There's definitely 4 in a pack, and I really like the taste of each flavour i've tried and they keep me full for a good few hours. I only buy them when they are on special offer though otherwise I think they're a bit expensive.
Surely how long they keep you full for would vary per person, someone who normally eats more and has a bigger appetite would probably find they don't keep them as full as long as someone who has a naturally smaller appetite.
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