Dr. Dennis Gross Skincare C+ Collagen Brighten & Firm Vitamin C Serum Versus Sunday Riley C.E.O Glow Vitamin C + Turmeric Face Oil
Dr. Dennis Gross Skincare C+ Collagen Brighten & Firm Vitamin C Serum Versus Sunday Riley C.E.O Glow Vitamin C + Turmeric Face Oil This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Niacinamide to brighten dull-looking skin and soften the
Dr. Dennis Gross Skincare C+ Collagen Brighten & Firm Vitamin C Serum Versus Sunday Riley C.E.O Glow Vitamin C + Turmeric Face Oil
This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Niacinamide to brighten dull-looking skin and soften the look of wrinkles.
This brightening oil is formulated around Tetrahexyldecyl Ascorbate to brighten dull-looking skin.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Glycerin
3-O-Ethyl Ascorbic Acid
Niacinamide
Glycereth-7 Triacetate
Lactic Acid
Sd Alcohol 40-B
Hydroxyethylcellulose
Dimethyl Isosorbide
Ascorbic Acid
Collagen Amino Acids
Superoxide Dismutase
Glycine
Carnitine Hcl
Ubiquinone
Hexylresorcinol
Emblica Officinalis Fruit Extract
Hydrolyzed Soy Protein
Tetrahexyldecyl Ascorbate
Isoquercetin
Mandelic Acid
Pueraria Lobata Root Extract
Curcuma Longa Root Extract
Phytic Acid
Citric Acid
Tetrasodium EDTA
Sodium Citrate
Butylene Glycol
Xanthan Gum
Polysorbate 20
T-Butyl Alcohol
Sodium Hydroxide
Polysorbate 80
Denatonium Benzoate
Benzyl Alcohol
Phenoxyethanol
Sodium Benzoate
Potassium Sorbate
Water, Glycerin, 3-O-Ethyl Ascorbic Acid, Niacinamide, Glycereth-7 Triacetate, Lactic Acid, Sd Alcohol 40-B, Hydroxyethylcellulose, Dimethyl Isosorbide, Ascorbic Acid, Collagen Amino Acids, Superoxide Dismutase, Glycine, Carnitine Hcl, Ubiquinone, Hexylresorcinol, Emblica Officinalis Fruit Extract, Hydrolyzed Soy Protein, Tetrahexyldecyl Ascorbate, Isoquercetin, Mandelic Acid, Pueraria Lobata Root Extract, Curcuma Longa Root Extract, Phytic Acid, Citric Acid, Tetrasodium EDTA, Sodium Citrate, Butylene Glycol, Xanthan Gum, Polysorbate 20, T-Butyl Alcohol, Sodium Hydroxide, Polysorbate 80, Denatonium Benzoate, Benzyl Alcohol, Phenoxyethanol, Sodium Benzoate, Potassium Sorbate
Rubus Idaeus Seed Oil
Neopentyl Glycol Diethylhexanoate
Caprylyl Caprylate/Caprate
Simmondsia Chinensis Seed Oil
Cucumis Sativus Seed Oil
Punica Granatum Seed Oil
Vaccinium Macrocarpon Seed Oil
Oenothera Biennis Oil
Octyldodecanol
Helianthus Annuus Seed Oil Unsaponifiables
Citrus Aurantium Amara Flower Oil
Melia Azadirachta Leaf Extract
Eclipta Prostrata Extract
Moringa Oleifera Seed Oil
Tocopherol
Helianthus Annuus Seed Oil
Pentylene Glycol
4-T-Butylcyclohexanol
Ribes Nigrum Seed Oil
Bisabolol
Cetylhydroxyproline Palmitamide
Hexyldecanol
Hydroxyphenyl Propamidobenzoic Acid
Stearic Acid
Brassica Campestris Sterols
Cardiospermum Halicacabum Flower/Leaf/Vine Extract
Zingiber Officinale Root Extract
Rosmarinus Officinalis Leaf Extract
Rubus Idaeus Seed Oil, Neopentyl Glycol Diethylhexanoate, Caprylyl Caprylate/Caprate, Simmondsia Chinensis Seed Oil, Cucumis Sativus Seed Oil, Punica Granatum Seed Oil, Vaccinium Macrocarpon Seed Oil, Oenothera Biennis Oil, Octyldodecanol, Tetrahexyldecyl Ascorbate, Curcuma Longa Root Extract, Helianthus Annuus Seed Oil Unsaponifiables, Citrus Aurantium Amara Flower Oil, Melia Azadirachta Leaf Extract, Eclipta Prostrata Extract, Moringa Oleifera Seed Oil, Tocopherol, Helianthus Annuus Seed Oil, Pentylene Glycol, 4-T-Butylcyclohexanol, Ribes Nigrum Seed Oil, Bisabolol, Cetylhydroxyproline Palmitamide, Hexyldecanol, Hydroxyphenyl Propamidobenzoic Acid, Stearic Acid, Brassica Campestris Sterols, Cardiospermum Halicacabum Flower/Leaf/Vine Extract, Zingiber Officinale Root Extract, Rosmarinus Officinalis Leaf Extract
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Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Curcuma Longa Root Extract comes from the rhizome (underground stem) of the turmeric plant.
While the official EU Cosing Database lists this ingredient as a fragrance, it actually does more than give products a scent.
This ingredient contains a group of yellow pigments called curcuminoids (mostly curcumin) that give it genuine antioxidant and anti-inflammatory activity in skin.
Reviews of topical clinical studies have found turmeric/curcumin to be generally well-tolerated and useful across conditions like eczema and mild inflammation.
One thing working in its favor is that curcumin barely penetrates; in lab skin-permeation testing, the curcuminoids mostly stayed in the outermost layer of skin. This is a good thing because its soothing and antioxidant activity is a surface-level job anyway.
At this time, industry data shows there's no single "correct" cosmetic percentage. It's used across a wide range depending on the product and varies from tiny fractions of a percent up to a few percent.
Allergy-wise, curcumin is a documented (but uncommon) contact allergen. It can also cross react with related plants, so anyone with a turmeric/ginger/cinnamon allergy or reactive skin should patch test first.
Tetrahexyldecyl Ascorbate (THD) is a stable and oil-soluble form of Vitamin C.
THD is special in that it has the ability to travel deeper into skin than traditional ascorbic acid while maintaining the same skin benefits (double win!).
Because it’s oil-soluble, THD dives deep into your skin’s fatty layers (think ceramides and cholesterol) to fight off the kind of free radicals that mess with your skin barrier. This makes it a great pair with water-based vitamin C (ascorbic acid) that mainly works on the surface.
Even at just 0.1%, THD is already showing great antioxidant activity. When used up to 2%, it helps keep your skin happy and calm, especially when it’s stressed from pollution or sun.
Want to fade dark spots or tackle hyperpigmentation? You’ll want 5% or more. Pairing it with brightening buddies like niacinamide or licorice root gives even better results. One study even used 30% THD with other brighteners and saw real results on stubborn discoloration, even in melasma-prone skin.
A note on THD: It’s has a slightly silky, oily texture and usually shows up colorless or pale yellow (though the exact shade can vary by supplier).
While you can sneak it into water-based formulas, it really shines when paired with silicones or oils, which help your skin soak it up better.
THD is pretty stable, but it’s still vulnerable to degradation like ascorbic acid. Too much light or heat (above 113°F / 45°C) can break it down over time. Go for dark and opaque packaging that keeps it safe and shady!
Read more about other types of Vitamin C: