Nutrition Basics for Weight Management

Why Nutrition Matters in Weight Management

No medication or surgery replaces the foundation of good nutrition. Whether you are pursuing lifestyle changes alone, using weight loss medications, or recovering from bariatric surgery, understanding core nutrition principles helps you make better daily decisions and sustain your results long term.

This guide provides practical, evidence-based principles — not a rigid diet plan. For a personalised eating plan tailored to your medical history and goals, Dr Chong can refer you to an Accredited Practising Dietitian (APD).

Prioritise Protein at Every Meal

Protein is the most important macronutrient for weight management. It:

• Reduces hunger by suppressing appetite hormones (ghrelin)
• Keeps you fuller for longer compared to carbohydrates or fat
• Preserves lean muscle mass during weight loss (critical for maintaining metabolic rate)
• Has a higher thermic effect — your body burns more energy digesting protein than other nutrients

High-protein foods to include regularly:

• Lean meat: chicken breast, turkey, lean beef, pork fillet
• Fish and seafood: salmon, tuna, barramundi, prawns
• Eggs and egg whites
• Low-fat dairy: Greek yoghurt, cottage cheese, skim milk
• Legumes: lentils, chickpeas, black beans, edamame
• Tofu and tempeh

Target: Aim for protein at every meal and snack. A general starting target is 1.2–1.5 g of protein per kilogram of body weight per day.

Understand Portion Sizes

Eating appropriate foods in excessive quantities still leads to weight gain. Learning to judge portion sizes visually is more practical and sustainable than calorie counting.

Simple visual guides (no measuring required):

• Protein (meat, fish, tofu): the size and thickness of your palm
• Cooked grains (rice, pasta, quinoa): one clenched fist
• Vegetables: fill at least half your plate — vegetables are nutrient-dense and relatively low in calories
• Healthy fats (avocado, cheese, nut butter): one thumb-sized portion
• Fruit: one medium piece or a small handful

Practical tip: Using a smaller plate (20–22 cm rather than 28–30 cm) naturally reduces portion sizes without requiring willpower or calorie counting.

Focus on Whole, Minimally Processed Foods

Ultra-processed foods — packaged snacks, fast food, soft drinks, processed meats, and most ready meals — are high in calories, low in nutrients, and engineered to override normal fullness signals.

Simple swaps:

• White bread → wholegrain or sourdough bread
• Sugary breakfast cereals → rolled oats, eggs, or Greek yoghurt
• Flavoured yoghurt → plain Greek yoghurt with fresh fruit
• Soft drinks → sparkling water with lemon, herbal tea, or black coffee
• Chips and packaged snacks → a small handful of unsalted nuts, carrot sticks with hummus

Aim for 80% of your meals to come from whole, minimally processed foods. You do not need to be perfect — sustainable improvement over time is more important than perfection.

Manage Liquid Calories

Drinks are a significant and often underestimated source of calories.

• A 600 mL bottle of regular soft drink: approximately 250 calories and 65 g sugar
• A large café latte with full-cream milk: approximately 200 calories
• A 250 mL glass of orange juice: similar sugar content to soft drink, despite the "healthy" perception
• Alcohol: 7 calories per gram — similar to fat. A standard glass of wine contains approximately 120–150 calories, and alcohol reduces inhibition, making overeating more likely

Better choices: Water, plain sparkling water, black coffee, herbal teas, and skim or plant-based milk in small amounts contain minimal calories.

Eat Slowly and Mindfully

It takes approximately 20 minutes for fullness signals to travel from your stomach to your brain. Eating too quickly means you often overeat before fullness registers.

• Sit at a table to eat — away from screens
• Take smaller bites and put cutlery down between mouthfuls
• Chew thoroughly before swallowing
• Stop eating when you feel satisfied (approximately 80% full), not stuffed

Plan and Prepare Meals in Advance

Unplanned meals almost always result in higher-calorie, lower-nutrition choices. Simple planning strategies:

• Choose your meals for the week on Sunday and shop accordingly
• Batch cook proteins at the start of the week (roasted chicken, hard-boiled eggs, lentil soup) to have ready in the refrigerator
• Keep healthy snacks visible and accessible (nuts, Greek yoghurt, cut vegetables)
• Avoid grocery shopping when hungry

How to Read a Food Label

When choosing packaged foods, focus on the following:

• Serving size — check whether nutrition information is shown per serve or per 100 g. Per 100 g is useful for comparing products.
• Saturated fat — aim for less than 3 g per 100 g
• Total sugar — aim for less than 10 g per 100 g; less than 5 g is ideal for everyday foods
• Sodium — aim for less than 400 mg per 100 g
• Ingredients list — ingredients are listed in descending order by weight. If sugar, refined flour, or hydrogenated oil appears in the first three ingredients, consider a better alternative.