Can soy cause cramping?

I'm not sure anyone has had this issue, if it is a food allergy, but here goes...

I've eaten Clif bars occasionally without a problem. But recently I purchased a whole box and started eating them more regularly. At first, the discomfort was negligible so I ignored it. However, after a week of eating at least one per day, now my stomach seizes up with cramps. This happens within a few minutes of eating one. The cramps go away after a few minutes, and I go out on my rides fine, but I'm left with a "heavy" feeling like I have a rock sitting in my stomach.

The only thing that ever gave me a similar reaction was a few years ago, when I experimented having a Slimfast shake every day for lunch. The only common denominator I could think of is soy protein. But I eat soy all the time... tofu, edamame, no problems.

Oh, one more thing... I tried eating a Clif bar with some organic digestive enzymes. The cramps never came, but the "heavy" feeling persisted. Has anyone else had or heard of this problem?

Yes

and if soy is causing cramping keep on eye on peanuts and legumes since they're all part of the same family. I don't have a problem with the occasional soy milk in my coffee but I can't drink soy milk every day or eat soy-based products on a daily basis.

I can eat a tonne of tempeh (fermented soy) but too much soy in other forms can give me trouble.

Yes, it is possible for soy to cause problems.

My younger sister is fine with soy sauce, tempeh, etc, but anything containing soy lecithin gives her bad cramping pains up her back. My suggestion would be to avoid Clif bars and try something else.

Clif bars *always* give me gas. I don't know from other soy stuff (hmmm.... what *did* I eat before last Tuesday?) Give me good ol' PowerBars, any time... or a banana...