B-12 is fine.
What you don't want are things advertised to "boost the immune system". Lupus is the fancy name for an over-active immune system, which is what we have. Take our over-active immune systems, boost them up to be even more over-active, and you get a big mess!!!
Also, always tell your Drs at every appointment what you are taking, both prescript
ions and over-the-counter. Include vitamins, minerals, and any other supplements. Include if you are trying any special diets that are different than what you would normally eat. I generally take a drug list with me that includes this stuff and my med allergies. Better to tell them multiple times than to have them overlook it!!
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2002DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde