[shiroiushi]

>laying on a table so someone can implant a device that handles it for you forever does sound a whole lot easier than having to actively balance your intakes for your entire life.

Even better would be an implant that not only removes excess glucose (or other material) from your bloodstream, but also monitors your bloodstream for nutrients and tells you the levels of all of them, and lets you know when you're deficient in something. Then you can get a notification on your phone from your implants saying "Warning: your iron level is low. Please eat some beets soon."