Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

Naturium BHA Liquid Exfoliant 2% Versus Paula's Choice Skin Perfecting 2% BHA Gel Exfoliant

Naturium BHA Liquid Exfoliant 2% Versus Paula's Choice Skin Perfecting 2% BHA Gel Exfoliant This smoothing exfoliator is formulated around Salicylic Acid to refine skin texture and refine the look of pores. This pore-care exfoliator is formulated around Salicy

Naturium BHA Liquid Exfoliant 2% Versus Paula's Choice Skin Perfecting 2% BHA Gel Exfoliant

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

This pore-care exfoliator is formulated around Salicylic Acid and Phytosphingosine to refine the look of pores and refine skin texture.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Butylene Glycol

Propanediol

Salicylic Acid

Sodium Polyacrylate

Citric Acid

Glycerin

Diglycerin

Citrus Glauca Fruit Extract

Microcitrus Australasica Fruit Extract

Microcitrus Australis Fruit Extract

Hydroxyacetophenone

Carrageenan

Phenoxyethanol

Sodium Phytate

Caprylyl Glycol

Phenylpropanol

Tocopherol

Water, Butylene Glycol, Propanediol, Salicylic Acid, Sodium Polyacrylate, Citric Acid, Glycerin, Diglycerin, Citrus Glauca Fruit Extract, Microcitrus Australasica Fruit Extract, Microcitrus Australis Fruit Extract, Hydroxyacetophenone, Carrageenan, Phenoxyethanol, Sodium Phytate, Caprylyl Glycol, Phenylpropanol, Tocopherol

Methylpropanediol

Polysorbate 20

Phytosphingosine

Hydroxyethylcellulose

Vitis Vinifera Seed Extract

Camellia Oleifera Leaf Extract

Epilobium Angustifolium Extract

Bisabolol

Tetrasodium EDTA

Sodium Hydroxide

Water, Methylpropanediol, Butylene Glycol, Polysorbate 20, Salicylic Acid, Phytosphingosine, Hydroxyethylcellulose, Vitis Vinifera Seed Extract, Camellia Oleifera Leaf Extract, Epilobium Angustifolium Extract, Bisabolol, Tetrasodium EDTA, Sodium Hydroxide

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.

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 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. 07Aloe Barbadensis Leaf Juice is the filtered, stabilized liquid pressed from the inner gel of the aloe vera leaf.
  8. 08In cosmetics, it shows up as either soothing active or a water-replacement base. It is roughly 98-99% water and the last 1-2% is an interesting mix of polysaccharides, amino acids, vitamins, minerals, and enzymes.
  9. 09The polysaccharides do most of the work: they bind water at the skin surface for a light, non-greasy hydration boost. And one of the polysaccharides, glycomannan, is linked to fibroblast stimulation + collagen synthesis. This is also why aloe has su…
  10. 10This ingredient is also calming with anti-inflammatory and mild antimicrobial activity, making it a great pick for sensitive, irritated, or post-sun skin.
  11. 11Realistic expectations matter though; the solid evidence is mostly limited to hydration, soothing, and wound support. Deeper claims about anti-aging or sun protection are not well backed, and science reviews note it does not prevent radiation-induce…
  12. 12Because it plays well with almost everything, it's commonly used as a base alongside other actives like niacinamide or vitamin C.
  13. 13Typical usage concentrations range from 0.5% (where hydration benefits already show up) all the way to 90%+ (where it replaces water as the main base).
  14. 14The safety for this ingredient is well-establish as well. Overall, this is a great supporting ingredient for those who want a boost in hydration.
  15. 15Also known as Avobenzone, this ingredient is an oil-soluble used to absorb the full spectrum of UVA rays (peak 357 nm).
  16. 16It's one of the most effective UVA filters available but has a major caveat of photostability: avobenzone is susceptible to photodegradation.
  17. 17This means it can lose efficacy when exposed to sunlight without the help of a stabilizing agent.
  18. 18Studies show antioxidants (like vitamin E or vitamin C) and some UV filters (like octocrylene and Tinosorb S) can meaningfully improve its stability in a formulation.
  19. 19The maximum allowable concentration according to regulation is 3% in the US + Canada, and 5% in the EU, Australia, China, Korea, and ASEAN countries.
  20. 20It has a well-support safety profile: a comprehensive 2025 review found minimal toxicity with no evidence of carcinogenicity.
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side