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Skin science article

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Pixi Beauty Clarity Tonic

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Pixi Beauty Clarity Tonic This smoothing exfoliator is formulated around Salicylic Acid to refine skin texture and refine the look of pores. This smoothing toner is formulated around Aloe Barbadensi

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Pixi Beauty Clarity Tonic

This smoothing exfoliator is formulated around Salicylic Acid to refine skin texture and refine the look of pores.

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

Methylpropanediol

Butylene Glycol

Salicylic Acid

Polysorbate 20

Camellia Oleifera Leaf

Sodium Hydroxide

Tetrasodium EDTA

Water, Methylpropanediol, Butylene Glycol, Salicylic Acid, Polysorbate 20, Camellia Oleifera Leaf, Sodium Hydroxide, Tetrasodium EDTA

Aloe Barbadensis Leaf Juice

Propanediol

Glycerin

Sodium PCA

Betaine

Lactobacillus Ferment Lysate Filtrate

Glycolic Acid

Sodium Hyaluronate

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

Ethylhexylglycerin

Citric Acid

Potassium Sorbate

Sodium Benzoate

Phenoxyethanol

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.

Salicylic Acid (also known as beta hydroxy acid or BHA) is a well-known ingredient for treating skin that struggles with acne and clogged pores. It exfoliates both the skin's surface and deep within the pores to help clear out buildup, control oil, and reduce inflammation.

Unlike AHAs (alpha hydroxy acids), salicylic acid is oil-soluble. This allows it to penetrate into pores which makes it especially effective for treating blackheads and preventing future breakouts.

Salicylic acid is also known for its soothing properties. It has a similar structure to aspirin and can calm inflamed or irritated skin, making it a good option for acne-prone skin that is also sensitive.

Concentrations of 0.5-2% are recognized by the U.S. FDA as an over-the-counter topical acne product.

It can cause irritation and/or dryness if one's skin already has a compromised moisture barrier, so it's best to focus on repairing that before introducing this ingredient into your routine.

While salicylic acid does not increase sun sensitivity, it’s still important to wear sunscreen daily to protect your skin.

If you are looking for the ingredient called BHA or Butylated Hydroxyanisole, click here.

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.

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Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Explained

  1. 01These ingredients are found in both products.
  2. 02Ingredients higher up in an ingredient list are typically present in a larger amount.
  3. 03Dipropylene Glycol is a synthetically created humectant, stabilizer, and solvent.
  4. 04This ingredient helps:
  5. 05Dipropylene glycol is technically an alcohol, but it belongs to the glycol family (often considered part of the ‘good’ alcohols). This means it is hydrating and gentle on skin unlike drying solvent alcohols like denatured alcohol.
  6. 06As a masking agent, Dipropylene Glycol can be used to cover the smell of other ingredients. However, it does not have a scent.
  7. 07Studies show Dipropylene Glycol is considered safe to use in skincare.
  8. 08Ferulic Acid is a plant based antioxidant that can be naturally found in the cell walls of grains like rice, oats, and corn. It has antioxidant and antimicrobial properties, and has the ability to boost the performance of other antioxidants as well.
  9. 09A well-known study found that adding Ferulic Acid to a solution of Vitamins C and E doubled the photoprotection of skin. This is why you'll often see it paired with Vitamin C or Vitamin E serums rather than sold on its own.
  10. 10A 2025 review of 18 human studies found that using Ferulic Acid (0.5-1%) daily for one to three months showed improvements in:
  11. 11As far as allergies go, Ferulic acid is generally well-tolerated but can cause an allergic reaction in very rare cases. It's also worth noting that Ferulic acid is often extracted from plant sources like rice bran or wheat bran, so be sure to path t…
  12. 12Outside of skincare, researchers are also looking into Ferulic Acid for its potential benefits in areas like diabetes, Alzheimer's, and heart health.
  13. 13Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
  14. 14Topically, glycerin does several things at once:
  15. 15Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
  16. 16Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
  17. 17This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
  18. 18Just know very high concentrations (>40%) can feel tacky in low humidity.
  19. 19Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
  20. 20Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).
Source · skinsort.com
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Product index

Related product references

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Comparison edit

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