Summary:
- The article discusses a new wearable device called Lumen that can track users' metabolism and provide personalized nutrition recommendations.
- Lumen is a handheld device that measures the user's carbon dioxide levels to determine whether they are burning fat or carbohydrates, allowing it to provide real-time feedback on the user's metabolism.
- The device uses this information to suggest meal plans and provide insights into the user's nutritional needs, making it easier for people to manage their diet and improve their overall health.