This b12 is ridiculous

So sorry to hear that you are feeling awful. What exactly is the b12 suppose to do for you? If the shot will work better for you I hope that you can get on that. They don't seem to offer very much help for the pain that you go through.

The only "side effect" I've had from the B12 shot is occassional bruising at the injection site. I only get it once a month or so.

I can't think of why it should cause you an upset stomach, but it may be that you are sensitive to one of the ingredients in the liquid. It might not be the B12 itself. B12 is important to production of blood cells, to the body's detoxification process, and very importantly to the function of the nervous system. The problem with B12 is that it needs a chemical called "intrinsic factor" in order to be digested. This substance is created in the stomach when the stomach acidity is at the right level. If your stomach acid tends to be too low - as often happens when you are older, or if you take a lot of antacid medications - you do not get the benefit of the B12 even if you take supplements. Whether your colitis would also affect the absorption of that vitamin I do not know but it seems like a possibility. Maybe ask your doctor. If you get insufficient B12 you don't know right away because often the body stores up to two years' suppy of the vitamin. Eventually, you would get symptoms such as poor memory and cognitive problems as B12 is essential to our nervous system and the activity of our brains. Some years ago in the U.S. there was some research done which showed the importance of B12. They took every old person in one nursing home who had been diagnosed with dementia and gave them all a course of B12 injections. To their amazement, many improved dramatically, so much so that 4 out of 10 were actually able to go home and look after themselves. Sadly, some had the deficiency so long that permanent damage had arisen. If you do have a deficiency of B12, it is important to address that as soon as possible. (This is not saying that all dementia is down to B12 deficiency, but that a deficiency can cause symptoms similar to dementia) Most young people, however, can digest B12 and it might be better to get as much as you can from food rather than from supplements. It's found in meat, fish and dairy products. Some people can actually have an allergic reaction to the B12 itself in supplements, although this is rare. It's generally the case that the shots are far more likely to produce side-effects than the oral supplements, so shots would probably not solve the problem. Some doctors say the side-effects are caused by the preservative in the shots and not by the B12 itself.

Remember the body absorbs vitamins through food. Take your supplement in the middle of a meal. Maybe that will help.