Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

The INKEY List Glycolic Acid Toner Versus La Roche-Posay Effaclar Clarifying Solution Acne Toner

The INKEY List Glycolic Acid Toner Versus La Roche-Posay Effaclar Clarifying Solution Acne Toner This smoothing toner is formulated around Glycolic Acid to refine skin texture and brighten dull-looking skin. This acne toner is formulated around Salicylic Acid

The INKEY List Glycolic Acid Toner Versus La Roche-Posay Effaclar Clarifying Solution Acne Toner

This smoothing toner is formulated around Glycolic Acid to refine skin texture and brighten dull-looking skin.

This acne toner is formulated around Salicylic Acid and Glycolic Acid to clear breakouts and refine skin texture.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Glycolic Acid

Propanediol

Hamamelis Virginiana Water

Sodium Hydroxide

Butylene Glycol

Phenoxyethanol

Alcohol

PPG-26-Buteth-26

Betaine

PEG-40 Hydrogenated Castor Oil

Boerhavia Diffusa Root Extract

Ethylhexylglycerin

Trisodium Ethylenediamine Disuccinate

Water, Glycolic Acid, Propanediol, Hamamelis Virginiana Water, Sodium Hydroxide, Butylene Glycol, Phenoxyethanol, Alcohol, PPG-26-Buteth-26, Betaine, PEG-40 Hydrogenated Castor Oil, Boerhavia Diffusa Root Extract, Ethylhexylglycerin, Trisodium Ethylenediamine Disuccinate

Salicylic Acid

Alcohol Denat.

Capryloyl Glycine

Benzyl Alcohol

Menthol

Tremella Fuciformis Polysaccharide

Ophiopogon Japonicus Root Extract

Scutellaria Baicalensis Root Extract

Salicylic Acid, Water, Alcohol Denat., Propanediol, Glycolic Acid, Sodium Hydroxide, Capryloyl Glycine, Phenoxyethanol, Benzyl Alcohol, PPG-26-Buteth-26, PEG-40 Hydrogenated Castor Oil, Menthol, Tremella Fuciformis Polysaccharide, Butylene Glycol, Ophiopogon Japonicus Root Extract, Scutellaria Baicalensis Root Extract

Reviews

Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:

Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.

Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.

Glycolic Acid is arguably the most famous alpha hydroxy acid (AHA) with tons of research backing its benefits.

It is found naturally in sugar cane but the form used in skincare is usually synthetic for purity and stability.

Glycolic acid removes the top layer of dead skin cells to allow newer and fresher ones to emerge.

AHAs work by breaking down the structural “glue” that holds old skin cells in place. When that buildup is gone, your skin can renew itself more efficiently.

Research also shows glycolic acid stimulates collagen production, helping to firm and thicken the skin over time. This is one of its biggest advantages over other AHAs.

Overall, glycolic acid helps with:

Fun fact: Glycolic acid boosts skin hydration by helping it produce molecules that increase hyaluronic acid naturally.

To work best, glycolic acid products should have a pH between 3-4 (that’s where exfoliation is most effective but still gentle on skin).

The pH and concentration of a product are key to its effectiveness:

It is normal to feel a slight stinging sensation when using glycolic acid. This usually fades as your skin adjusts.

Because glycolic acid has the smallest molecular size in the AHA family, it can penetrate deeper, which enhances its effectiveness but also makes it more likely to irritate sensitive skin.

If your skin is very sensitive or prone to rosacea, glycolic acid may be too strong; in that case, try milder options like lactic acid or a PHA instead.

Recent studies suggest glycolic acid might even help protect against UV damage. But don’t skip sunscreen! Freshly exfoliated skin is more sensitive to the sun.

Glycolic acid is a skincare superstar. It smooths, brightens, hydrates, and firms the skin. Unless you’re highly sensitive, it’s well worth adding to your routine.

Read more about some other popular AHA's here:

PEG-40 Hydrogenated Castor Oil is an emulsifier derived from castor oil.

As an emulsifying agent, it helps other ingredients like fragrances and fat-soluble vitamins dissolve cohesively.

Due to its large molecule size, it doesn't penetrate beyond the skin's surface.

This ingredient has a solid regulatory track record; the CIR Expert Panel first concluded it was safe for use in cosmetics at concentrations up to 100% in 1997. A 2012 reassessment reaffirmed that finding. Safety studies have also found no irritation or evidence of toxicity.

A 2019 study did find this ingredient to grow Malassezia, so this ingredient may not be fungal acne safe.

Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).

It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.

On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.

Another perk of this ingredient is that it stays functional across a wide pH range (3-10).

You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.

Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.

Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.

Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.

We don't have a description for PPG-26-Buteth-26 yet.

Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.

It’s often used to:

Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.

Sodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.

In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.

Your skin has a natural pH and acid mantle. This acid mantle helps prevent harmful bacteria from breaking through. The acid mantle also helps keep your skin hydrated.

"Alkaline" refers to a high pH level. A low pH level would be considered acidic.

Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.

So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.

You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!

Similar Comparisons

The reference edit

Ingredients, questions
& further reading.

Connected source records selected through this article’s public topic index.

01

Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Side-by-side

  1. 01Water
  2. 02Glycerin
  3. 03Butylene Glycol
  4. 04Propanediol
  5. 05Dicaprylyl Carbonate
  6. 06Retinyl Acetate
  7. 07Dimethicone
  8. 08Phenoxyethanol
  9. 09Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
  10. 10Caprylyl Glycol
  11. 11Phospholipids
  12. 12Squalane
  13. 13Glycine Soja Oil
  14. 14Carbomer
  15. 15Polysorbate 60
  16. 16Tocopheryl Acetate
  17. 17Glycolipids
  18. 18Sodium Hydroxide
  19. 19Sodium Phytate
  20. 20Sorbitan Isostearate
Source · skinsort.com
02

Product index

Related product references

Product

The Inkey List Seakelp Serum

The Inkey List Seakelp Serum The Inkey List Seakelp Serum ingredients explained: Aqua (Water/Eau), Macrocystis Pyrifera (Kelp) Extract, Phenoxyethanol, Glycerin, Xanthan Gum, Sodium Levulin…

Source: incidecoder.comView reference →
03

Comparison edit

Read side by side