Dr. Loretta Anti-Aging Repair Serum Versus Obagi Professional-C Serum 20%

Dr. Loretta Anti-Aging Repair Serum Versus Obagi Professional-C Serum 20%

This barrier-repair serum is formulated around Tetrahexyldecyl Ascorbate and Bisabolol to strengthen the skin barrier.

This brightening serum is formulated around Ascorbic Acid and Ascorbyl Glucoside to brighten dull-looking skin and soften the look of wrinkles.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Glycerin

Tetrahexyldecyl Ascorbate

Caprylic/Capric Triglyceride

Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

Caprylyl Glycol

Hydrogenated Lecithin

Dimethicone

Cyclopentasiloxane

Maltodextrin

Phenoxyethanol

Hexylene Glycol

Bisabolol

Tocopheryl Acetate

Citrus Aurantium Dulcis Peel Oil

Citrus Limon Peel Oil

Microcrystalline Cellulose

Sodium Acrylates Copolymer

Alaria Esculenta Extract

Syringa Vulgaris Leaf Cell Culture Extract

Hydrogenated Polydecene

Undaria Pinnatifida Extract

Phospholipids

Helianthus Annuus Seed Oil

Polyglyceryl-10 Stearate

Cellulose Gum

Sodium Hyaluronate

Water, Glycerin, Tetrahexyldecyl Ascorbate, Caprylic/Capric Triglyceride, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Caprylyl Glycol, Hydrogenated Lecithin, Dimethicone, Cyclopentasiloxane, Maltodextrin, Phenoxyethanol, Hexylene Glycol, Bisabolol, Tocopheryl Acetate, Citrus Aurantium Dulcis Peel Oil, Citrus Limon Peel Oil, Microcrystalline Cellulose, Sodium Acrylates Copolymer, Alaria Esculenta Extract, Syringa Vulgaris Leaf Cell Culture Extract, Hydrogenated Polydecene, Undaria Pinnatifida Extract, Phospholipids, Helianthus Annuus Seed Oil, Polyglyceryl-10 Stearate, Cellulose Gum, Sodium Hyaluronate

Propylene Glycol

Ascorbic Acid

Alcohol

Ascorbyl Glucoside

Ethoxydiglycol

Sorbitol

Zinc Chloride

Calcium Hydroxide

Parfum

Propylene Glycol, Water, Ascorbic Acid, Alcohol, Ascorbyl Glucoside, Ethoxydiglycol, Phenoxyethanol, Sorbitol, Sodium Hyaluronate, Zinc Chloride, Calcium Hydroxide, Parfum

Alternatives

Ingredients Explained

These ingredients are found in both products.

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

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.

Sodium Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity.

In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface.

Interestingly, the size of the molecule affects its behavior:

Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.

Many serums use a blend of both weights so you can get surface hydration plus longer-lasting and deeper effects.

You'll typically see concentrations between 0.1-2% for this ingredient.

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