurface, brighten, and hydrate sensitive skin without irritation.

✔ Pregnancy Safe ✔ Fungal Acne Safe ✔ Fragrance-Free ✔ Vegan & Cruelty-Free ✔ Oil-Free 🇺🇸 Made in USA

⚡ Quick Info

🇺🇸
Origin
US Brand
🤰
Pregnancy
Yes ✔
🍄
FA Safe
Yes ✔
🔬
Comedogenic
0 (None)
📊
pH Level
4.0
📦
Size
30ml / 1oz

✨ Key Benefits

🧴

Gentle Exfoliation

10% Mandelic Acid exfoliates slowly and evenly due to its larger molecular size, minimizing irritation while effectively resurfacing skin.

💧

Deep Hydration

Two sizes of Hyaluronic Acid provide immediate and long-lasting hydration, leaving skin plump and moisturized.

🌟

Brightening Power

Phytic Acid and Gluconolactone (PHA) boost brightening effects while providing antioxidant protection.

🌸

Sensitive Skin Friendly

Formulated specifically for sensitive skin with allantoin to soothe and protect. No fragrance, oils, or harsh alcohols.

🧪 Texture & Feel

💎
Consistency
Lightweight Serum
👃
Scent
Fragrance-Free
⏱️
Absorption
30 Seconds
Finish
Hydrated, Silky

🔬 Key Ingredients Analysis

🍋 Mandelic Acid 10% Proven

An alpha hydroxy acid (AHA) derived from bitter almonds. Its larger molecular size (152.1 daltons vs glycolic acid's 76 daltons) means slower, more even penetration with significantly less irritation.

  • Mechanism: Exfoliates dead skin cells by breaking intercellular bonds, promoting cell turnover
  • Studies: Clinical research shows effectiveness in treating acne, hyperpigmentation, and photoaging with fewer side effects than glycolic acid
  • Benefits: Antibacterial and antioxidant properties make it excellent for acne-prone skin

🌾 Phytic Acid 1% Promising

A gentle AHA derived from rice bran that provides mild exfoliation while acting as an antioxidant and chelating agent.

  • Function: Mild exfoliation with skin-brightening and antioxidant benefits
  • Chelating Action: Helps stabilize formulation by preventing metal ions from binding

💧 Gluconolactone 1% Proven

A polyhydroxy acid (PHA) that provides gentle exfoliation with added humectant properties. Even gentler than AHAs, making it ideal for sensitive skin.

  • Hydrating Exfoliation: Exfoliates while attracting moisture to the skin
  • Antioxidant: Provides protection against free radical damage

💦 Sodium Hyaluronate 2 Sizes Proven

The sodium salt form of Hyaluronic Acid, a powerful humectant that can hold up to 1000x its weight in water. Two molecular weights provide both surface and deeper hydration.

  • Mechanism: Binds water to skin, improving hydration and plumpness
  • Multi-Weight Formula: Different sizes penetrate to different skin layers for comprehensive hydration

🌿 Allantoin Supporting Proven

A soothing ingredient with protective and moisturizing properties. Often added to products with active ingredients to minimize potential irritation.

  • Soothing: Calms and protects skin during active exfoliation
  • Wound Healing: Studies show it can promote skin healing at higher concentrations

📋 Full Ingredients List (17 Total)

Water, Mandelic Acid, Dimethyl Isosorbide, Propanediol, Potassium Hydroxide, Phytic Acid, Gluconolactone, Sodium Hyaluronate, Polyacrylate Crosspolymer-6, Allantoin, Caprylyl Glyceryl Ether, Sclerotium Gum, Sodium Polyacryloyldimethyl Taurate, Succinoglycan, Caprylhydroxamic Acid, Xanthan Gum, Glycerin

🚫 FREE FROM

❌ Fragrance ❌ Parabens ❌ Silicones ❌ Oils ❌ Sulfates ❌ Harsh Alcohols ❌ Common Allergens

🛡️ Safety Information

Pregnancy & Breastfeeding Safe

Mandelic acid is generally considered safe during pregnancy due to its larger molecular size and gentler penetration. Unlike retinoids and high-concentration salicylic acid, mandelic acid does not penetrate deep enough to cause systemic concerns. Always consult your healthcare provider.

Fungal Acne (Malassezia) Safe

This formula is confirmed fungal acne safe. Contains no fermented ingredients, problematic fatty acids, esters, or polysorbates that feed Malassezia yeast. The oil-free, minimal formula makes it ideal for those with fungal acne.

Non-Comedogenic (Rating: 0)

This oil-free, silicone-free formula contains no pore-clogging ingredients. Suitable for acne-prone skin and those concerned about congestion.

⚠️
Sun Sensitivity

AHAs increase photosensitivity. Always use SPF 30+ sunscreen during the day when using this product. Limit sun exposure and avoid tanning beds.

ℹ️
Patch Test Recommended

Although formulated for sensitive skin, individual reactions vary. Apply a small amount to your inner arm and wait 24 hours before full application.

