Hi everyone. I'm a new member but I've been reading the posts for over a year.
I've been having the same problems reported here but with the Enzymatic Therapy B12 Infusion. I had been taking them since last July. Then I bought a few bottles from VitaCost back in March. I noticed a color change in the pills but didn't think much of it. I also started to realize after taking the new supply for a couple months that my symptoms were coming back, but couldn't imagine why until I read these posts. Like the Jarrow B12, the Enzymatic Therapy B12 pills were almost white whereas before they had been pink. Since they were shipped in March, it doesn't seem likely that the change was due to heat during shipping. The expiration date on them is 2014.
After reading the posts here, I started Bluebonnet's Earth Sweet Chewable Methylcobalamin Vitamin B-12 as a sublingual yesterday. This morning I woke up with a headache which is the usual sign of detox/start-up symptoms for me. After taking them again today, I have a worse headache/mild flu-like symptoms. I'm convinced that I wasn't getting any or much B12 with the Enzymatic Therapy B12 Infusion after they changed somehow. The Bluebonnet B12's seem to be making a difference, although it's too early to tell yet. I'm willing to experiment, though, with different brands. I've already ordered the Holistic Health methyl B12 mega drops that Rich is thinking of switching to, so I'll be trying that too.