I read I scary article on artificial food additives recently, which said that apparently several have possible links with asthma/respiratory problems. Being too lazy to properly research which are ok & which are suspect I decided to totally cut them out of my diet. I've been completely amazed by the results! In just two weeks I've gone from 1200mcg of beclometasone a day to 400mcg (I have an agreed plan with my nurse for increasing/decreasing my dose as needed) & as a bonus my food cravings have almost totally disappeared so I'm eating far more sensibly & losing weight!
I just thought I'd post in case it helped anyone else, as it wasn't something that I'd thought about before.
PS I can find nothing bad about soya lecithins, so good quality chocolate's ok & Gu brownies are ok too!