Fat and sugar can be as addictive as drugs. Use our plan to wean yourself off class-A foods and find out how to get your nutritional highs elsewhere

We're all familiar with the lure of a dirty burger. But what few of us realise is that the urge comes not just from your stomach, but deep inside your skull. According to a study from the Scripps Research Institute in Florida, junk food has the same effect on your brain chemistry as cocaine and heroine, and for some people it can be equally addictive.

"We found that an excess of foods high in sugar and fat resulted in a deficit in the brain's reward systems, much like drug dependency," says neuroscientist Dr Paul Kenny, the author of the study. Those foods are tempting because they trigger the release of chemicals that make you feel good.such as dopamine and serotonin. And the more you get that post-gorge high, the more you seek the food that causes it. Eventually. the 'neurochemical pattern' of all-you-can-eat junk makes the urge for that fix hard to resist. The result is that you become addicted to crap.

That's the bad news. The good news is that there's a way to regain control without going cold turkey. The key is to supply your brain with the same reward triggers, but from activities and foods that aid your fitness and weight-loss plans. Rather than over-stimulating your brain, these beneficial rewards are released Steadily and, in time, you will become addicted to healthy things instead.

Help is on hand from Dr Mike Dow, an addiction specialist and author of Diet Rehab. His pain-free plan is designed to help you overcome a reliance on unhealthy food, without having to swear off it for life.

Nobody can go from Homer Simpson to Ned Flanders in a day. We know this. Noris there any need to make that change for good. The key is to strategically cut the crap over four weeks, says Dow. "You replace junk with healthy alternatives that stimulate the same feel-good brain chemicals."

In the first week,all you have to do is swap one item of junk food for something wholesome and do one 'booster activity' per day. This includes exercise, which triggers the same reward system in your brain as food, but anything that makes you feel good afterwards will do the job.

"write a note to a friend, take a look at some old holiday photos or start planning your weekend," Dow says. If you can work some competitive action into the mix, then all the better. A study at the University of Southern California showed that engaging in competition - even if it's just a game of poker- causes a spike in your dopamine levels.

In the second week, include two food swaps and two boosters per day. In the third week you include three,and so on.

For example, a doughnut could be replaced with a bowl of wholegrain cereal and berries, plus booking your next trip away. Cheese burger urges can be atisfied with a bag of beef jerky and a run along a new route.

If at any stage you feel yourself struggling, try to rate your level of hunger out of 10. Remember, these urges start in your brain and not your stomach, so unless you're at seven or above - that's genuine hunger - fight back.

Now that the days are getting longer you can also try bathing your cravings in sunlight. A study in journal The Lancet showed that serotonin levels in healthy adults are directly correlated to the amount of sunlight in the day. That means the more light you get, the less junk you want.

The longer you use these methods, the easier it becomes. "Eventually you remove yourself from the negative cycle of eating bad foods, overstimulating your brain and needing more and more to get the same hit," says Dow. "You'll start to associate healthy foods with reward and will have a much better balance of brain chemicals." In other words, you'll be a health-food junkie.

There's science behind why we find unhealthy food so more-ish...

When you're feeling down, you crave foods that mix fat and sugar. The heady combo floods the brain with the neurotransmitter dopamine, giving you an instant mood boost.

Once you get a taste for junk food, your body will start to release endocannabinoids. This 'just-one-more' chemical has properties similar to marijuana and ensures you'll never leave that last chip.

An excess of unhealthy food inhibits the dopamine receptors in your brain. This means you'll need increasing amounts of the stuff you crave to get your high.

Getting competitive cuts your cravings


When you're free from addiction, use these rules to plan your meals and double your healthy highs

Fibrous carbs fill you up and release serotonin steadily, so you can stay mellow as work stress starts to bite.



Try:porridge, Weetabix,rye toast

Regular snacking keeps dopamine levels up, while the amino acid tryptophan will boost serotonin.
Snack 1



Try: pistachio, beefjerky, soy nuts

A study in Neurochemical Research found this vitamin helps to maintain dopamine receptors in the brain.

Try: sashimi, tuna, chicken salad

Like tryptophan, tyrosine increases the production of happy-hormones, to keep you going through to 5pm.
Snack 2

Try: banana, milk,cottage cheese

To enhance vitamin E's cheering effect, add it to mood-enhancing lean protein for a dinner-time high.

Try: steak & spinach, stir-fry with chilli, peanut & chicken curry