had b12 injection but still tired Vitamin | Causes of Fatigue and Energy Support What Is B12 Injection What's

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B12 injections can administered subcutaneously (under the skin) or intramuscularly (into a muscle)

(Aureli A, et al., International Journal of Molecular Sciences, 2023 PubMed: 38068911 ) B12 and lipid metabolism A review of pre-clinical and clinical evidence found low B12 is associated with adverse lipid profiles including elevated total cholesterol and LDL, particularly in people with type 2 diabetes

Its known for its longer-lasting effects because it stays in the body longer than the other types