Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

No7 Radiance+ 15% Vitamin C Serum Versus Obagi Professional-C Serum 20%

No7 Radiance+ 15% Vitamin C Serum Versus Obagi Professional-C Serum 20% Detailed comparison of No7 Radiance+ 15% Vitamin C Serum versus Obagi Professional-C Serum 20%. This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid to brighten dull-looking

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No7 Radiance+ 15% Vitamin C Serum Versus Obagi Professional-C Serum 20% Detailed comparison of No7 Radiance+ 15% Vitamin C Serum versus Obagi Professional-C Serum 20%. This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid to brighten dull-looking skin and fade the look of dark spots. This brightening serum is formulated around Ascorbic Acid and Ascorbyl Glucoside to brighten dull-looking skin and soften the look of wrinkles. Water 3-O-Ethyl Ascorbic Acid Propylene Glycol Polysorbate 20 Polyacrylate Crosspolymer-6 Ethylhexylglycerin Sodium Hyaluronate Benzyl Alcohol Allantoin Xanthan Gum PEG-40 Hydrogenated Castor Oil Sodium Citrate Limonene Dipropylene Glycol Linalool T-Butyl Alcohol Parfum Citric Acid Denatonium Benzoate Water, 3-O-Ethyl Ascorbic Acid, Propylene Glycol, Polysorbate 20, Polyacrylate Crosspolymer-6, Ethylhexylglycerin, Sodium Hyaluronate, Benzyl Alcohol, Allantoin, Xanthan Gum, PEG-40 Hydrogenated Castor Oil, Sodium Citrate, Limonene, Dipropylene Glycol, Linalool, T-Butyl Alcohol, Parfum, Citric Acid, Denatonium Benzoate Ascorbic Acid Alcohol Ascorbyl Glucoside Ethoxydiglycol Phenoxyethanol Sorbitol Zinc Chloride Calcium Hydroxide Propylene Glycol, Water, Ascorbic Acid, Alcohol, Ascorbyl Glucoside, Ethoxydiglycol, Phenoxyethanol, Sorbitol, Sodium Hyaluronate, Zinc Chloride, Calcium Hydroxide, Parfum Be the first to review These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Parfum is a catch-all term for an ingredient or more that is used to give a scent to products. Also called "fragrance", this ingredient can be a blend of hundreds of chemicals or plant oils. This means every product with "fragrance" or "parfum" in the ingredients list is a different mixture. For instance, Habanolide is a proprietary trade name for a specific aroma chemical. When used as a fragrance ingredient in cosmetics, most aroma chemicals fall under the broad labeling category of “FRAGRANCE” or “PARFUM” according to EU and US regulations. The term 'parfum' or 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance by INCI standards. One example is Calendula flower extract. Calendula is an essential oil that still imparts a scent or 'fragrance'. Depending on the blend, the ingredients in the mixture can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol. Parfum can also be used to mask or cover an unpleasant scent. The bottom line is: not all fragrances/parfum/ingredients are created equally. If you are worried about fragrances, we recommend taking a closer look at an ingredient. And of course, we always recommend speaking with a professional. Propylene Glycol is a synthetic, colorless, odorless liquid that has been a staple in cosmetics for decades. It is a skin conditioning agent, humectant, and solvent. As a humectant, it draw water to the skin to reduce flaking and restore suppleness. It's also a solvent that helps dissolve other actives and keeps formulas stable across temperature changes. The CIR Expert Panel has confirmed this ingredient to be nontoxic and clinical studies show no sensitization at cosmetic use concentrations. True allergic reactions are quite rare: a 15-year retrospective study of 6,751 patients found only 0.31% had a positive reaction (and less than half were considered clinically relevant). It seemed that when sensitization does occur, it's most commonly linked to topical medication (like corticosteroids) and not cosmetics. Allergic contact dermatitis also appears largely limited to individuals with underlying skin conditions. Overall, propylene glycol is a well-studied ingredient that most people can tolerate without issue. 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. I