Yeah it's definitely much easier to keep a rough estimate in your head. Just knowing that a piece of cheese is 400kJ, a beer is 450 and a can of coke 900 is wo

Yeah it's definitely much easier to keep a rough estimate in your head. Just knowing that a piece of cheese is 400kJ, a beer is 450 and a can of coke 900 is worthwhile. People tend to underestimate their eating habits if they don't keep a rigorous diary but it's far better than nothing and was a big help in losing weight for me (along with working to find an exercise regime I could actually covert to a habit, even though I still hate every minute of it).