The Ordinary Niacinamide 10% + Zinc 1% Versus Skin Inc Hyaluronic Acid Serum

The Ordinary Niacinamide 10% + Zinc 1% Versus Skin Inc Hyaluronic Acid Serum

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

This hydrating serum is formulated around Sodium Hyaluronate and Hydrolyzed Hyaluronic Acid to hydrate skin and strengthen the skin barrier.

What's inside

Key Ingredients

Benefits

Concerns

No concerns

Ingredients Side-by-side

Water

Niacinamide 10%

Pentylene Glycol

Zinc PCA 1%

Dimethyl Isosorbide

Tamarindus Indica Seed Gum

Xanthan Gum

Isoceteth-20

Ethoxydiglycol

Phenoxyethanol

Chlorphenesin

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

Butylene Glycol

Glycerin

Sodium Hyaluronate

Hydrolyzed Hyaluronic Acid

Carbomer

Algin

Alcaligenes Polysaccharides

Polysorbate 80

Titanium Dioxide

Cobalt Aluminum Oxide

Potassium Hydroxide

Water, Butylene Glycol, Glycerin, Pentylene Glycol, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Carbomer, Algin, Alcaligenes Polysaccharides, Polysorbate 80, Titanium Dioxide, Cobalt Aluminum Oxide, Potassium Hydroxide, Phenoxyethanol

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Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Pentylene Glycol (1,2-pentanediol) is a multitasking little diol with three main roles in a formula:

Research on alkanediols (the family pentylene glycol belongs to) show they work by disrupting microbial cell membranes. This disruption helps the primary preservative system in a product work more effectively at lower doses.

On the safety side, the Cosmetic Ingredient Review Expert Panel has concluded this ingredient to be safe as used in current cosmetic practices + concentrations.

Typical use levels in a formula run about 1-5%.

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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