how long after b12 injection will i feel better Does It Take for Vitamin to Work? Simple Guide Feeling worse after B12 Injection:

Older people and people with digestive tract conditions are most at-risk for developing vitamin B12 deficiencies

a single 50 mg vial supplies ~1020 days

By inhibiting NNMT, it leads to an increase in intracellular levels of NAD+ (nicotinamide adenine dinucleotide), a critical coenzyme for cellular metabolism and mitochondrial energy production

Less commonly, people with vitamin B12 deficiency due to long-term poor diet may be advised to stop taking the pill once vitamin B12 levels have been restored to normal and their diet has improved

Absorption: Conditions like celiac disease, IBS, or pernicious anemia can affect how your body takes in B12

NHS guidance does not support the use of B12 injections for individuals without confirmed deficiency, nor does it recommend lipotropic injections for any indication