A Japanese study by M.P. Kapoor, A. Abe et al titled “ Dietary intervention of prebiotic partially hydrolyzed guar gum improves skin viscoelasticity, stratum corneum hydration, and ‍reduction of trans-epidermal water loss ” published in January 2025 has found that prebiotic dietary fiber intake improves the skin. The paper is about 20 pages, including acknowledgements and references. The motivation for the study is to support the hypothesis and previous studies that prebiotic