One thing that meal replacement drinks seem to lack (among other things, if I recall correctly) is fibre. The ones I've purchased (Ensure, Boost, etc.) don't co

One thing that meal replacement drinks seem to lack (among other things, if I recall correctly) is fibre. The ones I've purchased (Ensure, Boost, etc.) don't contain any fibre whatsoever. If you're at all prone to constipation and you rely a lot on those drinks you are in for a hard road.