Up to 20% of people over 60 may become deficient according to UCLA Health (2022), and the National Institutes of Health estimates that 10 to 30% of older adults cannot absorb naturally occurring vitamin B12 from food
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Levtchenko E, Servais A, Hulton SA, Ariceta G, Emma F, Game DS, Lange K, Lapatto R, Liang H, Sberro-Soussan R, Topaloglu R, Das AM, Webb NJA, Wanner C (2022) Expert guidance on the multidisciplinary management of cystinosis in adolescent and adult patients
Most protocols recommend picking one general area for consistency, then rotating specific spots within that area
Epub 2011/12/03 Miyamoto K, Sato EF, Kasahara E, et al
L., Weller, S., Holbrook, M., Gokce, N., Hagen, T