But selecting any old meal plan could prove disastrous, setting off strange reactions in your body and making it more tempting than ever to quit and reach for that bar of chocolate.
Shaun T, host of American ABC show My Diet Is Better Than Yours, has summed up the top five warning signs your diet isn't right for you on Shape.com.
1. You're not enjoying it
Eating is supposed to be fun, and while eating kale might not be as exciting as crisps, you shouldn't be dreading mealtimes. It's important to find a diet that is sustainable in the long term, which means including at least some foods you look forward to eating.
2. You're bloated
This is a sure-fire sign the food your eating doesn't agree with you. If you're experiencing gut-related issues like pain and bloating, start cutting out certain foods to help eliminate the ones that set you off. If the symptoms don't subside, see a doctor.
3. You're tired
Food is fuel! It should keep you energised and help you get through the day, including regular exercise. It's normal to experience some tiredness after cutting our sugar and/or caffeine, but if the sluggishness persists, you haven't found the right diet.
4. You're moody/hangry
If you're constantly hungry and/or experiencing mood swings, it could be that the food or portions aren't quite right for you. Diets should positively impact your life, not mean you snap at everyone around you!
5. You aren't losing weight
If you've stuck to the diet properly and been working out regularly for 10 days, you should start to see results. If you haven't lost any weight in this timeframe, you need to reassess.
The most important thing is not to feel rushed when picking a diet. You might feel the pressure is on, but it's much more effective to find a meal plan you can stick to long term than a crash diet that will end in failure. If you need help, seek the advice of a nutritionist.
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