Getting energy from food isn't as complicated as it sounds. For a simple and easy to understand overview of how this process happens we have linked the following button to an interactive chart of how it all comes together. Spend 5 minutes studying it and impress your friends with your in-depth knowledge of the metabolic pathways!
Many people are unhappy with the BMI as an indication of health and weight. Here is a link to another measurement that is gaining popularity, the Waist to Height ratio
If you want to find out what the results of your blood tests show, click the button. (Of course you will need some blood test results first!)
Here is a place I found that you can get data about your favourite foods and store it in your own database. You may want to ignore their bias regarding what 'good' and 'bad' foods are though...
You burn calories just by staying in bed. Work out what calories your body requires just to keep ticking over...
Great calculator to work out a ketogenic oriented set of nutrition targets. Use it in conjunction with MyFitnessPal if you like.
MyFitnessPal is a website that you can go to for free and keep track of your calories in and out. While I wouldn't necessarily deem it important to count calories because I've been losing weight quite happily without doing so, I found it handy for helping someone who has stalled on their weight loss plan. It helps by making you a bit more aware of what the effect of a snack might be and alternatively how you can just go for a walk or a bike ride and lose that net gain from your snack. I wouldn't go to much by the recommended fat and carbohydrate targets, since if you are like me you want to get rid of carbs from your diet and get your calories from fat.