Update
One week ago, I started on 1/4 tab a day, split dose, of Enyzmatic Therapy B12 Infusion. That's a 1,000mcg tablet of Mb12.
Nothing much happened until day 3, when I got a rush of energy. Day 5 was beautiful, and I gardened - raking, pulling wisteria vines. Please don't yell at me - it was really fun. Of course the next morning I was pretty crashed. But I took my morning potassium and the aches and pains from raking disappeared!
I had a party to go to that night, and happily my energy was stable and pretty high by the time I met my ride. Half way through, I got that heavy-slow feeling....and took the potassium I'd brought. And then I was fine again. I'm finding this very strange, but also sort of amazing. I got home at 11 that night, feeling fine.
This peak-crash cycle continues, and runs pretty fast. Yesterday (the day after the party) I spent the morning in pjs on the couch, very tired,headachy, and stupid-brained. In the afternoon my brain felt hot, electrical, like it was burning. Potassium didn't help, so I laid down and meditated - first time in forever - and after a half hour I felt cool and much much better. And then just like the day before, my energy returned.
I've been dealing with tension headaches and nausea every day, which is new for me. Both usually hit as soon as I get out of bed, and dissipate sometime in the morning. Potassium helps, but not 100%.
I'm describing how I feel loosely, because it's very up and down. Overall, the benefits physically are matched by improved cognition across the board (memory, quickness, sociability, clarity), and both are lost again together. The peaks are higher than my normal best days, and the lows are lower than my typical worst, but not terrifying.
For me, potassium is absolutely a charm. I've found blood tests as far back as 1996 showing my potassium levels ranging from 3.7 - 3.9, which in this group is considered low. I'm still eating fruit/vegetables only once a day, and I get an additional 1500mg in potassium tablets, and 1800mg in cocoa.
EDIT: Re. food folates + solgar: I had 4 solgar + chicken with cooked onions/peppers (low folate veggies) and corn/flax chips (folates) for lunch. I was tired within 20 minutes of eating, and am still sleepy and fuzzy 4 hours later. My physical energy is OK; it only hit my brain. So I'm still figuring this out.