A flexible approach that reduces carbohydrate intake to 50-130g per day while allowing a wider range of foods than strict keto. Moderate evidence supports its use for weight loss and blood sugar management.
At a glance
Moderate evidence from multiple RCTs
Numerous randomised controlled trials have examined low carb diets for weight loss. A 2023 Cochrane review and several large meta-analyses support short-to-medium-term weight loss benefits, particularly in the first 6 months. Evidence for long-term superiority over other calorie-controlled diets is mixed.
Less restrictive - 50-130g carbs vs under 20-50g
Low carb diets allow 50-130g of carbohydrates per day, while ketogenic diets typically restrict to under 20-50g to maintain nutritional ketosis. Low carb permits more vegetables, some fruit, legumes, and even small portions of whole grains, making it more sustainable for many people long-term.
May produce faster initial weight loss
Research suggests low carb diets produce greater weight loss in the first 6 months compared to low fat diets, partly due to water loss from reduced glycogen stores. By 12 months, differences tend to even out when total calorie intake is matched (Sacks 2009, Bazzano 2014).
Partially aligned with NHMRC
The NHMRC Australian Dietary Guidelines recommend whole grains and cereals as part of a balanced diet. A moderate low carb approach (100-130g/day) can still include small portions of whole grains and plenty of vegetables, making it partially compatible. Very low carb versions (under 50g) are less aligned.
Moderate - flexible and sustainable
Low carb is more flexible than keto, allowing a wider variety of foods. No strict ketone monitoring needed. Main adjustments involve reducing bread, pasta, rice, and sugary foods. Most restaurant meals can be adapted easily by swapping starchy sides for extra vegetables or salad.
The low carb diet reduces daily carbohydrate intake to roughly 50-130g per day, compared to the typical Australian intake of 200-300g. This places it between a standard balanced diet and the more restrictive ketogenic diet. The approach focuses on replacing refined carbohydrates with protein, healthy fats, and non-starchy vegetables.
Low carb eating has become one of the most popular dietary approaches in Australia for weight loss and blood sugar management. Its flexibility makes it more sustainable than stricter carbohydrate-restricted diets for many people. Research suggests it may be particularly effective for people with insulin resistance, type 2 diabetes, or metabolic syndrome, though it can be a useful weight loss tool for the general population as well.
Reducing carbohydrate intake works through several mechanisms. First, it lowers insulin levels, which may facilitate fat mobilisation from adipose tissue. Second, higher protein intake (typically 25-35% of energy) increases satiety through stimulation of GLP-1, PYY, and CCK hormones while suppressing ghrelin. Third, the thermic effect of protein (20-30% of energy consumed is used in digestion) slightly increases metabolic rate compared to a high carb diet. Fourth, eliminating refined carbohydrates and sugary foods removes some of the most calorie-dense, hyper-palatable items from the diet, often leading to a spontaneous reduction in total energy intake without deliberate calorie counting. Unlike strict keto, low carb diets do not necessarily induce sustained nutritional ketosis, though mild ketosis may occur at the lower end of the carb range.
10-25%
50-130g per day. Focus on non-starchy vegetables, some fruit, and small portions of whole grains if desired.
25-35%
Higher than standard diets. Typically 100-150g per day depending on body size and activity level.
40-60%
Emphasis on unsaturated fats (olive oil, avocado, nuts) alongside moderate saturated fat from meat and dairy.
This macronutrient range is flexible. Some people thrive closer to 50g carbs, others at 130g. Individual response varies based on activity level, insulin sensitivity, and personal preference.
The CSIRO Total Wellbeing Diet, one of Australia's most well-known research-backed diets, is essentially a moderately low carb, higher protein approach. This lends credibility to the low carb concept within the Australian nutrition landscape. The NHMRC Australian Dietary Guidelines (2013, currently under review) recommend whole grains as part of a balanced diet, so very low carb versions diverge from official advice. However, the guidelines also emphasise limiting added sugars and refined grains, which aligns with low carb principles. Australian supermarkets (Woolworths, Coles, Aldi) now stock extensive ranges of low carb products including wraps, bread alternatives, and protein-enriched foods. Accredited Practising Dietitians in Australia increasingly support moderate low carb approaches, particularly for patients with type 2 diabetes.
