How Much Protein Do You Actually Need Per Day?

Regular resistance training changes the picture.

The International Society of Sports Nutrition (ISSN) published a position stand recommending approximately 1.4 to 2.0g of protein per kilogram of body weight daily for most healthy exercising individuals looking to support muscle mass.

This is a sports-nutrition recommendation rather than the general-population reference intake.

Here's how the two approaches compare.

There are several interesting things about this comparison.

First, protein isn't exclusively found in meat or specialist sports products.

Oats, beans, milk and yoghurt all contribute.

Second, the quantities you actually consume can change the picture.

A food containing 10g of protein per 100g supplies 20g when you eat 200g.

Third, protein content is not the only thing worth considering.

The chickpeas also provide fibre.

Milk provides calcium.

Oats provide wholegrain carbohydrate and fibre.

Cottage cheese provides protein but can also contain meaningful amounts of saturated fat, depending on the formulation.

Each food contributes different nutrients.

1. Flahavan's Organic Porridge Oats

Waterford-based Flahavan's lists approximately 11g of protein per 100g in its Organic Porridge Oats.

A typical 40g dry serving provides approximately 4.5g.

That might not sound particularly impressive next to a protein bar.

But oats also provide fibre, complex carbohydrate and other nutrients.

And most people don't eat them entirely on their own.

Prepare that 40g portion with 200ml of Avonmore whole milk and the combination provides approximately:

4.5g + 6.8g = 11.3g protein.

That's before adding nuts, seeds or other toppings.

It's a reminder that the protein in a meal often comes from several ingredients.

2. Glenisk Natural Fat Free Protein Yoghurt

The Glenisk Natural Fat Free Protein Yoghurt contains 10g of protein per 100g.

A 150g portion therefore provides approximately 15g.

A 200g portion provides approximately 20g.

The ingredient list is particularly straightforward:

Skimmed milk and live yoghurt cultures.

The product contains 3.5g of sugars per 100g, according to its published label.

Those sugars occur naturally in the milk, rather than being added table sugar.

This makes it an interesting example of a high-protein food that doesn't require an extensive list of additional protein concentrates, flavours or sweeteners.

That doesn't establish that every Glenisk product has the same nutritional profile.

Different flavours and formulations can vary.

3. Tesco Chickpeas in Water

Tesco's tinned chickpeas contain 7.8g of protein per 100g drained.

A 120g serving provides approximately 9.4g.

But protein isn't their only nutritional advantage.

They also contain 5.2g of fibre per 100g.

That's approximately 6.2g of fibre in a 120g portion.

So the chickpeas provide both protein and fibre, alongside carbohydrate and other nutrients.

They're a useful example of why foods should not be ranked solely according to which provides the most protein.

A tin of chickpeas and a protein shake serve different purposes.

One isn't automatically superior to the other.

4. Avonmore Fresh Whole Milk

A 200ml glass of Avonmore whole milk contains 6.8g of protein.

It also contains calcium, vitamin B12 and naturally occurring lactose.

The same serving provides approximately 4.4g of saturated fat, according to the product label.

Someone prioritising lower saturated fat might choose a lower-fat milk instead.

The important point is that protein needs to be considered alongside the rest of the food's nutritional characteristics.

5. Glenisk Luxury High Protein Cottage Cheese

Glenisk's Luxury High Protein Cottage Cheese contains 12.6g of protein per 100g.

Its 320g pot is advertised as containing approximately 40g of protein in total.

That sounds impressive.

But there's a considerable difference between a 100g portion and consuming the complete 320g pot.

The product also contains 4.7g of saturated fat per 100g.

Again, that doesn't automatically make it a poor choice.

It means the portion size and complete nutritional profile matter.

Not necessarily.

Protein powders and ready-to-drink shakes can be convenient, particularly for people who struggle to meet higher protein requirements through ordinary meals.

But there is no general requirement for healthy adults to consume protein supplements.

Food sources can provide the protein that many people need.

The HSE's healthy-eating guidance recommends a varied diet containing foods such as milk, yoghurt, fish, lean meat, eggs, beans and nuts.

That variety also helps supply nutrients beyond protein.

A protein powder, by comparison, may be designed primarily to provide protein efficiently.

That can be useful in some circumstances.

But convenience is not the same as necessity.

When might protein supplements be useful?

Some people may find them practical because of:

• Higher protein needs associated with demanding exercise.
• Limited opportunities to prepare food.
• Difficulty consuming enough protein through normal meals.
• Particular dietary preferences.
• A specific recommendation from a qualified healthcare professional.

But a scoop containing 25g of protein isn't automatically better than a meal providing a similar amount.

The rest of the diet still matters.

And when choosing supplements, it is important to check the ingredients, serving information and suitability for individual circumstances.

You'll often hear that protein must be consumed immediately after exercise.

The evidence is more nuanced.

The ISSN identifies total daily protein intake as an important factor in supporting muscle growth and maintenance in exercising individuals.

Consuming protein around exercise can be helpful, but the idea that everyone has only a very short window in which protein can be used effectively is an oversimplification.

For healthy people undertaking resistance training, distributing protein across meals can be a practical strategy.

The ISSN's position stand discusses approximate protein doses of 20–40g per eating occasion for many exercising individuals, depending on body size, age and other factors.

That isn't a compulsory amount for every meal.

It also isn't a recommendation that everyone must eat four or five separate protein-heavy meals.

People who are less active, older, pregnant, recovering from illness or managing medical conditions may have different considerations.

The sensible approach is to focus on an appropriate daily intake before worrying about whether a protein snack is consumed at an exact time.

Maintaining muscle is important throughout adulthood, but it becomes especially relevant with age.

Muscle mass and strength can decline over time, and adequate nutrition alongside appropriate physical activity can help support muscle health.

EFSA's general population reference intake includes older adults.

However, other clinical and nutritional guidance sometimes recommends higher protein intakes for older people, depending on health, activity and nutritional status.

The HSE's healthy-eating guidance for older adults encourages including protein-rich foods in at least two meals each day.

Examples include fish, eggs, meat, beans, lentils and nuts.

For someone experiencing unintentional weight loss, reduced appetite, frailty or difficulty eating, individual assessment matters much more than applying a generic figure from the internet.

The same applies to people with kidney disease or other conditions that may require adjustments to protein intake.

In those circumstances, advice should come from an appropriately qualified healthcare professional.

The nutrition component considers protein alongside characteristics such as fibre, sugars, energy, saturated fat and salt.

The ingredients component looks at the declared formulation, including relevant additives.

Processing and quality signals form the remaining part of the assessment.

Additional category-specific rules and score limits apply.

Importantly, the published methodology does not allow a product to compensate indefinitely for unfavourable nutritional characteristics simply by adding more protein.

That means a high-protein snack isn't automatically guaranteed an Excellent Sláinte Score.

And plain foods containing moderate protein can still have strong overall nutritional profiles.

We haven't assigned scores to the foods compared in this article. Exact scores depend on their verified product records and the current Sláinte scoring engine.

You can read the full Sláinte methodology.

Scan your next high-protein product with Sláinte to explore its nutrition, ingredients and available alternatives.