I talk about doing well after daily injections for 3 years. This is true.
however I went to Italy, walked 9 hours a day, plus wine daily. The two things that can surely deplete B12 ... AND had forgot my B12!!!
I thought 12 days without it wouldn't matter.
Wrong!
All my symptoms returned. Not as bad but still bad enough.
Brain fog.
Severe back pain and sciatica
Severe fatigue
Once I started injecting twice a day , 3mg per day (1.5 mg each dose). I started improving. 1.5 mg once daily wasn't enough.
This however made me realize that in my case, I can't go without the injections, especially when I exercise so much.
last year I hiked 50 miles through Patagonia just fine. But I was injecting 3mg per day to accommodate for the exercise and I stained from alcohol.
lesson learned. Hope this helps some people in some way. This may not apply to everyone.
cheers to all the B12ers here and to PAS!!!!