RT Journal Article T1 Vitamin C and folate status in hereditary fructose intolerance. A1 Cano, Ainara A1 Alcalde, Carlos A1 Belanger-Quintana, Amaya A1 Cañedo-Villarroya, Elvira A1 Ceberio, Leticia A1 Chumillas-Calzada, Silvia A1 Correcher, Patricia A1 Couce, María Luz A1 Garcia-Arenas, Dolores A1 Gomez, Igor A1 Hernandez, Tomas A1 Izquierdo-Garcia, Elsa A1 Martinez-Chicano, Damaris A1 Morales, Montserrat A1 Pedron-Giner, Consuelo A1 Jauregui, Estrella Petrina A1 Peña-Quintana, Luis A1 Sanchez-Pintos, Paula A1 Serrano-Nieto, Juliana A1 Unceta-Suarez, Maria A1 Miñana, Isidro Vitoria A1 de-Las-Heras, Javier K1 Fructose Intolerance K1 Fructose K1 Dietary Supplements K1 Vitamin A K1 Folic Acid Deficiency AB Hereditary fructose intolerance (HFI) is a rare inborn error of fructose metabolism caused by the deficiency of aldolase B. Since treatment consists of a fructose-, sucrose- and sorbitol-restrictive diet for life, patients are at risk of presenting vitamin deficiencies. Although there is no published data on the status of these vitamins in HFI patients, supplementation with vitamin C and folic acid is common. Therefore, the aim of this study was to assess vitamin C and folate status and supplementation practices in a nationwide cohort of HFI patients. Vitamin C and folic acid dietary intake, supplementation and circulating levels were assessed in 32 HFI patients and 32 age- and sex-matched healthy controls. Most of the HFI participants presented vitamin C (96.7%) and folate (90%) dietary intake below the recommended population reference intake. Up to 69% received vitamin C and 50% folic acid supplementation. Among HFI patients, 15.6% presented vitamin C and 3.1% folate deficiency. The amount of vitamin C supplementation and plasma levels correlated positively (R = 0.443; p = 0.011). Interestingly, a higher percentage of non-supplemented HFI patients were vitamin C deficient when compared to supplemented HFI patients (30% vs. 9.1%; p = 0.01) and to healthy controls (30% vs. 3.1%; p  Our results provide evidence for the first time supporting vitamin C supplementation in HFI. There is great heterogeneity in vitamin supplementation practices and, despite follow-up at specialised centres, vitamin C deficiency is common. Further research is warranted to establish optimal doses of vitamin C and the need for folic acid supplementation in HFI. PB Nature Publishing Group YR 2022 FD 2022-07-19 LK http://hdl.handle.net/10668/19533 UL http://hdl.handle.net/10668/19533 LA en NO Cano A, Alcalde C, Belanger-Quintana A, Cañedo-Villarroya E, Ceberio L, Chumillas-Calzada S, et al. Vitamin C and folate status in hereditary fructose intolerance. Eur J Clin Nutr. 2022 Dec;76(12):1733-1739. doi: 10.1038/s41430-022-01178-3. Epub 2022 Jul 19. Erratum in: Eur J Clin Nutr. 2023 Nov;77(11):1102-1103 DS RISalud RD Aug 4, 2025