Translations:Vitamin D/94/en: Difference between revisions
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Latest revision as of 08:41, 26 January 2024
Land vertebrates required another source of vitamin D other than plants for their calcified skeletons. They had to either ingest it or be exposed to sunlight to photosynthesize it in their skin. Land vertebrates have been photosynthesizing vitamin D for more than 350 million years.