Yes, I've definately heard AND experience this.
For me the following foods/food additives will cause my joints to flare-up (no matter how much of it I consume):
- MSG. This one is the worst.
- Peppers (during my first major flare-up I found that all peppers caused my joints to swell. This time around I'm not sure if they will cause my joints to swell because I haven't "tested" it, but I'm staying away from them just in case).
I generally try to follow an anti-inflammatory diet, just to be safe:
- No MSG whatsoever
- Limited sugar and caffeine
- Limited red meat
- Increased Omega 3s (flaxseed, salmon) as well as olive oil
- Limited bad fats
- No nightshade veggies (tomatoes, mushrooms, eggplant, peppers, potatoes). They contain solanine which can cause pain/inflammation in some people.
- Increased wholegrains (higher fibre and nutrients than "white" stuff).
- Lots of colourful fruits and veggies (the brighter the colour, the better. This is because phytomchemicals in the pigment have anti-inflammatory charateristics).
- Water! Water! Water!
Of course you don't have to follow an anti-inflammatory diet, but personally I feel better knowing I'm doing all I can to prevent further pain and discomfort. It's not always fun, but to be honest, I've really grown to CRAVE these healthy foods now. I used to always want chocolate or pizza or whatever else, but now (especially because I'm in the midst of a major flareup) I only want to consume foods/beverages that I know are helping my body to repair.
Oh! one more thing. I've also read that Lupus patients should avoid Echinacea because it boosts the Immune System.