Lose Weight and Keep It Off* Packed with everything you need for a tasty, balanced meal, our shakes can help you lose weight and keep it off* as part of the SlimFast 3.2.1. Plan. High in protein and a source of fibre, with 23 vitamins and minerals and no added sugar, they make the perfect calorie-controlled meal that you can shake-up in seconds. And what's more, there's no artificial colours, flavours or preservatives. SlimFast 3 2 1 Plan® It's simple, easy to stick to and proven to help you lose weight and keep it off*, plus you can eat up to 6 times a day.