B12d ships two types of injectable B12 - hydroxocobalamin, and methylcobalamin.
Hydroxocobalamin is in a salt as hydroxocobalamin acetate. It's the form that most people find the most useful, because it converts easily into both methylcobalamin and adenosylcobalamin, which two forms you need for all of the body's functions.
Methylcobalamin is in a salt with natrium chloride. It's a different form, and whereas quite a lot of people can convert this to adenosylcobalamin, a few people can't and they should take adenosylcobalamin tablets (eg dibencozide) at the same time as the injections.
Incidentally, there's no harm in taking tablets at the same time as injections. You can always buy the tablets from lots of online shops.
As far as i can find out, there are no strange solvents or anything else in the B12 we send out. We have had people asking, so it's possible/ probable that some manufacturers make their injectable B12 with strange things. Although i doubt that any B12 within the European Union (including UK) has anything dangerous in it. We were sure that USA methylcobalamin was also safe, but we couldn't buy it any more because European Union said that it couldn't confirm this - better safe than sorry, every time!
The Scottish Parliament discusses Pernicious Anaemia and vitamin B12 deficiency on Wednesday 7 March 2012.
This video is over 1 hour long and represents real political change - we are at last on our way.
Donna, like so many women, wants to live a normal life. Vitamin B12 could give her that chance.
Janette first appeared in the BBC InsideOut documentary in October 2006. Since then the NHS has forced her doctor to withdraw B12 replacement therapy on a number of occasions, and she tells of her struggles with having B12 and then having it taken away.
She has bravely agreed to be filmed without her usual wig, but her memory is playing up because it is so long since her last injection.
The definitive and original guide to B12 deficiency, Dr Chandy interviewed by Chris Jackson of UK BBC Inside Out Team broadcast 31 Oct 2008.
Dr Joseph Chandy explains symptoms and shows the restorative effect on one patient (other patients' families have asked that we edit out their stories unfortunately)
June describes her suffering when doctors didn't follow the standard protocol after any stomach or intestinal operation - to offer B12 replacement therapy
Susan gets very tired, which isn't much fun especially as she has so much to do. Here she tells her story.
Just the way it works for humans, oral B12 can make a world of a difference for your pet. My old cat Smudge chases the young cat again, climbs ladders (and climbs down herself), and is generally as fit as she was many years ago.
New documentary out from Elissa Leonard in North America, featuring Sally Pacholok and many other internationally renowned experts.
Frankie tells of how she suffered, the tests she had to endure until doctors worked out what was wrong, and what a difference it has made.
Dr Chandy was nominated for the North East Local Heroes award. The interviewer was at first surprised - people don't get awards for doing what they are paid to do - but she persisted.