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B12 injections can lead to improved energy levels, enhanced cognitive function, better mood, and support for the nervous system

Reference: Nicotinamide N-Methyltransferase in Cardiovascular Diseases: Metabolic Regulator and Emerging Therapeutic Target (2025)

Unlike oral B12 supplements, which depend on intrinsic factor production in the stomach for absorption and lose 5070% bioavailability in the digestive process, injectable B12 achieves near-100% bioavailability by delivering the vitamin directly into circulation

While Vitamin D, calcium and iron deficiencies are relatively common irrespective of whether someone has had bariatic surgery, Vitamin B12 deficiency can occur for special reasons after a gastric bypass

but companion only makes sense when the physiology and the plan make sense