Not sure. You can try this for the next two days:
Day 1) Have coffee, no chocolate. Wait till headache arises. Have coffee. Record results.
Day 2) Have coffee, no chocolate. Wait till headache arises. Have sugar. Record results.
Not sure. You can try this for the next two days:
Day 1) Have coffee, no chocolate. Wait till headache arises. Have coffee. Record results.
Day 2) Have coffee, no chocolate. Wait till headache arises. Have sugar. Record results.
If it's not Isuzu-chan Mii~