This addon adds 6 medical items in MCPE to help you , you can find in this addon plasters , bandages , medicine , medkit , enchanted medkit , medical plants soup .
these items can heal you and full your hunger bar .
For get all these items you can craft them in crafting table .
Good luck :)
Select version for changelog:
Changelog
Adds new 7+ medical items (Pills) ,
Fix bugs ,
Adds new textures .
Here is a quick suggestion: there is a Java mod called First Aid, now this mod does the exact same thing as what you are doing but, but it also adds a new health system
I'd say go check it out and see if it is possible to add this "new health system"?