Been working so didn't see the programme, but a year or so ago, when I was tested for food intolerances, I was also tested for vitamin and mineral deficiencies and was found to be lacking in Iron (so that's why I was always knackered), Essential Fatty somethings, was it Acids?, not sure what they do, and Selenium.
When I took a decent iron supplement (from a health food shop) I started to have a lot more energy. And Selenium helps to regulate your blood sugar levels and reduce cravings, and that helps too.
Not sure about the yogurt thingummys, and with a lactose intolerance I doubt I'll be finding out lol!