ZO Skin Health Exfoliating Polish Versus The Ordinary Niacinamide 10% + Zinc 1%

ZO Skin Health Exfoliating Polish Versus The Ordinary Niacinamide 10% + Zinc 1%

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

This oil-control serum is formulated around Niacinamide and Zinc PCA to balance excess oil and refine the look of pores.

What's inside

Key Ingredients

Benefits

Concerns

No concerns

Ingredients Side-by-side

PEG-8

Sodium Bicarbonate

Magnesium Oxide

Ethoxydiglycol

Glycerin

Butylene Glycol

Oleth-20

Trihydroxystearin

Glyceryl Stearate

PEG-100 Stearate

Paraffinum Liquidum

Water

Tocopheryl Acetate

Melaleuca Alternifolia Leaf Oil

Glycine Soja Sterols

Parfum

Limonene

Linalool

Ascorbyl Palmitate

Retinyl Palmitate

Stearyl Glycyrrhetinate

Tetrahexyldecyl Ascorbate

Caprylic/Capric Triglyceride

Linoleic Acid

Phospholipids

Phenoxyethanol

CI 61565

PEG-8, Sodium Bicarbonate, Magnesium Oxide, Ethoxydiglycol, Glycerin, Butylene Glycol, Oleth-20, Trihydroxystearin, Glyceryl Stearate, PEG-100 Stearate, Paraffinum Liquidum, Water, Tocopheryl Acetate, Melaleuca Alternifolia Leaf Oil, Glycine Soja Sterols, Parfum, Limonene, Linalool, Ascorbyl Palmitate, Retinyl Palmitate, Stearyl Glycyrrhetinate, Tetrahexyldecyl Ascorbate, Caprylic/Capric Triglyceride, Linoleic Acid, Phospholipids, Phenoxyethanol, CI 61565

Niacinamide 10%

Pentylene Glycol

Zinc PCA 1%

Dimethyl Isosorbide

Tamarindus Indica Seed Gum

Xanthan Gum

Isoceteth-20

Chlorphenesin

Water, Niacinamide 10%, Pentylene Glycol, Zinc PCA 1%, Dimethyl Isosorbide, Tamarindus Indica Seed Gum, Xanthan Gum, Isoceteth-20, Ethoxydiglycol, Phenoxyethanol, Chlorphenesin

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.

Ethoxydiglycol (aka Diethylene Glycol Monoethyl Ether) is one of the cosmetic world's quiet problem solvers.

In a formula, it is a solvent that dissolves tricky ingredients that don't want to mix in and helps spread ingredients evenly across your skin without leaving a greasy or sticky feeling

This makes it great for hard-to-dissolve actives like vitamin C, benzoyl peroxide, and self-tanner DHA.

It also has mild humectant and penetration enhancer abilities so it can help some actives absorb a little deeper.

The penetration boost is backed by lab research: studies using human skin samples found it improved how well an active dissolves into the upper layer of skin rather than tearing down your skin barrier. Reviews of its mechanism also describe it interacting gently with the lipids and water in your outermost layer of skin.

Just know this penetration-enhancing effect is not universal. It helps a lot in some formulas and did very little in others (so the benefit really depends on the specific product).

Safety-wise, the evidence is reassuring. The Cosmetic Ingredient Review Expert Panel reviewed it and concluded it's safe for use in cosmetics and recognized it as non-irritating, non-sensitizing, and non-comedogenic in skincare.

Typical leave-on skincare usage lands around 1-10%. The EU has sets caps of 2.6% in non-spray products, 10% in rinse-offs, 7% in oxidative hair dye, and 5% in non-oxidative hair dye.

Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).

It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.

On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.

Another perk of this ingredient is that it stays functional across a wide pH range (3-10).

You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.

Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.

Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.

Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.

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!

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