What Are PHAs in Skincare?

In the ever-evolving world of skincare, new ingredients and formulations emerge frequently, each promising to enhance the beauty and health of your skin. One such ingredient that has gained attention recently is PHAs or Polyhydroxy Acids. What are PHAs in skincare?

Though they are not as widely known as their more popular counterparts, AHAs (Alpha Hydroxy Acids) and BHAs (Beta Hydroxy Acids), PHAs offer a range of skin benefits that make them an excellent choice for specific skin concerns. Whether you’re new to skincare or an expert, understanding PHAs can help you make more informed choices when building your skincare routine.

I participate in affiliate programs, including Amazon Affiliates, and may earn a small commission if you purchase items through

What Are PHAs in Skincare?

PHAs, or Polyhydroxy Acids, are a group of chemical exfoliants similar to AHAs and BHAs, but with a key difference: they have larger molecular structures. This structural difference impacts how they interact with the skin, making PHAs gentler and more suitable for sensitive skin. The most common PHAs in skincare include gluconolactone, lactobionic acid, and maltobionic acid.

Like AHAs, PHAs work by exfoliating the skin’s surface, removing dead skin cells, and promoting a smoother, brighter complexion. However, due to their larger molecular size, PHAs do not penetrate the skin as deeply or as aggressively as AHAs or BHAs. This results in gentler exfoliation, making PHAs a great alternative for sensitive skin or those new to chemical exfoliation.

How Do PHAs Work?

PHAs work by loosening the bonds between dead skin cells on the outermost layer of your skin, known as the stratum corneum. This process, called exfoliation, helps to reveal fresher, smoother skin underneath. When used regularly, PHAs can also improve skin texture, minimize the appearance of fine lines and wrinkles, and promote an even skin tone.

Because PHAs have a larger molecular structure, they remain on the skin’s surface for extended periods, allowing for a slow, steady exfoliation. This provides less irritation and mainly benefits those with sensitive or reactive skin. Additionally, PHAs have humectant properties, meaning they help draw moisture into the skin, further contributing to their gentler nature.

Key Benefits of PHAs in Skincare

Gentler Exfoliation

The most significant benefit of PHAs is their ability to provide exfoliation without the harshness that can sometimes accompany AHAs or BHAs. Their larger molecular size means they don’t penetrate the skin as deeply, which reduces the likelihood of irritation, redness, or peeling. This makes PHAs an excellent choice for sensitive skin, rosacea, or conditions like eczema, which stronger acids can aggravate.

Hydration and Moisture Retention

Unlike some other exfoliating acids, PHAs also have hydrating properties. PHAs help retain moisture in the skin by drawing water to the skin’s surface and preventing transepidermal water loss (TEWL). This can result in plump, hydrated skin, especially with moisturizers that lock in this hydration. For dry skin, PHAs provide gentle exfoliation without stripping the skin of its natural moisture.

Improved Skin Texture and Tone

Regular use of PHAs can improve overall skin texture by removing dead skin cells, promoting cell turnover, and revealing smoother, softer skin. Over time, PHAs can also help with issues like hyperpigmentation and dark spots, giving your skin a more even and radiant appearance. For individuals dealing with rough patches, dullness, or uneven skin tone, PHAs can offer noticeable improvements.

Anti-Aging Properties

PHAs are also known for their anti-aging benefits. By gently exfoliating the skin, PHAs can reduce the appearance of fine lines and wrinkles. They stimulate the production of new skin cells, which can help keep your skin looking fresh and youthful. Some PHAs, like lactobionic acid, have antioxidant properties, protecting the skin from oxidative stress and environmental damage that can contribute to premature aging.

Suitable for Sensitive Skin

Because PHAs are less likely to irritate AHAs or BHAs, they are ideal for people with sensitive or reactive skin. Those prone to redness, irritation, or allergic reactions to stronger acids often find PHAs a gentler alternative. PHAs can be used by individuals with rosacea or those recovering from laser treatments, offering mild exfoliation without triggering flare-ups or discomfort.

Antioxidant Protection

Some PHAs, such as lactobionic acid, are known to have antioxidant properties. Antioxidants help neutralize free radicals in the skin, which are unstable molecules that can cause damage to skin cells and accelerate aging. By protecting the skin from oxidative stress, PHAs can help maintain a healthier, more youthful complexion.

