A week ago, I weighed 92.3 kilograms. Since then, I have been on a calorie-controlled diet comprised solely of food available at McDonald's. I have been consuming no more than 1700 calories a day (around 7200 kilojoules), as well as scheduling 45 minutes of deliberate exercise a day. When I jumped on the scales this morning, I weighed . . .

I swear I didn't plan it this way. It was only when I looked at my menu for Sunday, the final day in my week-long quest to see if I could lose weight on an all-McDonald's diet, that I realised that the menu I had planned was almost identical to what I had eaten on the first day of the diet.

For complicated reasons that will be fully explained here in a couple of weeks, I was in Bathurst, some 200 kilometres out of Sydney, first thing Saturday. Because it was early in the morning and I wasn't near home or the office, I decided to get a coffee rather than an orange juice with my compulsory McDonald's breakfast. This turned out to have unexpected consequences.

So Lifehacker readers voted for me to eat a Quarter Pounder for lunch yesterday as part of my all McDonald’s diet. The Quarter Pounder is, quite honestly, one of the duller items on the menu, so what was I going to do? The answer was to glam it up.

When you're on a diet that has restricted calorie counts and specific rules, sacrifices are involved. I'm not going to pretend these are always easy to ignore. This is what I'm not enjoying about my McDonald's-only diet.

With less (often much less) than 2000 calories a day, my McDonald's-only diet definitely hits the mark in terms of energy requirements. But how does it stack up on other nutritional measures: protein, fat and sodium? As you might well expect, it's salt that's the biggest problem. Plus: vote for what I eat tomorrow!

Despite an apparent widespread belief that there's no way I could possibly feel full while eating nothing but a calorie-controlled diet of food entirely from McDonald's, hunger has not been an issue. At no point has my stomach felt unacceptably empty. My wallet? That's another story.

Day 1: When you tell people that you're going on a McDonald's-only diet, they're more than willing to offer advice, suggesting which items you should skip and which foods are a good choice. The problem is that a lot of it is misinformed.