Naomi White Communications has announced that it has been appointed to handle the PR for health technology company Lumen. Lumen is a handheld, portable device and app that measures your metabolism in real-time with just your breath. Lumen works by measuring your body’s carbon dioxide concentration by breathing into a handheld Lumen device. These levels, calculated through Lumen’s vast scientific research and development, indicate the type of fuel your body is using to produce energy - a mix of fat or carbs.