Over the years (and there have been many) I've noticed that I seem to fart a lot less than many other folk - e.g. my workmates, friends. Not only that, but mine are mostly odourless, not the room-emptying stench type. I put this down to a fairly balanced diet and a minimal beer intake. However, things seem to have changed recently as it seems I'm constantly farting and they're usually rather ripe.
Over the past 3 months or so, I've been doing a bit more intensive training, including the use of additives such as PSP22 and some energy gels. In addition, I've done a couple of sportives where I was using these as a bit of a performance enhancement. Now - I could accept the fact that these products could change my internal working a little, but it's now over two weeks since I used any and the farts are still frequent and rank.
Is it possible that I've made some more permanent change to my gut chemistry? If so, is it reversible?