Google was eager to understand what factors contribute to good metabolic health, as it was discovered that only 12% of adults in America fit that category. Fitbit wearables and Google's Pixel Watch are outfitted with sensors to help capture data about a user's metabolism. However, Google wanted to go deeper, requiring users to submit a blood sample to measure cholesterol, triglycerides, and insulin levels. Fitbit submitted a discovery of a patent regarding a device that could monitor a user's mental health back in January. The patent was originally filed in 2021 but recently received approval in January 2024. Such a device is said to use machine learning to assess if the wearer has a mental disorder, like depression.