Kawther studied for a BSc in Nutrition at King’s College London. Since graduating, Kawther has worked for Unilever as a Development Nutritionist, before going on to work for Sustain: the alliance for better food and farming, on the successful Children's Food Campaign. Kawther left Sustain, due to lack of funding, to work for Consumers International as nutrition and food safety programme assistant before joining Action on Salt and World Action on Salt and Health in 2012.

Kawther has completed a Masters in Food Policy at City University London and a PhD on sugar reduction at Queen Mary University of London. Kawther is now responsible for driving the Action on Sugar campaign and our sugar and calorie reduction research. Alongside her current roles, Kawther is also a visiting lecturer on nutrition and food policy at several UK universities, a Trustee at Sustain: the Alliance for better food and farming and is regularly invited to comment on nutrition topics in the media.