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Folate deficiency glossitis — Clinical Guidelines

Overview

Folate deficiency glossitis, also known as megaloblastic glossitis, is characterized by inflammation of the tongue due to insufficient folate (vitamin B9) intake or absorption, leading to impaired cell division and maturation, particularly in rapidly dividing tissues like those of the tongue 1 2 3 4 23.

Diagnosis

Clinical Presentation: Presence of a smooth, beefy red tongue with atrophy of papillae 1 23.

Laboratory Tests: Measure serum folate levels and red blood cell folate concentrations; elevated homocysteine levels can also indicate deficiency 1 11 26.

Grading: Typically assessed based on serum folate levels: <3 μg/L often indicates deficiency 1 9.

Management

Supplementation: Oral folic acid supplementation, typically starting at 1 mg daily for several months, then reducing to maintenance dose (0.4-1 mg/day) 2 23 28.

Dietary Changes: Encourage consumption of folate-rich foods such as leafy greens, legumes, and fortified cereals 1 5 25.

Monitoring: Regular follow-up to assess folate levels and clinical improvement 9 24.

Special Populations

Pregnancy: Mandatory folic acid fortification of staple foods recommended to prevent deficiency and associated risks like neural tube defects 10 20.

Elderly: Higher prevalence of folate deficiency; fortification of grain products may help maintain adequate status 24 31.

Comorbidities: Individuals with chronic diseases may require higher folate intake or supplementation due to increased demands 14 23.

Key Recommendations

Initiate Folic Acid Supplementation: For confirmed folate deficiency, start with 1 mg daily for several months, then adjust to maintenance dose (0.4-1 mg/day) 2 23 (Evidence: Strong).

Promote Dietary Folate Intake: Encourage consumption of folate-rich foods to support overall folate status 1 5 25 (Evidence: Moderate).

Fortify Staple Foods: Implement mandatory folic acid fortification in staple foods, particularly in populations at higher risk (e.g., pregnant women, elderly) 10 20 (Evidence: Moderate).

