The easiest way i found to cheat with Cheat engine is doing the following:
1. Use Cheat Engine and search for 2 Byte values
2. Pause the game and search for the value you want (HP Calories etc.)
3. Either take some damage or run around to change your HP or Calorie value
4. Pause and do the "next Scan" in CE
5. When you find the right Address, add it to the addresslist at the bottom
6. Right click that address and choose "Find out what writes to this address", it will open a window called "The following opcodes write to (value name)" with no entries
7. Move or take damage to change the value again, and in the opcode window thing, there should be a new entry
8. Click that entry and press the button "Replace"
9. This will make it so that the value will not be changed anymore by the specific action you chose to do (eg if you took damage to lower your health, using "Replace" will make it so that taking damage isnt allowed to change the HP value anymore"
The only problem with this is, if you make it so you dont lose health from damage anymore, it will also make it so enemies will not take damage, not the end of the world
If you want to revert this you need to save and close the game completely, then reload the save
And the reason you'd want to do this is because 1. Freezing the value apparently crashes the game and 2. The actual Values (Hp and Calories) seem to constantly switch the address they're tied to in memory, meaning you have to always do a new scan to find new address the HP/Calories is tied to
Hope this helps yall