Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Glow Recipe Strawberry BHA Pore-Smooth Blur Drops

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Glow Recipe Strawberry BHA Pore-Smooth Blur Drops This smoothing exfoliator is formulated around Salicylic Acid to refine skin texture and refine the look of pores. This oil-control treatment is for

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Glow Recipe Strawberry BHA Pore-Smooth Blur Drops

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

This oil-control treatment is formulated around Salicylic Acid and Salix Alba Bark Extract to balance excess oil and refine the look of pores.

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

Tapioca Starch

Isopentyldiol

Nylon-12

C9-12 Alkane

Distarch Phosphate

Ammonium Acryloyldimethyltaurate/Vp Copolymer

Saccharide Isomerate

Fragaria Vesca Leaf Extract

Salix Alba Bark Extract

Fragaria Vesca Fruit Extract

Leuconostoc/Radish Root Ferment Filtrate

Sodium Hyaluronate

Bisabolol

Coco-Caprylate/Caprate

Triheptanoin

Pentylene Glycol

Propanediol

Caprylyl Glycol

Polyglyceryl-10 Dioleate

Dilinoleic Acid/Butanediol Copolymer

Polyglyceryl-10 Dipalmitate

Ethylhexylglycerin

1,2-Hexanediol

Phenoxyethanol

Castor Oil/Ipdi Copolymer

Citric Acid

Parfum

Water, Tapioca Starch, Isopentyldiol, Nylon-12, C9-12 Alkane, Distarch Phosphate, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Saccharide Isomerate, Fragaria Vesca Leaf Extract, Salicylic Acid, Salix Alba Bark Extract, Fragaria Vesca Fruit Extract, Leuconostoc/Radish Root Ferment Filtrate, Sodium Hyaluronate, Bisabolol, Coco-Caprylate/Caprate, Triheptanoin, Butylene Glycol, Pentylene Glycol, Propanediol, Caprylyl Glycol, Polyglyceryl-10 Dioleate, Dilinoleic Acid/Butanediol Copolymer, Polyglyceryl-10 Dipalmitate, Ethylhexylglycerin, Sodium Hydroxide, 1,2-Hexanediol, Phenoxyethanol, Castor Oil/Ipdi Copolymer, Citric Acid, Parfum

Reviews

Be the first to review

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.

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.

01

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. 03Acrylates/C10-30 Alkyl Acrylate Crosspolymer is a synthetic polymer. It is used to thicken, emulsify, and improve the texture of products.
  4. 04As an emulsifier, it helps stabilize oil-in-water emulsions to give products an elegant feel when applied.
  5. 05It can also form a thin protective film on skin. One study found that a formula using this polymer helped slow down how quickly other ingredients (like DEET) were absorbed through skin.
  6. 06A 2024 study of over 1,300 patients confirmed that sensitization to this ingredient is rare. It is also non-mutagenic and has a clean track record.
  7. 07Allantoin is a soothing ingredient known for its protective and moisturizing properties; it's basically a quiet workhorse ingredient you can find in a huge range of cosmetics.
  8. 08Though it can be derived from the comfrey plant, allantoin is produced synthetically for cosmetic products to ensure purity.
  9. 09Research shows it can encourage your skin cells to turn over and renew by stimulating keratinocyte and fibroblast proliferation.
  10. 10It also has mild keratolytic properties to help loosen and shed dead skin cells without being harsh.
  11. 11Studies also suggest allantoin can help calm inflammation by dialing down some of the chemical signals your skin sends out when it is irritated.
  12. 12This ingredient is typically used in the 0.1-0.5% range, and the FDA recognizes it as a skin protectant in OTC products up to 2%.
  13. 13Overall, allantoin is a wonderful addition to most routines; it is stable across a wide pH range (~4-8), works well with other ingredients, and is considered non-sensitizing/non-irritating.
  14. 14Fun fact: Allantoin is naturally occurring in comfrey root, beets, chamomile, and wheat sprouts. Our bodies even produce it as a byproduct of uric acid metabolism.
  15. 15Benzoyl Peroxide (BPO) is one of the most studied and widely used acne-fighting ingredients on the market for over five decades.
  16. 16It works by releasing oxygen into your pores to kill Cutibacterium acne, or the bacteria closely linked to acne breakouts. This bacteria has a hard time surviving in an oxygen-rich environment.
  17. 17On top of that, BPO has keratolytic properties to help shed dead skin cells and keep pores from getting clogged.
  18. 18One of the coolest things about BPO is that bacteria do not develop resistance to it the way they can with antibiotics. That's why dermatologists recommend pairing it with topical antibiotics to keep resistance at bay.
  19. 19BPO is usually available in 2.5%, 5%, and 10% concentrations. Research has shown that 2.5% tends to be just as effective as the higher strengths while being more gentle on the skin.
  20. 20The FDA has classified BPO as a safe and effective acne treatment. You'll be able to find this ingredient in over-the-counter products in many countries.
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side