Walk into any gym in Australia and everyone has a different answer. Your personal trainer says 2 grams per kilogram. The guy at the supplement store says 3. Your mate who has been lifting for six months says just eat chicken and eggs and you will be fine. The truth is simpler than the industry wants you to believe — and the numbers are probably different from what you have been told.
The Short Answer
For a sedentary adult, the minimum recommended daily intake is 0.8 grams of protein per kilogram of bodyweight. But if you train regularly — gym, sport, martial arts, running — that number goes up significantly. The current evidence for active adults points to:
● 1.6 – 2.2g per kg of bodyweight for people training 3–5 times per week
● Up to 2.4g per kg for strength and power athletes in heavy training blocks
● 1.2 – 1.6g per kg for endurance athletes (runners, cyclists, swimmers)
So if you weigh 80kg and train four times a week, you are looking at roughly 128–176 grams of protein per day. That is a real number. Most people are not hitting it.
Why Protein Matters Beyond Just Building Muscle
Recovery
Training breaks muscle tissue down. Protein is what rebuilds it. Without enough, recovery slows, soreness lasts longer, and your next session suffers before it even starts.
Satiety and Body Composition
Protein is the most satiating macronutrient. Gram for gram, it keeps you fuller for longer than carbohydrates or fat. If you are trying to manage your weight while maintaining performance, protein is the lever that makes everything else easier.
Immune Function and Hormonal Health
Antibodies, enzymes, and many hormones are built from amino acids — the building blocks of protein. Chronically low protein intake compromises your immune system and affects hormonal balance, even if you feel fine in the short term.
The Formula
The formula is straightforward. Take your bodyweight in kilograms and multiply by 1.8. That gives you a solid daily protein target for most active Australians. If you train hard or are specifically building muscle, use 2.0–2.2 as your multiplier.
Example: 75kg × 1.8 = 135 grams of protein per day.
That target then needs to be spread across meals and snacks — not consumed all at once.
Research consistently shows that muscle protein synthesis is maximised when protein is distributed across 3–5 eating occasions per day, with 25–40 grams per sitting.
Where Most Australians Are Going Wrong
Front-loading protein at dinner
The classic Australian eating pattern — light breakfast, average lunch, large protein-heavy dinner — is the least effective way to distribute protein for muscle synthesis and recovery. Your body can only utilise so much protein at once for muscle building. Spread it out.
Ignoring protein quality
Not all protein sources are equal. Complete proteins — those containing all nine essential amino acids — are found in animal products (meat, fish, eggs, dairy) and a handful of plant sources (soy, quinoa). If you are building your intake primarily from incomplete sources, you may be hitting your gram target without getting the amino acid profile your body actually needs.
Practical Ways to Hit Your Target Every Day
● Anchor protein at every meal — aim for 30–40g at breakfast, lunch, and dinner
● Use protein-dense snacks strategically — a quality protein bar between meals or posttraining covers 15–20g without preparation time
● Track for two weeks, then stop — once you know what 35g of protein at breakfast looks like, you do not need an app to tell you anymore
● Do not overthink individual days — weekly average matters more than any single meal
FREQUENTLY ASKED QUESTIONS
How much protein per day do I need to build muscle in Australia?
To build muscle effectively, most active Australians training 3–5 times per week should aim for 1.6–2.2 grams of protein per kilogram of bodyweight daily. For an 80kg person, this means 128–176 grams spread across 3–5 meals and snacks throughout the day.
Can you eat too much protein?
For most healthy adults, consuming up to 2.5g per kg of bodyweight daily is considered safe. Extremely high intakes above 3g/kg are unnecessary for most people and may put extra load on the kidneys — primarily a concern for those with pre-existing kidney conditions.
Is 100g of protein a day enough?
It depends on your bodyweight and training volume. For a 60kg person training moderately, 100g is close to adequate. For an 80–90kg person who trains hard, 100g is likely not enough. Use bodyweight × 1.6–2.0 to find your personal target.
Do protein bars count toward my daily protein intake?
Yes. A quality protein bar with 15–20g of protein counts the same as any other dietary protein source. Choose bars that derive their protein count from complete protein sources and do not use sugar alcohols or low-quality fillers.
Do protein bars have enough protein to be worth it?
Quality protein bars — those containing 15–20g of complete protein — are absolutely worth it as a protein source. Bars with under 10g of protein or bars where the protein count includes collagen (an incomplete protein) are less effective.
