{"title":"Drunk Elephant C-Firma Fresh Vitamin-C Day Serum","entity_type":"Product","slug":"drunk-elephant-c-firma-fresh-vitamin-c-day-serum","canonical_url":"https://skinknowledgebase.com/products/drunk-elephant-c-firma-fresh-vitamin-c-day-serum","dates":{"date_modified":"2026-05-19","date_reviewed":"2026-05-19"},"mcp_eligible":true,"summary":"Drunk Elephant C-Firma Fresh Vitamin-C Day Serum is a 28 ml fresh-mix formula with L-ascorbic acid, ferulic acid, tocopherol, glycerin, and licorice extract.","evidence_sources":[{"title":"PubMed — Vitamin C in dermatology","canonical_citation_url":"https://skinknowledgebase.com/sources/telang-2013-vitamin-c-dermatology","original_source_url":"https://pubmed.ncbi.nlm.nih.gov/23741676/","source_type":"other"},{"title":"Ferulic acid stabilizes a solution of vitamins C and E and doubles its photoprotection of skin","canonical_citation_url":"https://skinknowledgebase.com/sources/lin-2005-ferulic-acid-vitamin-c-e-photoprotection","original_source_url":"https://pubmed.ncbi.nlm.nih.gov/16185284/","source_type":"peer_reviewed"},{"title":"Topical antioxidant solution with vitamins C and E stabilized by ferulic acid","canonical_citation_url":"https://skinknowledgebase.com/sources/lin-2008-topical-antioxidant-solution-uv-protection","original_source_url":"https://pubmed.ncbi.nlm.nih.gov/18603326/","source_type":"peer_reviewed"}],"product_fact_sources":[{"title":"Official Product Page — Drunk Elephant C-Firma Fresh Vitamin-C Day Serum","canonical_citation_url":"https://skinknowledgebase.com/sources/official-product-page-drunk-elephant-c-firma-fresh-vitamin-c-day-serum","original_source_url":"https://www.drunkelephant.com/collections/serums/c-firma-fresh-vitamin-c-day-serum-812343034358.html","source_type":"official_product_page"},{"title":"Dermstore Product Page — SkinCeuticals C E Ferulic","canonical_citation_url":"https://skinknowledgebase.com/sources/dermstore-product-page-skinceuticals-c-e-ferulic","original_source_url":"https://www.dermstore.com/p/skinceuticals-c-e-ferulic-with-15-l-ascorbic-acid-vitamin-c-serum-30ml/11289609/","source_type":"official_product_page"},{"title":"Bluemercury Product Page — SkinCeuticals C E Ferulic","canonical_citation_url":"https://skinknowledgebase.com/sources/bluemercury-product-page-skinceuticals-c-e-ferulic","original_source_url":"https://bluemercury.com/products/skinceuticals-c-e-ferulic","source_type":"official_product_page"}],"related_entities":[{"title":"PubMed — Vitamin C in dermatology","url":"https://skinknowledgebase.com/sources/telang-2013-vitamin-c-dermatology"},{"title":"Ferulic acid stabilizes a solution of vitamins C and E and doubles its photoprotection of skin","url":"https://skinknowledgebase.com/sources/lin-2005-ferulic-acid-vitamin-c-e-photoprotection"},{"title":"Topical antioxidant solution with vitamins C and E stabilized by ferulic acid","url":"https://skinknowledgebase.com/sources/lin-2008-topical-antioxidant-solution-uv-protection"},{"title":"Official Product Page — Drunk Elephant C-Firma Fresh Vitamin-C Day Serum","url":"https://skinknowledgebase.com/sources/official-product-page-drunk-elephant-c-firma-fresh-vitamin-c-day-serum"},{"title":"Dermstore Product Page — SkinCeuticals C E Ferulic","url":"https://skinknowledgebase.com/sources/dermstore-product-page-skinceuticals-c-e-ferulic"},{"title":"Bluemercury Product Page — SkinCeuticals C E Ferulic","url":"https://skinknowledgebase.com/sources/bluemercury-product-page-skinceuticals-c-e-ferulic"},{"title":"Dullness","url":"https://skinknowledgebase.com/concerns/dullness"},{"title":"Facial Hyperpigmentation","url":"https://skinknowledgebase.com/concerns/facial-hyperpigmentation"},{"title":"Dark Spots From Acne","url":"https://skinknowledgebase.com/concerns/dark-spots-from-acne"},{"title":"Vitamin C","url":"https://skinknowledgebase.com/ingredients/vitamin-c"},{"title":"Ferulic Acid","url":"https://skinknowledgebase.com/ingredients/ferulic-acid"},{"title":"Vitamin E","url":"https://skinknowledgebase.com/ingredients/vitamin-e"},{"title":"Is Drunk Elephant C-Firma Fresh Day Serum worth the price?","url":"https://skinknowledgebase.com/questions/is-drunk-elephant-c-firma-fresh-day-serum-any-good"}],"body_sections":[{"heading":"Quick Summary","paragraphs":["Drunk Elephant C-Firma Fresh Vitamin-C Day Serum is a $79 / 28 ml fresh-mix day serum with 15% L-ascorbic acid, 0.5% ferulic acid, 1.0% tocopherol, glycerin, licorice root, and sodium hyaluronate forms."]},{"heading":"Compact Product Facts","paragraphs":["- Brand: Drunk Elephant\n- Product line: Drunk Elephant Serums\n- Full product name: Drunk Elephant C-Firma Fresh Vitamin-C Day Serum\n- Cost: {\"currency\":\"USD\",\"checked_at\":\"2026-05-19\",\"single_unit\":79}\n- Retail URL: https://www.drunkelephant.com/collections/serums/c-firma-fresh-vitamin-c-day-serum-812343034358.html"]},{"heading":"Factual Description","paragraphs":["The official Drunk Elephant page identifies the product as C-Firma Fresh Vitamin-C Day Serum and describes a brightening, firming 15% vitamin C serum designed to be mixed before first use. The page lists 15% L-ascorbic acid, 0.5% ferulic acid, 1.0% tocopherol, pH 2.5, and morning use. The INCI begins with water, dimethyl isosorbide, ascorbic acid, laureth-23, glycerin, tocopherol, pumpkin ferment extract, marula oil, licorice root, grape juice extract, ferulic acid, emblica fruit extract, green tea leaf extract, pomegranate ferment, sodium hyaluronate forms, and rice bran extract."]}],"main_concern":{"title":"Dullness","url":"https://skinknowledgebase.com/concerns/dullness"},"key_ingredients":[{"title":"Vitamin C","url":"https://skinknowledgebase.com/ingredients/vitamin-c"},{"title":"Ferulic Acid","url":"https://skinknowledgebase.com/ingredients/ferulic-acid"},{"title":"Vitamin E","url":"https://skinknowledgebase.com/ingredients/vitamin-e"}],"cost":{"currency":"USD","checked_at":"2026-05-19","single_unit":79},"retail_url":"https://www.drunkelephant.com/collections/serums/c-firma-fresh-vitamin-c-day-serum-812343034358.html"}