Vichy Liftactiv Peptide-C Sunscreen SPF 30 Versus La Roche-Posay Anthelios AOX Daily Antioxidant Serum SPF 50

Vichy Liftactiv Peptide-C Sunscreen SPF 30 Versus La Roche-Posay Anthelios AOX Daily Antioxidant Serum SPF 50 Detailed comparison of Vichy Liftactiv Peptide-C Sunscreen SPF 30 versus La Roche-Posay Anthelios AOX Daily Antioxidant Serum SPF 50. This chemical sunscreen covers most of the UV range, lighter on the deep UVA that drives aging. Butyl Methoxydibenzoylmethane 3% Homosalate 5% Ethylhexyl Salicylate 5% Octocrylene 7% Water Glycerin Dimethicone Silica PEG-100 Stearate Glyceryl Stearate Glycolic Acid Stearic Acid Dicaprylyl Carbonate Steareth-100 Dimethicone/Vinyl Dimethicone Crosspolymer Sodium Hydroxide Sodium Hyaluronate Myristic Acid Cyclodextrin Palmitic Acid Phenoxyethanol Phenylethyl Resorcinol Guanosine Ammonium Polyacryloyldimethyl Taurate Ascorbyl Glucoside Tocopherol Caprylyl Glycol Trisodium Ethylenediamine Disuccinate Xanthan Gum Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate Pisum Sativum Extract Parfum Butyl Methoxydibenzoylmethane 3%, Homosalate 5%, Ethylhexyl Salicylate 5%, Octocrylene 7%, Water, Glycerin, Dimethicone, Silica, PEG-100 Stearate, Glyceryl Stearate, Glycolic Acid, Stearic Acid, Dicaprylyl Carbonate, Steareth-100, Dimethicone/Vinyl Dimethicone Crosspolymer, Sodium Hydroxide, Sodium Hyaluronate, Myristic Acid, Cyclodextrin, Palmitic Acid, Phenoxyethanol, Phenylethyl Resorcinol, Guanosine, Ammonium Polyacryloyldimethyl Taurate, Ascorbyl Glucoside, Tocopherol, Caprylyl Glycol, Trisodium Ethylenediamine Disuccinate, Xanthan Gum, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Pisum Sativum Extract, Parfum Butyl Methoxydibenzoylmethane 2.68% Homosalate 9.6% Ethylhexyl Salicylate 2.88% Octocrylene 5.38% Benzophenone-3 3.46% Cyclopentasiloxane Acrylates/Dimethicone Copolymer Propylene Glycol Sodium Polyacrylate Scutellaria Baicalensis Root Extract Acrylates/C10-30 Alkyl Acrylate Crosspolymer Disodium EDTA Diethylhexyl Syringylidenemalonate Polyacrylamide C13-14 Isoparaffin Laureth-7 Cassia Alata Leaf Extract Maltodextrin Triethanolamine Butyl Methoxydibenzoylmethane 2.68%, Homosalate 9.6%, Ethylhexyl Salicylate 2.88%, Octocrylene 5.38%, Benzophenone-3 3.46%, Water, Dimethicone, Cyclopentasiloxane, Tocopherol, Acrylates/Dimethicone Copolymer, Phenoxyethanol, Propylene Glycol, Caprylyl Glycol, Silica, Sodium Polyacrylate, Ascorbyl Glucoside, Scutellaria Baicalensis Root Extract, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Disodium EDTA, Diethylhexyl Syringylidenemalonate, Polyacrylamide, C13-14 Isoparaffin, Laureth-7, Cassia Alata Leaf Extract, Maltodextrin, Triethanolamine 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. Ascorbyl Glucoside (AA-2G) is one of the most stable vitamin C derivatives out there. It's made by attaching a glucose molecule to ascorbic acid; this glucose "cap" shields the vitamin C from air, light, heat, and metal ions that normally cause pure ascorbic acid to oxidize. Once on your skin, the enzyme alpha-glucosidase snips off the glucose and gradually releases active ascorbic acid right where it's needed. Basically, it behaves like a slow-release pro-vitamin C with less of a stinging that high-strength ascorbic acid can cause. The research supports the classic vitamin C benefits as well. In lab and human studies, AA-2G slowed down the skin's production of melanin (the pigment behind dark spots) and helped shield skin cells against sun damage better than ascorbyl phosphate. These studies also showed AA-2G released vitamin C over a longer period. A frequently cited manufacturer trial found that a 2% AA-2G face cream significantly improved wrinkle depth and skin roughness after 45 days. And in 2009, a clinical trial showed it meaningfully lightened dark patches on the gums compared to a placebo. There's also collagen-synthesis support (since vitamin C is a required cofactor for that) and an antioxidant effect too. Typical usage is usually between 0.5-5% and most studies/products land around 2%. AA-2G performs best when formulated at a mildly acidic pH (~5-7) which is much gentler than the pH that pure vitamin C demands (~2.5-3.5). Just one thing worth knowing: the in-skin conversation rate is only about 55-60% by weight. So a 5% AA-2G product delivers roughly 2.75-3% of actual active vitamin C. On top of that, skin absorption is relatively low because the ingredient is water-soluble. Also known as Avobenzone, this ingredient is an oil-soluble used to absorb the full spectrum of UVA rays (peak 357 nm). It's one of the most effective UVA filters available but has a major caveat of photostability: avobenzone is susceptible to photodegradation. This means it can lose efficacy when exposed to sunlight without the help of a stabilizing agent. Studies show antioxidants (like vitamin E or vitamin C) and some UV filters (like octocrylene and Tinosorb S) can meaningfully improve its stability in a formulation. The maximum allowable concentration according to regulation is 3% in the US + Canada, and 5% in the EU, Australia, China, Korea, and ASEAN countries. It has a well-support safety profile: a comprehensive 2025 review found minimal toxicity with no evidence of carcinogenicity. Overall, avobenzone is a safe and regulated ingredient used in sunscreen for over 40 years. Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created. Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin. Because it is