This thread illustrates so well why the hapless shopper is likely to be found sitting under a supermarket display cabinet rocking and sucking a thumb.
Trying to pin down the best nutrition advice, when experts constantly contradict themselves, has become almost impossible . My own choice is to try to stick to natural products that have not been processed. That won't work for everyone due to opinions, professional advice, and personal taste. I could go quietly mad if I start thinking about what cows might be injected with, and what they might be eating, that might be forming part of the butter on the toast with those scrambled eggs that I have just enjoyed so much, but hey, I've got to die from something!