Can methylcobalamin B12 help drop foot?

Foot drop. B12 supplementation can help foot drop or neuropathy if the underlying cause is B12 deficiency. However, other causes of foot drop need to be investigated thoroughly before attributing it to B12 deficiency.
EBM vs anecdotal . We try to practice evidence-based medicine (ebm) whenever possible but sometimes we just don't have proof (and may never). For instance, we have no randomized double-blind placebo-controlled evidence that people w/parachute jumping from an airplane live more than those who jump w/o parachute. Yet, we always use parachutes! so if B12 helps you, and there's no downside, i'd say keep using it.