{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T15:14:52Z","timestamp":1789139692096,"version":"build-2803163510"},"reference-count":28,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T00:00:00Z","timestamp":1789084800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Nutr."],"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Ketogenic diets are used in various clinical and non-clinical contexts in adults. Due to the high degree of restriction in certain ketogenic diet variations, there is a potential risk of insufficient micronutrient intake and systematic analyses of nutrient supply in adults remain sparse.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Optimized, hypothetical daily ketogenic meal plans were created for adults aged 19 to over 65\u202fyears, with ketogenic ratios of 3:1, 2:1, and 1:1. The analysis was carried out separately for four age groups. Nutrient calculations were based on the German Nutrient Database using the PRODI\u00ae nutrition software (Nutri-Science GmbH, Germany). The calculated micronutrient intakes were compared with age-related national reference values for each age group. Supply &amp;lt; 95% was considered as potentially critical.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Relevant deficiencies were observed in all age groups, particularly in fiber, vitamin D, several B vitamins, potassium, zinc and fluoride. As restrictiveness decreased, intake levels improved, with the 1:1 ratio showing the highest overall micronutrient density. Regardless of the ratio, vitamin D, fiber and fluoride remained potentially critical in all age groups.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Strict ketogenic ratios carry a high risk of micronutrient deficiencies. Although liberal ratios improve supply, there are still structural nutrient restrictions. Therefore, careful food selection and nutritional therapy support remain essential.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fnut.2026.1829975","type":"journal-article","created":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T14:57:11Z","timestamp":1789138631000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Analysis of critical nutrients in ketogenic diets for adults based on optimized hypothetical meal plans"],"prefix":"10.3389","volume":"13","author":[{"given":"Marc","family":"Assmann","sequence":"first","affiliation":[{"name":"Center for Nutrition & Therapy (NuT), University of Applied Sciences Muenster","place":["Muenster, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isabel","family":"Albrecht","sequence":"additional","affiliation":[{"name":"Center for Nutrition & Therapy (NuT), University of Applied Sciences Muenster","place":["Muenster, 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