What is it?
Californian physician Dr Steven Pratt came up with this diet, based on the principle that there are 14 "super foods" which can supposedly prevent chronic diseases and slow down the ageing process. Dr Pratt devised a list of the 14 food groups, reasoning that the more you eat of them, the healthier you'll probably be. In turn, Dr Pratt says the program will result in rapid weight loss, increased energy levels, improved health and radiant skin.

The "Super Foods"
1. Blueberries
Other sources: cranberries, boysenberries, strawberries, currants, blackberries, cherries
Benefits: May lower the risk of cardiovascular disease and a number of cancers, and promote brain function.
Recommended Portion: 1-2 handfuls per day

2. Walnuts
Other sources: other nuts
Benefits: May help reduce coronary heart disease, diabetes and caner.
Recommended Portion: 28g portions five times per week

3. Pumpkin
Other sources: Carrots, squash, sweet potatoes, capsisum
Benefits: May lower the risk of lung, colon, bladder and breast cancer, and it's good for the skin.
Recommended Portion: Half a handful per day

4. Wild Salmon
Other sources: Sardines, herring, trout, oysters, clams
Benefits: May prevent heart disease due to omega-3 acids. May also aid depression, arthritis and Alzheimer's disease.
Recommended Portion: Eat 2-4 times per week

5. Soy
Other sources: Tofu, soy milk
Benefits: May prevent heart disease, osteoporosis and cancer, and relieve menopausal symptoms.
Recommended Portion: 15g per day

6. Tea
Other sources: None
Benefits: Black tea in particular may boost the immune system, lower the risk of stroke and may prevent osteoporosis.
Recommended Portion: 1 or more cups per day

7. Kidney Beans
Other sources: None
Benefits: May lower cholesterol, fight heart disease and relieve hypertension.
Recommended Portion: 4 handfuls per week

8. Yoghurt
Other sources: None
Benefits: Promotes strong bones and a healthy heart.
Recommended Portion: 2 cups per day

9. Oats
Other sources: Brown rise, couscous
Benefits: May lower cholesterol, reduce heart disease and prevent type 2 diabetes
Recommended portion: 6 servings per day

10. Broccoli
Other sources: Brussels sprouts, cabbage, cauliflower
Benefits: May prevent cancer, birth defects, boost the immune system and build bones.
Recommended Portion: 1 handful per day

11. Tomatoes
Other sources: Watermelon, pink grapefruit
Benefits: Boosts the skin's SPF and prevent cataracts and cancer (especially prostate)
Recommended Portion: 1 serving per day

12. Oranges
Other sources: Grapefruit, tangerines
Benefits: May prevent heart disease, cancer, stroke and diabetes
Recommended Portion: 1 serving per day

13. Turkey
Other sources: Skinless chicken breast
Benefits: May help boost the immune system
Recommended Portion: 3 x 115g servings per week

14. Spinach
Other sources: Turnips, lettuce
Benefits: May prevent heart disease and cancer
Recommended Portion: 1 handful steamed spinach or 2 handfuls raw per day