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A hand holding a bottle of The Ordinary skincare product in front of a green plant background. The label on the bottle indicates it is Lactic Acid 10% + HA 2%.

Best Lactic Acid Serum for Sensitive Skin: A Simple Guide

Chapter 1. Introduction

1.1. Overview of Lactic Acid Serums

Lactic acid is a type of alpha hydroxy acid (AHA) that comes from milk or fermented plants. It’s popular in skincare because it gently exfoliates the skin. Unlike other AHAs, lactic acid has a larger molecular size, which means it doesn’t go too deep into the skin, making it perfect for sensitive skin.

1.2. Importance of Using Lactic Acid Serum for Sensitive Skin

Sensitive skin needs special care to avoid irritation. Lactic acid serums provide a mild exfoliation that helps remove dead skin cells without causing redness or discomfort. This makes them a great choice for people with sensitive skin who want to improve their skin texture and tone.


A bottle of The Ordinary Lactic Acid 10% + HA skincare product next to its packaging box. The bottle has a dropper cap and is labeled with the product name and description, indicating it is a high-strength lactic acid superficial peeling formulation. The box reiterates the product details and contains 30 mL or 1 fl. oz of the solution.

Chapter 2. Benefits of Lactic Acid Serum for Sensitive Skin

2.1. Exfoliation and Smoothening

Lactic acid helps break down the bonds between dead skin cells, making it easier to remove them and reveal smoother, softer skin underneath. This gentle exfoliation is key to keeping a healthy skin barrier.

2.2. Hydration and Moisturization

Lactic acid is also a humectant, which means it attracts and holds moisture in the skin. This makes it especially good for dry and sensitive skin types.

2.3. Brightening and Evening Out Skin Tone

Using lactic acid regularly can help reduce dark spots and uneven skin tone. It speeds up cell turnover, which helps fade discolorations over time.

2.4. Gentle on Sensitive Skin

Because of its larger molecular size, lactic acid exfoliates the skin more gently, reducing the risk of irritation. This makes it suitable for those with sensitive skin who might find other AHAs too harsh.


A bottle of The Ordinary skincare product with a dropper cap. The label indicates it is Lactic Acid 10% + HA, a high-strength lactic acid superficial peeling formulation.

Chapter 3. How to Choose the Right Lactic Acid Serum

3.1. Understanding Your Skin Type

Before picking a lactic acid serum, it’s important to know your skin type. Sensitive skin can be dry, oily, or a mix, and knowing your specific needs will help you choose the right product.

3.2. Checking the Concentration of Lactic Acid

Lactic acid serums come in different strengths, usually between 5% and 10%. For sensitive skin, it’s best to start with a lower concentration to avoid irritation.

3.3. Considering Additional Ingredients

Look for serums that also have soothing and hydrating ingredients like hyaluronic acid, glycerin, and aloe vera. These can help reduce any potential irritation from the lactic acid and provide extra benefits for your skin.


A single, perfectly round, transparent bubble with a thin orange outline against a plain white background.

Chapter 4. Using Lactic Acid Serum in Your Skincare Routine

4.1. Precautions and Patch Testing

Always do a patch test before adding a new lactic acid serum to your routine. Apply a small amount to a discreet area and wait 24 hours to see if you have any adverse reactions.

4.2. Frequency of Use

Start by using the serum once or twice a week, and gradually increase the frequency as your skin gets used to it. Overusing it can cause irritation, so it’s important to pay attention to how your skin responds.

4.3. Combining with Other Skincare Products

Lactic acid can be used with other skincare products, but avoid mixing it with other strong acids or retinoids to prevent irritation. Pairing it with hydrating and soothing products can enhance its benefits.


Image of a skincare product from The Ordinary, specifically the Lactic Acid 10% + HA 2% peeling formulation. The product is in a dropper bottle with a white label that includes the brand name and product details. To the right, there are bullet points listing the product benefits as exfoliating and active ingredients as Lactic Acid, followed by the net quantity stated as 30.0 Millilitre.

Chapter 5. Incorporating Lactic Acid Serum for Sensitive Skin in Your Daily Routine

5.1. Morning Routine

In the morning, cleanse your face with a gentle cleanser, apply a hydrating toner, and then use the lactic acid serum. Follow up with a moisturizer and sunscreen to protect your skin from UV damage.

5.2. Evening Routine

In the evening, after cleansing and toning, apply the lactic acid serum. Follow with a nourishing moisturizer to lock in hydration and support the skin’s overnight repair process.

5.3. Weekly Treatments

Consider adding a weekly mask or treatment that complements the lactic acid serum. This can help boost the overall effectiveness of your skincare routine.


A bottle of The Ordinary skincare product with a dropper cap, labeled as “Lactic Acid 10% + HA”, next to its packaging box.

