I've been self-injecting 1mg hydroxocobalamin frequently for the past year, which has gradually reduced my tingling and fatigue by about 90%. I started with every other day shots, have been able to gradually stretch the time to every 3 or 4 days. I usually feel tired before a shot, and more energetic afterward. I haven't been diagnosed with PA, as my test results were inconclusive, but for whatever reason I need a lot of B12.
About two weeks ago, I started some aspects of the Cusack protocol, which supports collagen growth in EDS (Ehler-Danlos Syndrome) (note: I don't have EDS). I was a bit surprised to find that my residual tingling and fatigue both dropped quickly, so that my tingling is often barely noticeable now, and my exercise tolerance has significantly improved. I almost feel normal. I also found that I didn't really need my B12 shot last week, so I pushed out my injection schedule to every 7 days, and I still felt fine.
I'm not sure which part of the protocol is helping me, but here are the new things I've been taking:
PQQ by Jarrow, 1 capsule, 10mg
Lion's Mane by Host Defense, 1 capsule, 275mg
D-ribose powder, 1000-2000mg
George's Distilled Aloe Vera, 2 ounces
I'm not sure yet which of these supplements is helping me. PQQ and D-ribose help mitochondria. Lion's Mane is supposed to be good for the nervous system. Distilled aloe vera helps the gut.
I'll report back later if anything changes, or if I figure out which of the supplements is the magic one. If anyone has experience or info about any of these, please let me know.
peripheral neuropathy 
B12 and anxiety
Not tolerating hydroxycobalamin lozenges
B12 INJECTIONS
