Biossance Squalane + Vitamin C Rose Oil Versus Sunday Riley C.E.O Glow Vitamin C + Turmeric Face Oil

Biossance Squalane + Vitamin C Rose Oil Versus Sunday Riley C.E.O Glow Vitamin C + Turmeric Face Oil

This brightening oil is formulated around Squalane and Tetrahexyldecyl Ascorbate to brighten dull-looking skin and hydrate skin.

This brightening oil is formulated around Tetrahexyldecyl Ascorbate to brighten dull-looking skin.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Squalane

Tetrahexyldecyl Ascorbate

Caprylic/Capric Triglyceride

Pistacia Lentiscus Gum

Rosa Damascena Flower Extract

Geraniol

Citronellol

Squalane, Tetrahexyldecyl Ascorbate, Caprylic/Capric Triglyceride, Pistacia Lentiscus Gum, Rosa Damascena Flower Extract, Geraniol, Citronellol

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

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

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.

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:

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