Feel normal only after injecting?

I feel absolutely amazing and switched on after I inject my b12. But it wears off by the next morning.

Is this common?

I was supplementing and my labs showed 1000 b12 and 11 folate before injections - won’t be accurate due to supplementing with vitamin drinks.

Does this mean I should inject every day? My exhaustion and pain just come right back the following morning.

Thanks 🙏