@carolinednl_: 14 days. One strip a day. 👀✨ My 14-day hair journey with ESTHER FORMULA Biotin Strips 💗 Biotin (Vitamin B7) supports keratin production and healthy-looking hair, skin & nails : all in a fast-dissolving oral strip with no water needed. DAY 1 → DAY 14 👀 What do you think of the difference? @ESTHER FORMULA USA @estherformula_global #ESTHERFORMULA #BiotinStrips #Biotin #HairCare #estherbiotin