Skin science article
The INKEY List Glycolic Acid Toner Versus Pixi Beauty Clarity Tonic
The INKEY List Glycolic Acid Toner Versus Pixi Beauty Clarity Tonic This smoothing toner is formulated around Glycolic Acid to refine skin texture and brighten dull-looking skin. This smoothing toner is formulated around Aloe Barbadensis Leaf Juice and Glycoli
The INKEY List Glycolic Acid Toner Versus Pixi Beauty Clarity Tonic
This smoothing toner is formulated around Glycolic Acid to refine skin texture and brighten dull-looking skin.
This smoothing toner is formulated around Aloe Barbadensis Leaf Juice and Glycolic Acid to refine skin texture and clear breakouts.
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
Aloe Barbadensis Leaf Juice
Glycerin
Sodium PCA
Lactobacillus Ferment Lysate Filtrate
Sodium Hyaluronate
Salicylic Acid
Glycyrrhiza Glabra Root Extract
Salix Alba Bark Extract
Magnesium Ascorbyl Phosphate
Centella Asiatica Extract
Saccharum Officinarum Extract
Leuconostoc/Radish Root Ferment Filtrate
Populus Tremuloides Bark Extract
Lactic Acid
Sodium Citrate
Citric Acid
Potassium Sorbate
Sodium Benzoate
Water, Aloe Barbadensis Leaf Juice, Propanediol, Glycerin, Sodium PCA, Betaine, Lactobacillus Ferment Lysate Filtrate, Glycolic Acid, Sodium Hyaluronate, Salicylic Acid, Glycyrrhiza Glabra Root Extract, Salix Alba Bark Extract, Magnesium Ascorbyl Phosphate, Centella Asiatica Extract, Saccharum Officinarum Extract, Leuconostoc/Radish Root Ferment Filtrate, Populus Tremuloides Bark Extract, Lactic Acid, Sodium Citrate, Sodium Hydroxide, Ethylhexylglycerin, Citric Acid, Potassium Sorbate, Sodium Benzoate, Phenoxyethanol
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.
Betaine is a humectant. Like hyaluronic acid, it helps attract and retain moisture in the skin. It’s known for being gentle and for helping the skin maintain balanced hydration.
Betaine is mainly used to improve hydration and support calmer skin. It helps skin cells regulate water balance because it functions as an osmolyte.
Some studies suggest betaine may support making skin tone more even.
Fun fact: Betaine naturally exists in the skin and the body. In cosmetic products, it can be either plant-derived (most commonly from sugar beets) or synthetically produced for consistency and stability.
Betaine is also known as trimethylglycine.
Ethylhexylglycerin is created from glycerin. It is a multitasker ingredient that:
The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure.
Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations.
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:
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.
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!