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Methylcobalamin increases Erk1/2 and Akt activities through the methylation cycle and promotes nerve regeneration in a rat sciatic nerve injury model

Life as we knew it is slowly regaining normalcy

Melanomas were sporadically induced by painting the mouse ears with 4-hydroxytamoxifen (25 L of 30 mg/mL) (Sigma H7904)

Brain and behavior

I just wonder if the extra B12 from your jab is working to repair deficiency damage sustained while you were waiting for your jab and as everything is going full tilt it is using up other resources more quickly than you can replace them so you are getting other deficiency symptoms a couple of days after your injection