Downloadable software for collecting, measuring, monitoring and analyzing blood analytes; downloadable software for use with wearable devices for capturing and reporting metabolic health and weight optimization data and insights; downloadable software for use with wearable devices for analyzing, and providing feedback on, data related to a user's nutrition, exercise, weight optimization and fitness habits; downloadable computer software for providing health, wellness, medical and weight optimization information, including information related to weight loss, muscle gain and other weight modification; wearable electronic devices, namely, sensors that are comprised of computer hardware and downloadable software that communicates data to smart phones, personal digital assistants, and personal computers through the Internet and other computer and electronic communication networks; wearable digital electronic devices comprised primarily of computer hardware and downloadable software for alerts, messages, and reminders, and for recording, organizing, transmitting, manipulating, reviewing, and receiving data