I've had some random periods of clearing and am currently experiencing a good level of clearing on a lower diary diet. More importantly it's high soy ... I think diet is an important element to successful management of P but it's been a very very rocky road for me. I've had periods of very strict elimination, I went without diary or eggs for about a year and found it helped ease my IBS. It was during this period of strict elimination that my P first appeared ... I was however also the most stressed I have ever been in my life and had lost enough weight to make me look a bit odd.
So I've been on various 'diets' over the years and I guess I'm relatively healthy. No 'fast food' (i.e. MacDonald or KFC or any of the other ones- haven't had either for about 20 years). No potatoes (for the past 5 years). No red or white meat (Since June/July last year). I've cut down on diary - so I have soy milk instead of normal milk (that's been going for about 6 months).
I still eat small amounts of fish (on average once a week), cheese, yogurt & butter, and bread (mmm carbs). Lots of veg and not much fruit. And then there's soya ... lots and lots of soya.
Yesterday was a terrible diet day (was feeling unwell so didn't want to eat): Toast with home made marmelade, soya latte, welsh rarebit, three leftover quorn sausages and some soup.
Today has been better: naughty cup of tea, porridge (made with soy milk), soya latte - lunch is going to be a raw foods salad (with seeds and nuts on top) and some lentil soup, maybe an apple or a banana, not sure about dinner yet but probably steamed veggies and tofu.
However, most of my diet is aimed to give me relief from IBS. The P is bad, it makes me unhappy but it doesn't leave me housebound. So I do the barney's formula thing and then there's my soy thing ... it's working for now. Fingers crossed it will keep working!
I'm not following a 'strict diet' at all but it's considered restrictive by some. Everyone seems to have a slightly different set of conditions that triggered their P and also as a result a slightly different set of conditions that help to manage it.