Who Can Benefit from PHAs?

PHAs are suitable for a wide range of skin types, but they are especially beneficial for those with:

  • Sensitive Skin: PHAs provide gentle exfoliation, making them ideal for sensitive or reactive skin. People with conditions like rosacea, eczema, or acne can often use PHAs without irritation.
  • Dry or Dehydrated Skin: The humectant properties of PHAs help draw moisture to the skin, making them an excellent choice for those with dry, flaky, or dehydrated skin.
  • Aging Skin: As a mild exfoliant with anti-aging benefits, PHAs are perfect for those who want to address fine lines, wrinkles, and signs of aging without harsh treatments.
  • Those New to Exfoliation: PHAs can be a good starting point if you’re new to chemical exfoliation. Their gentler action means you can gradually introduce exfoliating acids into your routine without worrying about over-exfoliating.

How to Incorporate PHAs into Your Skincare Routine

Learning what are PHAs in skincare is only half the battle. It’s crucial to learn how to use them to enjoy the benefits. If you’re considering incorporating PHAs into your skincare routine, here’s how you can do so effectively:

Choose the Right Product

PHAs come in various forms, including serums, toners, creams, and masks. Look for a product that suits your skin type and addresses your skincare concerns. A mild PHA toner or serum would be a good starting point if you have sensitive skin. A PHA mask can provide deeper exfoliation and nourishment.

BlissPro Liquid Exfoliate

BlissPro Liquid Exfoliate is packed with the perfect balance of PHAs, BHAs, and AHAs to gently exfoliate your skin, promoting cell turnover and fast results. It helps provide an even skin tone while combatting the signs of aging. However, remember that this isn’t suitable for sensitive skin. 

Why You’ll Love It
  • Fast results
  • Vegan
  • Cruelty-free
  • Antioxidant complex
  • Fragrance-free

Check it out here!

Start Slowly

Even though PHAs are gentle, starting slowly when introducing any new exfoliant is always best. Use the product once or twice weekly, gradually increasing frequency as your skin builds tolerance. Over-exfoliating can lead to dryness, redness, and irritation, so listen to your skin and adjust as needed.

Apply After Cleansing

When using a PHA product, apply it to freshly cleansed skin. If you’re using a toner, apply it with a cotton pad, gently sweeping it over your face. If you use a serum or cream, apply it to your skin and follow up with a moisturizer to lock in hydration.

Always Follow with Sunscreen

Exfoliating acids can make your skin more sensitive to the sun, so applying sunscreen every morning is crucial. Look for a broad-spectrum sunscreen with an SPF of 30 or higher to protect your skin from harmful UV rays and prevent further damage.

Combine with Other Skincare Ingredients

PHAs can be combined with other skincare ingredients like vitamin C, retinoids, or hyaluronic acid. However, be cautious when layering exfoliants with active ingredients, as this can lead to irritation. If using a PHA product with other acids, ensure your skin can tolerate the combination, or use them on alternate days.

Potential Side Effects of PHAs

PHAs are generally considered safe for most skin types, but overuse can lead to side effects as with any exfoliant. Some possible side effects include:

  • Dryness: Over-exfoliation can strip the skin of natural oils, leading to dryness or flakiness.
  • Irritation: While PHAs are less likely to irritate the skin than AHAs or BHAs, excessive use can still cause redness, stinging, or burning, especially if your skin is not accustomed to exfoliation.

If you experience these issues, reduce the frequency or discontinue use entirely and consult a dermatologist.

What Are PHAs in Skincare

PHAs are a fantastic option for anyone looking for a gentler, more hydrating exfoliant. Their ability to exfoliate while keeping the skin moisturized and protected makes them an excellent choice for sensitive skin, dry skin, and those looking to address signs of aging. Incorporating PHAs into your skincare routine allows you to enjoy smoother, brighter, and healthier-looking skin without the irritation that often accompanies stronger acids. Check out the rest of the site to learn more!

Related Articles

Silica In Skincare

Cool Australian Skincare Hacks

Benefits of Gold on Skin

Leave a ReplyCancel reply