Excerpts from an article by Dr. Alan Barclay BSc. GradDip, PhD (Chief Scientific Officer – Glycemic Index Foundation) Conquest (The official magazine of Diabetes Australia), Summer 2011 (December Edition), pp24 – 25.
Before even thinking about dieting, consider some basic principles about weight control first.
We all know that losing weight and then maintaining that weight loss is not easy, particularly if we take the perspective of “going on a diet” for a short period of time to lose a few kilos. Before long, we almost inevitably find ourselves going back to our old lifestyles that put the weight on in the first place. Whatever the latest fad diet is – be it the low carbohydrate, low sugar, low fructose, low fat, blood type etc – the truth is that, in the long run, chances are you won’t be able to stick to it due to overwhelming feelings of hunger, boredom, inconvenience or the fact that it clashes with your deeply ingrained familial and cultural beleifs. The bottom line is that in the long run, “diets” don’t work.
WHAT HAS BEEN PROVEN TO WORK?

Eat your way to weight loss with fruit and veg!!
In order to successfully lose weight and keep it off you basically have to eat and drink less and move more – sounds so simple, doesn’t it? The devil is in the detail, of course. Making small sustainable changes to your lifestyle that do not dramatically change the types of food you like, don’t cost too much, and don’t take up too much of your valuable time are the best way to go. Your weight loss goals should also be realistic.
WHAT’S REALISTIC WEIGHT LOSS?
0.5 – 1.0kg of weight loss per week is optimal – that way it’s fat that you are losing, not water, muscle, organ or bone.
SO WHAT NEEDS TO BE DONE?
1/ SWAP IT, DON’T STOP IT
Rather than buying the latest diet book and taking on a completely alien eating plan, take a good look at your current diet and see how you can make a few sustainable changes that will not ruin your family and/or social life, nor cost you a bomb. The “Swap it, don’t stop it” approach works best in the long run – prohibition has never proven successful.
2/ EAT AND DRINK FEWER KILOJOULES
The average Australian man consumes about 10,000 kilojoules (kJ) each day, and the average woman consumes about 8000kJ/day. To lose around 0.5kg of body fat per week, you need to eat around 2000kJ a day less, or consume about 25% less kJ each day. This can be achieved by swapping to lower kJ versions of your favourite foods or just eat smaller portions (or both).
3/ WATCH WHAT YOU DRINK
Soft drinks, fruit juices and alcohol are all concentrated sources of kJ, so to lose weight you should limit them as much as possible.
Eating vegetables and fruit can help you lose weight.
Excerpts from an article by Claire Sullivan, BSc, Adv Dip HSc (Nat), Grad Dip DD – Research and Development Manager Health World Australia Metagenics Update, December 2011/January 2012, p5
Optimising phytochemical intake may be a useful strategy to enhance results in weight reduction programs according to a joint research project from the University of Florida and the University of Virginia.
Phytochemcials are bioactive compounds present in plants – consuming a diet high in these phytochemicals “move our cells into a protective state”. Whereas a diet lacking these phytochemicals “moves” our cells toward dysfunction.
Today’s diets are frequently deficient in the fruit, vegetables and plant based foods that are a source of phytochemicals, and this research examined the relationship between phytochemical intake and weight gain and inflammation.
The researchers recruited 54 men and women aged 18 – 30 who were divided into two groups based on their BMI;
- normal weight individuals – BMI < 25 kg/m2
- overweight individuals – BMI ≥ 25kg/m2
Each participant completed a three day diet diary on two separate occasions, for dietary analysis to determine the Phytochemical Index (PI) of their diet.
The researchers made some fascinating discoveries:
- Despite the difference in BMI there was no statistically significant difference in the daily calorie (kJ) intake between the two groups.
- The normal weight group had a 10.3% higher PI compared to that of the overweight group (PI values decreased progressively with increasing weight)
- Overweight and obese subjects consumed fewer servings of green leafy vegetables, green vegetables, fruits, and wholegrain breads than the normal weight subjects
- Inflammation levels were higher in the overweight group compared to the normal weight group
- Among all participants significant inverse relationships were found between dietary PI value and BMI, body weight, waist circumference, and body fat percentage.
Phytochemical consumption is known to have many health benefits. This study reveals that phytochemical intake reduces steadily as weight increases, despite total calorie (kJ) intake being equal. This indicates that in the context of weight management there are additional benefits to eating fruit and vegetables beyond the fact that they are relatively low in calories.