is b12 injections safe How to Give a Injection: Step-By-Step Instructions Vitamin B12 Injection | Causes

Special Populations Older adults often face declining B12 absorption due to reduced stomach acid

Taniki N, Nakamoto N, Chu PS, Mikami Y, Amiya T, Teratani T, Suzuki T, Tsukimi T, Fukuda S, Yamaguchi A, Shiba S, Miyake R, Katayama T, Ebinuma H, Kanai T (2018) Intestinal barrier regulates immune responses in the liver via IL-10-producing macrophages

There is some evidence that the diabetes drug metformin (Glucophage) may reduce vitamin B12 absorption when used for several years

When Direct Medical Supervision Is Required While many can manage their injections, some need direct medical supervision

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