Original ResearchPublished 1 October 2026Oil palm fiber extract as a fermentable functional ingredient: in vitro gastrointestinal carbohydrate hydrolysis, feline fecal fermentation, and microbiota-associated metabolite productionKristina Dea Ivanalie · Uchenna Kalu Akpi · Yada Duangnumsawang · Chutha Takahashi Yupanqui · Santad WichienchotFrontiers in Food Science and Technologydoi 10.3389/frfst.2026.1931174