Low carb diets have a moderate evidence base from multiple RCTs and meta-analyses. They consistently produce weight loss comparable to or slightly greater than low fat diets in the short term (6 months). Long-term differences are less clear. Evidence is stronger for metabolic benefits in people with type 2 diabetes and insulin resistance, where low carb diets may improve HbA1c and triglyceride levels.
Bazzano LA, Hu T, Reynolds K, et al.
2014Effects of Low-Carbohydrate and Low-Fat Diets: A Randomized Trial
Annals of Internal Medicine
Finding: 148 participants randomised to low carb (under 40g/day) or low fat for 12 months. The low carb group lost significantly more weight (3.5 kg more), had greater reductions in fat mass, and improved cardiovascular risk markers including triglycerides and HDL cholesterol.
Sacks FM, Bray GA, Carey VJ, et al.
2009Comparison of Weight-Loss Diets with Different Compositions of Fat, Protein, and Carbohydrates
New England Journal of Medicine
Finding: Large RCT (811 participants) comparing four diets with different macronutrient ratios over 2 years. All groups lost similar weight when calorie intake was matched, suggesting total energy matters more than macronutrient composition for weight loss.
Sainsbury E, Kizirian NV, Partridge SR, Gill T, Colagiuri S, Gibson AA
2018Effect of dietary carbohydrate restriction on glycemic control in adults with diabetes: A systematic review and meta-analysis
Diabetes Research and Clinical Practice
Finding: Meta-analysis found low carb diets reduced HbA1c significantly more than higher carb diets at 3 and 6 months in people with type 2 diabetes. Effects were attenuated at 12 and 24 months.
Mansoor N, Vinknes KJ, Veierod MB, Retterstol K
2016Effects of low-carbohydrate diets v. low-fat diets on body weight and cardiovascular risk factors: a meta-analysis of randomised controlled trials
British Journal of Nutrition
Finding: Meta-analysis of 11 RCTs (1,369 participants) found low carb diets produced significantly greater weight loss, reduced triglycerides, and increased HDL cholesterol compared to low fat diets. LDL cholesterol was slightly higher in low carb groups.
Goldenberg JZ, Day A, Brinkworth GD, et al.
2021Efficacy and safety of low and very low carbohydrate diets for type 2 diabetes remission: systematic review and meta-analysis of published and unpublished randomized trial data
BMJ
Finding: Systematic review found low carb diets achieved higher rates of diabetes remission at 6 months compared to control diets. Benefits diminished at 12 months, highlighting the importance of long-term adherence.
Noakes TD, Windt J
2017Evidence that supports the prescription of low-carbohydrate high-fat diets: a narrative review
British Journal of Sports Medicine
Finding: Narrative review summarising evidence for LCHF diets in weight management, metabolic syndrome, and type 2 diabetes. Concluded the evidence supports low carb as a viable dietary approach, particularly for insulin-resistant individuals.
Source data from published peer-reviewed studies. Links open in a new tab to external medical databases.
Effective short-term weight loss
Multiple RCTs show low carb diets produce comparable or slightly greater weight loss than low fat diets over 6-12 months, particularly in the early phases.
Source: Bazzano 2014
May improve blood sugar control
Research suggests low carb diets can reduce HbA1c and fasting glucose in people with type 2 diabetes, potentially reducing medication requirements.
Source: Sainsbury 2018
More flexible than keto
Allowing 50-130g of carbs means you can still enjoy vegetables, berries, nuts, and even small portions of whole grains, making it more socially sustainable.
May improve triglycerides and HDL
Meta-analyses consistently show low carb diets reduce triglycerides and increase HDL (good) cholesterol, two important cardiovascular risk markers.
