do vitamin b12 injections make you lose weight Shots for Loss: An Honest answer The Timing of B12 Injections:

Acta 1831 , 276281 (2013)

Patients who notice no effect by day 7 are unlikely to benefit from continued injections without addressing other metabolic factors

As first described back in the 1950s, about one in ten people erupted in acne within days or even hours of getting an injection of vitamin B12, but it disappeared rapidly when the B12 shots stopped

If the cut-off for deficiency is set higher, you diagnose more people who have deficiency, but you also end up treating more people who dont have a deficiency

The better question is whether it matches your routine and gives you enough transparency to buy with confidence

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