📋 Where It Goes In Your Routine

1
Cleanser
2
Toner
3
This Serum
4
Hydrating Serum
5
Moisturizer
6
SPF (AM)

📝 How to Use

1

Cleanse Your Skin

Start with clean, dry skin. Use a gentle cleanser and pat dry completely before application.

2

Apply a Few Drops

Dispense 3-4 drops onto fingertips. Gently pat or massage onto face, avoiding the eye area.

3

Wait 30 Seconds

Allow the serum to absorb fully before applying other products. The lightweight formula absorbs quickly.

4

Follow with Moisturizer

Apply your favorite moisturizer to seal in hydration. In the morning, always finish with SPF 30+.

⚠️
Usage Frequency: Use up to 4x weekly at night. Start slowly (2x weekly) and increase as tolerated. Discontinue if irritation occurs. Do not use with other strong actives (retinol, other AHAs/BHAs, vitamin C) in the same routine.

👤 Skin Type Compatibility

Sensitive Skin ★★★★★ Excellent

Specifically formulated for sensitive skin. Mandelic acid's larger molecular size ensures gentle exfoliation without irritation.

Oily Skin ★★★★★ Excellent

Oil-free, lightweight formula absorbs quickly without adding shine. Helps regulate sebum and refine pores.

Combination Skin ★★★★★ Excellent

Balances well across different face zones. Hydrating enough for dry areas, non-greasy for oily zones.

Dry Skin ★★★★☆ Good

Hyaluronic acid provides hydration, but may need a richer moisturizer on top for very dry skin types.

Acne-Prone Skin ★★★★★ Excellent

Non-comedogenic, fungal acne safe, and antibacterial. Helps clear breakouts and fade post-acne marks.

Mature Skin ★★★★☆ Good

Promotes cell turnover and helps reduce fine lines. May want to combine with other anti-aging actives on alternate days.

📈 Expected Results Timeline

Week 1-2

Immediate Hydration & Smoothness

Skin feels more hydrated and silky. Some may notice slight initial sensitivity as skin adjusts to exfoliation.

85% noticed improved hydration
Week 2-4

Improved Texture & Clarity

Skin texture becomes smoother. Reduced roughness and dry patches. Early improvement in skin clarity and brightness.

78% noticed smoother texture
Week 4-6

Visible Brightening

Noticeable improvement in skin tone and radiance. Dark spots and post-acne marks begin to fade. Pores appear refined.

72% noticed brighter skin
Week 6-12

Significant Improvement

Substantial reduction in hyperpigmentation and uneven tone. Fine lines appear softened. Skin looks clearer and more even.

68% noticed reduced dark spots
ℹ️
Results vary based on individual skin type, concerns, and consistency of use. For best results, use consistently and always pair with daily SPF.

⭐ Reviews Across Platforms

🛒 Amazon
★★★★ 4.5
Rating
115+
Reviews
⚠️ Main feedback: Some wish for larger size options at this price point
💅 Ulta Beauty
★★★★ 4.4
Rating
85+
Reviews
⚠️ Main feedback: New product, still building review base
🏠 Brand Website
★★★★ 4.4
Rating
87+
Reviews
⚠️ Main feedback: Some experienced mild tingling initially
📱 SkinSort
★★★★ 3.8
Rating
472
Routines
⚠️ Top-rated fungal acne safe mandelic acid treatment

💬 What Users Love

👍

Gentle Yet Effective

"Finally an exfoliating acid that doesn't make my sensitive skin red and irritated!"

👍

Cleared Skin Texture

"My skin has never been smoother. Improved texture and refined pores within weeks."

👍

Affordable Quality

"Amazing value for a well-formulated product. Performs like high-end serums at a fraction of the cost."

💰 Budget Alternatives & Dupes

90% Match
The Ordinary Mandelic Acid 10% + HA
$9.90 Budget Pick

Same mandelic acid concentration. Contains Tasmanian Pepperberry instead of PHAs. More oily texture. Contains Polysorbate 20 (not FA-safe).

70% Match
INKEY List Mandelic Acid Treatment
$10.00 Similar Price

10% Mandelic + 0.1% Retinol (NOT pregnancy safe). Creamy texture designed as spot treatment. Smaller size (15ml). Contains oils (not FA-safe).

65% Match
Paula's Choice 6% Mandelic + 2% Lactic Acid
$37.00 Premium

Lower mandelic concentration (6%) combined with lactic acid. Contains fermented extracts (not FA-safe). Liquid exfoliant format. Larger size (88ml).

