Good Molecules Overnight Exfoliating Treatment Versus Paula's Choice 8% AHA Lotion Exfoliant

Good Molecules Overnight Exfoliating Treatment Versus Paula's Choice 8% AHA Lotion Exfoliant

This smoothing treatment is formulated around Glycolic Acid and Lactic Acid to refine skin texture and brighten dull-looking skin.

This smoothing exfoliator is formulated around Glycolic Acid to refine skin texture and brighten dull-looking skin.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Glycolic Acid

Sodium Citrate

Glycerin

Propanediol

1,2-Hexanediol

Lactic Acid

Alcohol Denat.

Xanthan Gum

Butylene Glycol

Salicylic Acid

Sodium Hyaluronate

Ethylhexylglycerin

Tocopherol

Water, Glycolic Acid, Sodium Citrate, Glycerin, Propanediol, 1,2-Hexanediol, Lactic Acid, Alcohol Denat., Xanthan Gum, Butylene Glycol, Salicylic Acid, Sodium Hyaluronate, Ethylhexylglycerin, Tocopherol

Caprylic/Capric Triglyceride

Sodium Hydroxide

Beheneth-5

Dimethicone

Neopentyl Glycol Dicaprylate/Dicaprate

Polyglyceryl-3 Stearate

Behenyl Alcohol

Undecane

Arachidyl Alcohol

Stearyl Alcohol

Cetyl Alcohol

Phospholipids

Allantoin

Tocopheryl Acetate

Chamomilla Recutita Flower Extract

Helianthus Annuus Seed Oil

Bisabolol

Arctium Lappa Seed Oil

Dipotassium Glycyrrhizate

Panthenol

Sodium Acrylates Copolymer

Tridecane

Hydrogenated Polydecene

Sclerotium Gum

Polyglyceryl-10 Stearate

Disodium EDTA

Chlorphenesin

Benzoic Acid

Sorbic Acid

Phenoxyethanol

Water, Glycolic Acid, Caprylic/Capric Triglyceride, Glycerin, Sodium Hydroxide, Beheneth-5, Dimethicone, Neopentyl Glycol Dicaprylate/Dicaprate, Polyglyceryl-3 Stearate, Behenyl Alcohol, Undecane, Arachidyl Alcohol, Stearyl Alcohol, Cetyl Alcohol, Phospholipids, Allantoin, Tocopheryl Acetate, Chamomilla Recutita Flower Extract, Helianthus Annuus Seed Oil, Bisabolol, Arctium Lappa Seed Oil, Dipotassium Glycyrrhizate, Panthenol, Sodium Acrylates Copolymer, Tridecane, Hydrogenated Polydecene, Sclerotium Gum, Polyglyceryl-10 Stearate, Disodium EDTA, Tocopherol, Chlorphenesin, Benzoic Acid, Sorbic Acid, Ethylhexylglycerin, 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.

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.

Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.

Topically, glycerin does several things at once:

Your 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.

Aquaporin-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.

This 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.

Just know very high concentrations (>40%) can feel tacky in low humidity.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

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:

Tocopherol is a fat-soluble antioxidant known as Vitamin E.

You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells.

Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.

It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks.

This ingredient is especially loved for being a team player. When combined with Vitamin C, the photoprotective effect of both ingredients roughly doubles and the combo also helps reduce UV-induced DNA damage.

This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.

In formulations, it also serves as a stabilizer that helps protect other oxidation-prone ingredients from degrading.

Concentrations usually range from 0.1-1% in most leave-on products.

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