--- description: Find out why Supergoop! Daily Dose Vitamin C + SPF 40 Serum is one of the best inventions of 2021 title: Supergoop! Daily Dose Vitamin C + SPF 40 Serum: The 100 Best Inventions of 2021 image: https://static.time.com/v3/assets/bltea6093859af6183b/blt3844987e44ea8b0a/698a1e8c4ee2620ae23197d6/best-inventions-2021-Daily-Dose-Vitamin-C-03.jpg?branch=production&width=3840&quality=75&auto=webp&crop=16:9 --- Nov 10, 2021 # Dual-Purpose Skin Care Supergoop! Daily Dose Vitamin C + SPF 40 Serum by [TIME Staff](/author/time-staff/) ## TIME Staff Update your preferences in [Account Settings](/account/preferences/) Close  Vitamin C skin-care products, which are proven to help fade dark spots and even out skin tone, are more popular than ever. But after surveying customers, Supergoop! founder Holly Thaggard found few users were aware that the active ingredients in vitamin C treatments are rendered ineffective by the sun and, as a result, need to be paired with an SPF. “We wanted to create a formula that could solve that problem in one fell swoop,” she says. Combining the two is harder than it sounds: both SPF and vitamin C require specific pH environments in order to stabilize, Thaggard explains, which makes them difficult to formulate together. Making the final result scentless and transparent also proved tricky. The [Daily Dose Vitamin C + SPF 40 Serum](https://supergoop.com/products/daily-dose-vitamin-c-serum-spf-40 "undefined") ($46) took more than three years and 15 iterations to perfect—but it’s since become the brand’s most successful direct-to-consumer product launch to date. _—Taylor Bryant_ **Buy Now:** [**Daily Dose Vitamin C + SPF 40 Serum**](https://supergoop.com/products/daily-dose-vitamin-c-serum-spf-40 "undefined") ```json [{"@context":"https://schema.org","@type":"Article","@id":"https://time.com/collections/best-inventions-2021/6112611/supergoop-daily-dose-vitamin-c-spf40-serum/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/collections/best-inventions-2021/6112611/supergoop-daily-dose-vitamin-c-spf40-serum/"},"headline":"Dual-Purpose Skin Care","datePublished":"2021-11-10T11:08:15.000Z","dateModified":"2026-03-02T23:55:25.785Z","description":"","url":"https://time.com/collections/best-inventions-2021/6112611/supergoop-daily-dose-vitamin-c-spf40-serum/","keywords":["list","franchise","best inventions","Best Inventions 2021"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt3844987e44ea8b0a/698a1e8c4ee2620ae23197d6/best-inventions-2021-Daily-Dose-Vitamin-C-03.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"TIME Staff","jobTitle":null,"url":"https://time.com/author/time-staff/"}],"creator":"TIME Staff","articleSection":"","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt3844987e44ea8b0a/698a1e8c4ee2620ae23197d6/best-inventions-2021-Daily-Dose-Vitamin-C-03.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https://time.com/collections/best-inventions-2021/6112611/supergoop-daily-dose-vitamin-c-spf40-serum/","name":"Dual-Purpose Skin Care"}}]}] ```