There is no reason to increase B12 slowly, unless one is so near death (fragile) that any change (even improvement) can tip the balance. And that would be rare even in a fragile person.

Under almost all circumstances, the idea is to get stores refilled as quickly as possible.

Jarrett,

I'm so glad you have improved. I assume you meant 3 mg B12.

Regarding Melody's comment : Three mcg per day would prevent deficiency in those who have not begun to malabsorb severely, but for many of us they would be useless.

rose