Our expert says:
If the protein shake is a complete meal replacement and it does not contain all kinds of slimming gimmicks like fat burners or thermogenic agents, etc, then there you can certainly use a shake to replace a meal. Check the label of the GI-lean protein shake to see how many kJ a standard portion (1 cup or 1 glass) contains on its own when mixed with water and/or with fat-free milk. If such a serving provides less than 2100 kJ per meal then it should not cause weight gain because it would represent 1/3 of your daily energy allowance if you, as an adult woman, are trying to lose weight. To lose weight you need to basically change your lifestyle. Reduce your energy intake by eating an energy-reduced, low-fat, high-fibre diet (click on 'Diet & Nutrition' at the top of this page, then on 'Healthy Diets' and then on 'Slimming Diet' for a copy of such a diet), and increase your energy output by doing regular exercise (running, jogging, skipping, cycling, swimming, join a gym or Walk for Life). While you are on the ‘Diet & Nutrition’ site, read about every aspect of slimming (the dangers of diet pills, slimming aids, psychological aspects of slimming, etc) by also checking out the ‘Weight Loss’ section and exploring the site.
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