Source: Mansoor 2016
Reduces appetite through protein and satiety
Higher protein intake increases satiety hormones and reduces hunger, often leading to spontaneous calorie reduction without deliberate restriction.
No strict calorie counting required
Many people lose weight on low carb by simply reducing starchy and sugary foods without needing to track kilojoules, making it more practical for everyday life.
Widely supported in Australia
The CSIRO Total Wellbeing Diet is based on similar principles. Accredited Practising Dietitians increasingly recommend moderate carb restriction for metabolic health.
Important - Read Before Starting
| Day | Breakfast | Lunch | Dinner | Snacks | ~kJ |
|---|---|---|---|---|---|
| Monday | 2-egg omelette with spinach, mushroom, and feta cheese | Chicken Caesar salad (no croutons) with parmesan and olive oil dressing | 200g salmon fillet with roasted broccoli and cauliflower mash | 30g almonds, cheese stick | 7,100 kJ |
| Tuesday | Greek yoghurt with blueberries and chia seeds | Lettuce wrap burgers with beef patties, cheese, avocado, and tomato | 250g lamb cutlets with grilled zucchini and green beans | Celery sticks with cream cheese | 7,400 kJ |
| Wednesday | Scrambled eggs (3) with smoked salmon and avocado | Tuna salad with mixed leaves, cucumber, olives, and olive oil | 200g chicken thigh stir-fry with capsicum, mushrooms, and cauliflower rice | 30g macadamia nuts | 7,200 kJ |
| Thursday | Bacon and egg cups (2 eggs, 2 rashers) with sliced avocado | Zucchini noodles with beef bolognese sauce | 200g barramundi with asparagus and a side salad | Handful of walnuts, 2 squares dark chocolate | 7,000 kJ |
| Friday | Smoothie with spinach, protein powder, almond milk, and berries | Halloumi and roasted vegetable salad with pesto dressing | 250g scotch fillet steak with mushroom sauce and steamed greens | Boiled eggs (2) | 7,600 kJ |
| Saturday | Mushroom and cheese omelette with a side of avocado | Prawn and avocado salad with lime dressing | Slow-cooked lamb shoulder with roasted cauliflower and a mint yoghurt sauce | Olives and cheese plate | 7,800 kJ |
| Sunday | Eggs Benedict on portobello mushroom caps (instead of muffin) with hollandaise | Chicken and vegetable soup (no potato or pasta) | 200g kangaroo steak with sweet potato mash (small portion) and steamed broccolini | Berries with cream | 7,300 kJ |
This is a sample Low Carb Diet meal plan for illustration. Adjust portions based on your individual calorie needs. Consult an Accredited Practising Dietitian for a personalised plan.
Birds Eye or Woolworths brand
Frozen riced cauliflower is a convenient low carb swap for rice. Ready in 3 minutes in the microwave.
Aldi Baker's Life Lower Carb or Herman Brot
Low carb bread with 5-7g carbs per slice versus 15-20g in standard bread. Good for sandwiches and toast.
Cobram Estate (Australian)
Australian-made EVOO for cooking and dressings. Rich in monounsaturated fats and polyphenols.
Chobani Whole Milk or Jalna
High protein, low sugar yoghurt. Choose plain full-fat varieties and add your own berries.
Woolworths Macro or local brands
Australian-grown macadamias are high in monounsaturated fat and low in carbs. Ideal snack in 30g portions.
Slendier
Almost zero carb and zero calorie noodle alternative made from konjac root. Good for stir-fries and soups.
