Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Paula's Choice BHA 9 Treatment

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Paula's Choice BHA 9 Treatment This smoothing exfoliator is formulated around Salicylic Acid to refine skin texture and refine the look of pores. This acne treatment is formulated around Salicylic A

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Paula's Choice BHA 9 Treatment

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

This acne treatment is formulated around Salicylic Acid to clear breakouts 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

Propylene Glycol

PEG-75 Stearate

PEG-8

Glycerin

Avena Sativa Kernel Extract

Boerhavia Diffusa Root Extract

Sea Whip Extract

Arginine

Disodium EDTA

Propylene Glycol, PEG-75 Stearate, PEG-8, Water, Salicylic Acid, Glycerin, Avena Sativa Kernel Extract, Butylene Glycol, Boerhavia Diffusa Root Extract, Sea Whip Extract, Arginine, Polysorbate 20, Disodium EDTA

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.

Polysorbate 20 is a gentle, water-soluble emulsifier and mild surfactant. It stops oil and water from separating to keep your formulas blended and stable.

It also acts as a mild penetration enhancer by helping active ingredients absorb slightly better.

The common safety discussion around this ingredient involves a manufacturing byproduct called 1,4-dioxane.

Trace amounts can form during production but the EU's Scientific Committee on Consumer Safety has concluded that levels at/below 10 ppm in finished products are safe (commercial products consistently fall within acceptable margins).

True allergic reactions are uncommon and the CIR Expert Panel has confirmed this ingredient to be safe as used in cosmetics.

Because it is derived from lauric acid, it may not be fungal acne safe.

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.

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. 01Salicylic Acid 2%
  2. 02Water
  3. 03Methylpropanediol
  4. 04Butylene Glycol
  5. 05Polysorbate 20
  6. 06Camellia Oleifera Leaf Extract
  7. 07Sodium Hydroxide
  8. 08Tetrasodium EDTA
  9. 09Phenoxyethanol
  10. 10Salicylic Acid 2%, Water, Methylpropanediol, Butylene Glycol, Polysorbate 20, Camellia Oleifera Leaf Extract, Sodium Hydroxide, Tetrasodium EDTA, Phenoxyethanol
  11. 11Propanediol
  12. 12Mandelic Acid
  13. 13Salicylic Acid
  14. 14Xylitylglucoside
  15. 15Anhydroxylitol
  16. 16Xylitol
  17. 17Sarcosine
  18. 18Pentylene Glycol
  19. 19Glucose
  20. 20Xanthan Gum
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side