Copy paste from another message of mine:
A Fitness route, including a gym you can run, was already announced!
It will be used to lower the towns obesity rate, so it would be congruent when characters can get addicted to workout and lose weight when on their own!
Detox gain shake to get sober from workout might also be on the menu?
Basically exactly the opposite of what dizzys does!?
For the time beeing the best way to lose weight is usinge the "Medical Mastery Temporary Boost" in combination with "Weight Loss Medication" from the pharmacy. However the boosts are only available in later game, when you have reached MAX Level 20 - so don't get fat in earlygame :P
Cooking was also discussed since the beginning of the game, so im quite sure it will be a thing soon.
