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A comprehensive literature search was conducted using the MEDLINE database (PubMed) for English-language articles published up to May 2025 using combinations of key search terms including diabetes mellitus, diabetes, neuropathy, polyneuropathy, diabetic neuropathies, peripheral neuropathy, diabetic polyneuropathy, pathophysiology, diagnosis and treatment. Articles were selected that primarily focused on DPN, with emphasis on human studies addressing the pathophysiology, clinical presentation, diagnostic approaches and therapeutic interventions
Glow from Within
A report from the Framingham Offspring Study of 2,999 adults found the following average daily B12 intakes, including fortified foods and supplements (Tucker, 2000): Age 26-49: 8.9 g Age 50-64: 8.7 g Age 65-83: 8.5 g A 2015-2016 National Health and Nutrition Examination Survey of over 4,500 adults 60 years and older found the following average daily B12 intakes (USDA NHANES, 2019): Male non-supplement users (68% of men): 4.5 g Male supplement users: 5.3 g from food plus 326 g from supplements Female non-supplement users (63% of women): 3.6 g Female supplement users: 3.8 g from food plus 520 g from supplements European Food Safety Authoritys Recommendations In 2015, the EFSA released recommendations for B12 intake across Europe