Younger adults at Slimming World gain life-changing benefits beyond the scales, research reveals New research reveals members aged 18–34 who attend a Slimming World group are not only losing weight but gaining confidence, improving their physical and mental health and building healthy new habits for life. Slimming World Consultant Ren says for younger adults in Belfast it’s the power of real-life connection and being part of a group that’s making all the difference.