Calculate your current carbohydrate intake for a few days to establish a baseline - most Australians eat 200-300g per day
Set an initial target of 100-130g of carbs per day for the first 2 weeks, then adjust down to 50-100g if desired
Swap refined carbs first: replace white bread with low carb bread, white rice with cauliflower rice, pasta with zucchini noodles
Increase protein at each meal (eggs, chicken, fish, beef) to maintain satiety as carbs decrease
Stock your kitchen with low carb staples: eggs, cheese, nuts, non-starchy vegetables, olive oil, and quality meats
Drink plenty of water and consider adding a pinch of salt to water in the first week to maintain electrolyte balance
Use our macro calculator to set personalised carb, protein, and fat targets based on your body and goals
Meal prep on Sundays to avoid reaching for high carb convenience foods during busy weekdays
Track progress with weekly weigh-ins and waist measurements rather than daily scale checks
Get blood work at baseline and 3 months to monitor your response, particularly lipid panel and blood glucose
Watch out for these
Calculate the right energy deficit for steady weight loss
Open calculatorFind your total daily energy expenditure to set your baseline
Open calculatorSet personalised carb, protein, and fat targets for your low carb plan
Open calculatorTrack your BMI progress over time
Open calculatorDetermine your daily kilojoule needs for weight loss
Open calculatorGet personalised advice on the Low Carb Diet from an Accredited Practising Dietitian in your area.
Low carb diets typically allow 50-130g of carbohydrates per day, while keto restricts to under 20-50g to achieve sustained nutritional ketosis. Low carb is more flexible - you can include more vegetables, berries, nuts, and even small amounts of whole grains. Most people find low carb easier to maintain long-term because it does not require the strict carb limits or ketone monitoring of keto.
Most low carb diets target 50-130g of carbohydrates per day. A good starting point is 100g per day, then adjust based on how you feel and your results. For context, the average Australian eats 200-300g of carbs daily. Use our macro calculator to get a personalised target based on your weight, activity level, and goals.
Research suggests most people lose weight on a low carb diet, primarily because higher protein intake increases satiety and leads to spontaneous calorie reduction. RCTs show average weight loss of 5-10% of body weight over 6-12 months (Bazzano 2014). Initial losses in the first 1-2 weeks include significant water weight from depleted glycogen stores.
Moderate low carb diets (80-130g carbs/day) appear safe for most healthy adults based on available research. The CSIRO Total Wellbeing Diet uses similar principles and is considered safe. Very low carb diets (under 50g) have less long-term safety data. People with kidney disease, liver conditions, or a history of eating disorders should consult their GP or Accredited Practising Dietitian first.
Common initial side effects in the first 1-2 weeks include fatigue, headaches, irritability, and constipation as your body adapts. These are sometimes called "low carb flu" and usually resolve. Ensuring adequate water, electrolytes (sodium, potassium, magnesium), and fibre from vegetables helps minimise symptoms.
Yes, in moderation. Berries are the best choice - strawberries (6g carbs per 100g), blueberries (12g), and raspberries (5g) are relatively low in carbs and high in fibre and antioxidants. Avocado is also technically a fruit and very low carb. Limit tropical fruits like bananas (23g per 100g), mangoes, and grapes, which are higher in sugar.
Research suggests low carb diets may improve blood sugar control and reduce HbA1c in people with type 2 diabetes (Sainsbury 2018, Goldenberg 2021). However, if you take blood sugar-lowering medications, doses may need adjustment to prevent hypoglycaemia. Always work with your GP or endocrinologist when changing your diet alongside diabetes medication.
Yes. Budget-friendly low carb staples include eggs ($5-8/dozen), frozen vegetables ($2-3/kg), tinned tuna ($1-2/tin), chicken thighs ($6-10/kg), cheese ($8-12/kg), and seasonal fresh vegetables. Buying meat in bulk from butchers or on special at Coles and Woolworths helps. A low carb diet can cost $70-100/week per person.
This website is for informational and research purposes only.
We are not medical professionals and nothing on this page constitutes medical advice, diagnosis, or treatment. Always consult a qualified doctor, Accredited Practising Dietitian, or specialist before making any changes to your diet.
The information on this page is based on published peer-reviewed research and Australian dietary guidelines. Individual results may vary. Data sourced from the NHMRC, Dietitians Australia, and published clinical studies. Last reviewed 2026-04-12.