Protein supplements are generating huge profits - but do they really help you slim?

Kelly, a 19-year-old trainee nail technician from Kent, started skipping lunch for a vanilla shake about a year ago. She has what's called a Slender Blend from Protein World, the company whose "beach body ready" adverts caused such controversy a few months ago. Sometimes she finds the 150-calorie drink too much so she halves the quantity to just a 200ml cup. Earlier this year she started taking Protein World pills alongside the shake to give her a little caffeine boost in the afternoon. Since s