Chapter 6. FAQs about Lactic Acid Serum for Sensitive Skin

6.1. Can Lactic Acid Serums Cause Irritation on Sensitive Skin?

While lactic acid is generally well-tolerated, it can cause irritation if used too much or if the concentration is too high. Always start with a lower concentration and do a patch test.

6.2. How Long Does It Take to See Results with a Lactic Acid Serum?

Results can vary, but most people start to see improvements in skin texture and tone within a few weeks of regular use. Consistency is key to getting the best results.

6.3. Can Lactic Acid Serums Be Used with Other Active Ingredients?

Lactic acid can be used with other active ingredients, but it’s important to avoid combining it with other strong acids or retinoids to prevent irritation. Pairing it with hydrating and soothing products is recommended.


A bottle of The Ordinary Lactic Acid 5% + HA next to its packaging box on a plain background. The product is described as a mild lactic acid superficial peeling formulation.

Chapter 7. Conclusion

7.1. Recap of Benefits of Using Lactic Acid Serum for Sensitive Skin

Lactic acid serums offer gentle exfoliation, hydration, and brightening benefits, making them ideal for sensitive skin. They help improve skin texture and tone without causing significant irritation.

7.2. Final Thoughts on Incorporating Lactic Acid Serum in Your Skincare Routine

Adding a lactic acid serum to your skincare routine can provide many benefits, especially for those with sensitive skin. By choosing the right product and using it correctly, you can achieve smoother, brighter, and healthier skin.


A damaged product package with a skincare bottle and its box on a wooden surface.

Chapter 8. Common Misconceptions about Lactic Acid Serums

8.1. Lactic Acid Serums Are Too Harsh for Sensitive Skin

  • Fact: Lactic acid is one of the gentler AHAs because it doesn’t penetrate deeply, reducing irritation risk.
  • Myth: All exfoliating acids cause redness and peeling.
  • Reality: When used correctly, lactic acid can gently exfoliate without causing significant irritation, making it suitable for sensitive skin.

8.2. Lactic Acid Serums Can Only Be Used at Night

  • Fact: While AHAs can make the skin more sensitive to sunlight, lactic acid serums can be used during the day if followed by a broad-spectrum sunscreen.
  • Myth: Daytime use of lactic acid will always lead to sunburn.
  • Reality: Proper sun protection can mitigate the increased photosensitivity caused by lactic acid.

8.3. Higher Concentrations Are Always Better

  • Fact: For sensitive skin, starting with a lower concentration (around 5%) is advisable to avoid irritation.
  • Myth: Higher concentrations yield faster results.
  • Reality: Gradual introduction and consistent use of lower concentrations can be more effective and safer for sensitive skin.


A bottle of The Ordinary skincare product with a dropper next to its packaging box. The label indicates it is a lactic acid 10% + HA 2% high-strength lactic acid superficial peeling formulation. The bottle contains 30 mL or 1 fl oz of the product.

Chapter 9. Scientific Evidence Supporting Lactic Acid Use

9.1. Clinical Studies on Lactic Acid

  • Study 1: A study published in the Journal of the American Academy of Dermatology found that lactic acid significantly improves skin texture and hydration.
  • Study 2: Research in the International Journal of Cosmetic Science showed that lactic acid can enhance skin barrier function and reduce signs of aging.

9.2. Dermatologist Recommendations

  • Expert Opinion: Dermatologists often recommend lactic acid for its gentle exfoliating properties, especially for patients with sensitive skin.
  • Usage Guidelines: Experts suggest starting with a lower concentration and gradually increasing as the skin builds tolerance.

9.3. Comparative Studies with Other AHAs

  • Comparison: Studies comparing lactic acid with glycolic acid show that lactic acid is less likely to cause irritation while still providing effective exfoliation.
  • Conclusion: Lactic acid is a preferred choice for those with sensitive skin due to its milder nature.


A hand holding a bottle of The Ordinary skincare product in front of a green plant background. The label on the bottle indicates it is Lactic Acid 10% + HA 2%.

Chapter 10. Real-World User Experiences

10.1. Positive Feedback from Users

  • Testimonial 1: Users with sensitive skin report smoother, more hydrated skin after consistent use of lactic acid serums.
  • Testimonial 2: Many users appreciate the gentle exfoliation without the harsh side effects often associated with other AHAs.

10.2. Common Challenges and Solutions

  • Challenge: Initial mild tingling or redness.
  • Solution: Start with a lower concentration and use the serum less frequently until the skin adjusts.

10.3. Tips from Skincare Enthusiasts

  • Tip 1: Always follow up with a moisturizer to lock in hydration and soothe the skin.
  • Tip 2: Incorporate sunscreen into your daily routine to protect against increased photosensitivity.

 

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