Do meal replacement shakes actually work to lose weight?

i am wondering if anyone out there has actually succeeded to lose weight when on meal replacements am not interested if they are not good for me or what ever its my life an i want to do this i want to look good for my holiday i weight 17stone an i want to get down to about 11 before september so losing about 6... show more i am wondering if anyone out there has actually succeeded to lose weight when on meal replacements am not interested if they are not good for me or what ever its my life an i want to do this i want to look good for my holiday i weight 17stone an i want to get down to about 11 before september so losing about 6 stone obviously i dont want to gain it all again once am at my ideal weight i will slowly come off the meal replacements an eat proper and also do i have to work out everyday when on this.
Update: also what is the tastiest meal replacement shake
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