📊 Detailed Comparison

The Ordinary

$9.90
Mandelic Acid 10%
Additional Actives Tasmanian Pepperberry
Pregnancy Safe Yes ✔
Fungal Acne Safe No ✗
Size 30ml
Price/ml $0.33/ml

INKEY List

$10.00
Mandelic Acid 10%
Additional Actives 0.1% Retinol
Pregnancy Safe No ✗
Fungal Acne Safe No ✗
Size 15ml
Price/ml $0.67/ml

Paula's Choice

$37.00
Mandelic Acid 6%
Additional Actives 2% Lactic Acid
Pregnancy Safe Yes ✔
Fungal Acne Safe No ✗
Size 88ml
Price/ml $0.42/ml

📦 Product Details

📏
Total Ingredients
17
PAO (Shelf Life)
12 Months
🌡️
Storage
Cool, Dark Place
📦
Packaging
Dropper Bottle
✈️
Travel Friendly
Yes, Under 100ml
🐰
Cruelty-Free
Yes ✔

❓ Frequently Asked Questions

Yes, mandelic acid is generally considered safe during pregnancy and breastfeeding. Unlike retinoids or high-concentration salicylic acid, mandelic acid has a larger molecular size that prevents deep systemic penetration. This formula contains no retinoids or other pregnancy-unsafe ingredients. However, always consult with your healthcare provider before starting any new skincare product during pregnancy or breastfeeding.

Yes, this product is confirmed fungal acne safe. It contains no fermented ingredients, fatty acids (C11-C24), esters, polysorbates, or oils that feed Malassezia yeast. The minimal, oil-free formula makes it one of the best mandelic acid options for those with fungal acne. It's ranked as a top fungal acne safe treatment on SkinSort.

It's best to avoid layering this serum with other strong actives (retinol, vitamin C, other AHAs, BHAs) in the same routine to prevent irritation. You can alternate them on different nights: use mandelic acid one night, retinol the next. If you want to use vitamin C, apply it in the morning routine while using this serum at night. Start slowly and monitor your skin's tolerance.

This serum is specifically formulated for sensitive skin but works well for all skin types. It's particularly excellent for: sensitive skin (gentlest AHA available), oily/combination skin (oil-free formula), acne-prone skin (antibacterial properties), and those new to chemical exfoliation. Dry skin types may need additional moisturizer, but the hyaluronic acid provides good baseline hydration.

Most users notice improved hydration and smoothness within 1-2 weeks. Visible improvement in texture and clarity typically occurs at 2-4 weeks. Brightening and fading of dark spots becomes noticeable around 4-6 weeks. Significant improvement in hyperpigmentation and fine lines usually takes 6-12 weeks of consistent use. Results vary based on individual skin concerns and consistency.

Apply this serum after cleansing (and toner if used), before other serums and moisturizer. The order is: Cleanser → Toner (optional) → Mandelic Acid Serum → Wait 30 seconds → Other serums → Moisturizer → SPF (morning only). Use at night, up to 4 times weekly. Always follow with SPF during the day as AHAs increase sun sensitivity.

No, this product is non-comedogenic with a rating of 0. The oil-free, silicone-free formula contains no known pore-clogging ingredients. In fact, it helps unclog pores through gentle exfoliation. It's safe for acne-prone skin and won't cause or worsen breakouts. The formula is also fungal acne safe, making it suitable for those with various types of acne.

The serum has a PAO (Period After Opening) of 12 months. Store in a cool, dark place away from direct sunlight and heat to maintain stability. Note that mandelic acid is light-sensitive, so the opaque packaging helps protect the formula. If the product changes color, smell, or texture, discontinue use.

🏆 Final Verdict

★★★★☆
4.5/5

Good Molecules Mandelic Acid Serum is an exceptional value for sensitive skin types seeking gentle yet effective exfoliation. The unique combination of 10% mandelic acid with PHAs and dual-weight hyaluronic acid delivers results without irritation. Its pregnancy-safe and fungal acne-safe formula makes it one of the most inclusive mandelic acid options on the market. At just $10 for 30ml, it outperforms many premium alternatives. Highly recommended for sensitive, acne-prone, and those new to chemical exfoliation.

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.

Awesome, I Understand!

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

Awesome, I Understand!

Notable Effects & Ingredients

anti-aging Anti-Aging from 3 ingredient(s):
Mandelic Acid Phytic Acid Gluconolactone
brightening Brightening from 3 ingredient(s):
Mandelic Acid Phytic Acid Glycerin
wound Promotes Wound Healing from 3 ingredient(s):
Sodium Hyaluronate Allantoin Glycerin
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!

Awesome, I Understand!

Ingredients Related to Skin Types

Click on icons for more information
dry-skin Dry Skin
2
oily-skin Oily/Acne-Prone Skin
2
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.

Awesome, I Understand!

Ingredient Safety Breakdown

EWG Health Ratings
Low risk
Medium risk
High risk
Unknown risk
76% 23%

Product ingredient list

Showing first 5 of 17 ingredients
EWG CIR Ingredient Name & Cosmetic Functions Notes
1 Unknown
Water
Solvent, Skin Conditioning
1 Unknown
Mandelic Acid
Antimicrobial
brightening Brightening
anti-aging Anti-Aging
1 Unknown
Dimethyl Isosorbide
Solvent, Viscosity Decreasing Agent, Viscosity Controlling
1 Unknown
Propanediol
Solvent, Viscosity Controlling, Viscosity Decreasing Agent
0 Unknown
Potassium Hydroxide
Buffering
VIEW ALL INGREDIENTS