It is a warning that has been sounded time and again, but is often ignored.

Whenever anyone is considering trying a new diet plan, they should consult their doctor or a professional dietitian before they begin a weight-loss programme.

Nutrition services' Mellonie Barnum urged the public to take certain precautions before entering the world of dieting and exercising.

"If you have a medical condition and have been instructed on a special diet from a registered dietitian, then that diet plan is best for you,'' she explained. "A registered dietitian will assess your medical and nutritional needs and individualise your diet for you.'' But if you do not have a special medical condition, Ms Barnum still recommends asking the following questions as to whether a diet is right for you: Is the diet balanced? A diet is balanced if it contains all the food groups to sustain your metabolic needs daily. Diets that promote one food group and exclude others are not balanced.

"An example of this is the diet that promotes a high protein intake from meats to the exclusion of carbohydrates from starches, fruits and vegetables,'' said Ms Barnum. "This diet allows you to lose weight, but the cost is your health.

"Choose a diet plan that is healthy.'' Is variety in the diet plan? Variety is important because within a food group, some foods are better sources of nutrients that others. Variety will ensure you are getting all the nutrients you need.

"Diets that promote one food from a food group can become monotonous and boring after a while,'' warned Ms Barnum.

Does the diet plan promote moderation? You need to get enough nutrients while not getting too many calories, sodium or fat.

"One of the easiest ways to practice moderation is by eating foods in the serving sizes necessary for your age, activity and gender needs,'' Ms Barnum advised. "Practising moderation while dieting will assist you to practice moderation for life.'' Once you have selected a diet plan that is right for you, don't forget the important role exercise plays in the weight-loss process.

"Aerobic exercise is important to get your heart rate going and increase your metabolism,'' Ms Barnum explained. "In order to be effective, do aerobic activity for at least 20 to 30 minutes a minimum of three times a week.

"Anaerobic exercise is also important too,'' she added. "Anaerobic exercise builds muscle which keeps your metabolism high.

"And before you begin, ensure that you have the consent of your medical professional. Medical conditions may have some restrictions in exercise.'' For more information or a copy of the Bermuda Guide for Daily Food Choices 239-3566 or 239-3567.