If I eat alpen light bas I get terrible trapped wind. Never had it before, has me doubled up the pain went right up my back. A friend, a very good friend as it turns out, at work told me I need to pass that wind I went for a quick walk outside....and without being a bit crass I have never farted like that in my life. I swear it was ridiculous the noises I was making, thankfully nobody near to hear so embarrassing. Instant relief though. I now steer clear of the alpens!!!