References

1 Ruggeri S, De Arcangelis E, Aguzzi A, Messia MC, Marconi E. Design of Cereal Products Naturally Enriched in Folate from Barley Pearling By-Products. Nutrients 2022. link 2 Naderi N, House JD. Recent Developments in Folate Nutrition. Advances in food and nutrition research 2018. link 3 Palchetti CZ, Paniz C, de Carli E, Marchioni DM, Colli C, Steluti J et al.. Association between Serum Unmetabolized Folic Acid Concentrations and Folic Acid from Fortified Foods. Journal of the American College of Nutrition 2017. link 4 Patel KR, Sobczyńska-Malefora A. The adverse effects of an excessive folic acid intake. European journal of clinical nutrition 2017. link 5 Dong W, Cheng ZJ, Lei CL, Wang XL, Wang JL, Wang J et al.. Overexpression of folate biosynthesis genes in rice (Oryza sativa L.) and evaluation of their impact on seed folate content. Plant foods for human nutrition (Dordrecht, Netherlands) 2014. link 6 De Steur H, Feng S, Xiaoping S, Gellynck X. Consumer preferences for micronutrient strategies in China. A comparison between folic acid supplementation and folate biofortification. Public health nutrition 2014. link 7 Castorena-Torres F, Ramos-Parra PA, Hernández-Méndez RV, Vargas-García A, García-Rivas G, de la Garza RI. Natural folates from biofortified tomato and synthetic 5-methyl-tetrahydrofolate display equivalent bioavailability in a murine model. Plant foods for human nutrition (Dordrecht, Netherlands) 2014. link 8 Wang X, Cabrera RM, Li Y, Miller DS, Finnell RH. Functional regulation of P-glycoprotein at the blood-brain barrier in proton-coupled folate transporter (PCFT) mutant mice. FASEB journal : official publication of the Federation of American Societies for Experimental Biology 2013. link 9 Metz J. Haematological implications of folate food fortification. South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde 2013. link 10 Maxwell SJ, Brameld KJ, Bower C, D'Antoine H, Hickling S, Marley J et al.. Baseline investigations of folate status in Aboriginal and non-Aboriginal West Australians prior to the introduction of mandatory fortification. The Australian & New Zealand journal of obstetrics & gynaecology 2013. link 11 Duncan TM, Reed MC, Nijhout HF. The relationship between intracellular and plasma levels of folate and metabolites in the methionine cycle: a model. Molecular nutrition & food research 2013. link 12 Swayne BG, Behan NA, Williams A, Stover PJ, Yauk CL, MacFarlane AJ. Supplemental dietary folic acid has no effect on chromosome damage in erythrocyte progenitor cells of mice. The Journal of nutrition 2012. link 13 Joish VN, Lin G, Lynen R. Healthcare-related characteristics of low vs normal folate levels among women of child-bearing age. Journal of medical economics 2012. link 14 Champier J, Claustrat F, Nazaret N, Fèvre Montange M, Claustrat B. Folate depletion changes gene expression of fatty acid metabolism, DNA synthesis, and circadian cycle in male mice. Nutrition research (New York, N.Y.) 2012. link 15 Stover PJ. Polymorphisms in 1-carbon metabolism, epigenetics and folate-related pathologies. Journal of nutrigenetics and nutrigenomics 2011. link 16 Dev S, Ahmad Wani N, Kaur J. Regulatory mechanisms of intestinal folate uptake in a rat model of folate oversupplementation. The British journal of nutrition 2011. link 17 Obeid R, Kirsch SH, Kasoha M, Eckert R, Herrmann W. Concentrations of unmetabolized folic acid and primary folate forms in plasma after folic acid treatment in older adults. Metabolism: clinical and experimental 2011. link 18 Crivello NA, Blusztajn JK, Joseph JA, Shukitt-Hale B, Smith DE. Short-term nutritional folate deficiency in rats has a greater effect on choline and acetylcholine metabolism in the peripheral nervous system than in the brain, and this effect escalates with age. Nutrition research (New York, N.Y.) 2010. link 19 Kim HA, Lim HS. Dietary folate intake, blood folate status, and urinary folate catabolite excretion in Korean women of childbearing age. Journal of nutritional science and vitaminology 2008. link 20 Dowd JB, Aiello AE. Did national folic acid fortification reduce socioeconomic and racial disparities in folate status in the US?. International journal of epidemiology 2008. link 21 Solis C, Veenema K, Ivanov AA, Tran S, Li R, Wang W et al.. Folate intake at RDA levels is inadequate for Mexican American men with the methylenetetrahydrofolate reductase 677TT genotype. The Journal of nutrition 2008. link 22 Meshkin B, Blum K. Folate nutrigenetics: a convergence of dietary folate metabolism, folic acid supplementation, and folate antagonist pharmacogenetics. Drug metabolism letters 2007. link 23 Scott JM. Reduced folate status is common and increases disease risk. It can be corrected by daily ingestion of supplements or fortification. Novartis Foundation symposium 2007. link 24 DeWolfe J. Folate intake of older adults before and after fortification of grain products. Canadian journal of dietetic practice and research : a publication of Dietitians of Canada = Revue canadienne de la pratique et de la recherche en dietetique : une publication des Dietetistes du Canada 2007. link 25 Díaz de la Garza RI, Gregory JF, Hanson AD. Folate biofortification of tomato fruit. Proceedings of the National Academy of Sciences of the United States of America 2007. link 26 Abramsson-Zetterberg L, Durling LJ, Yang-Wallentin F, Rytter E, Vessby B. The impact of folate status and folic acid supplementation on the micronucleus frequency in human erythrocytes. Mutation research 2006. link 27 Chen KJ, Pan WH, Shaw NS, Huang RF, Lin BF. Association between dietary folate-rich food intake and folate status of elderly Taiwanese. Asia Pacific journal of clinical nutrition 2005. link 28 Baró L, Martínez-Férez A, Rodríguez C, Valero A, Fonollá J, Lucena A et al.. The administration of a multivitamin/mineral fortified dairy product improves folate status and reduces plasma homocysteine concentration in women of reproductive age. International journal for vitamin and nutrition research. Internationale Zeitschrift fur Vitamin- und Ernahrungsforschung. Journal international de vitaminologie et de nutrition 2004. link 29 Henríquez P, Doreste J, Díaz-Cremades J, López-Blanco F, Alvarez-León E, Serra-Majem L. Folate status of adults living in the Canary Islands (Spain). International journal for vitamin and nutrition research. Internationale Zeitschrift fur Vitamin- und Ernahrungsforschung. Journal international de vitaminologie et de nutrition 2004. link 30 Hao L, Ma J, Stampfer MJ, Ren A, Tian Y, Tang Y et al.. Geographical, seasonal and gender differences in folate status among Chinese adults. The Journal of nutrition 2003. link 31 Grinblat J. Folate status in the aged. Clinics in geriatric medicine 1985. link

Folate deficiency glossitis