How Much Protein Do You Actually Need? The Truth Without the Hype

If you've spent any time in a gym or even just scrolled past a fitness post on social media, you've seen the protein conversation. Protein shakes. Protein bars. High-protein everything.

It can feel overwhelming, and for most people it raises a simple question: Do I actually need to think about this?

The short answer is yes. But probably not in the way you've been led to believe.

Here's what the evidence actually says, and how to make it work in real life.

Why Protein Matters

Protein is one of three macronutrients your body needs to function, alongside carbohydrates and fats. But it plays a role that the other two don't: it's the primary building block for muscle tissue.

Every time you train, you create tiny amounts of damage in your muscle fibers. Protein is what your body uses to repair and rebuild that tissue and over time, that process is what makes you stronger, leaner, and more capable.

Beyond muscle, protein also supports:

• Immune function

• Hormone and enzyme production

• Bone health

• Recovery from injury or illness

• Keeping you full between meals

It's not a supplement. It's a fundamental nutrient and most people aren't getting enough of it.

So How Much Do You Actually Need?

The most commonly cited figure is 0.8 grams of protein per kilogram of body weight per day. That's the official minimum recommended by most health authorities.

But here's the thing: that figure is a floor, not a target. It's designed to prevent deficiency not to support an active lifestyle, build muscle, or preserve strength as you age.

For people who exercise regularly, the research points to a higher range:

• 1.6 to 2.2 grams per kilogram of body weight per day for those actively trying to build or maintain muscle

• 1.2 to 1.6 grams per kilogram is a solid target for people exercising a few times a week without a specific muscle-building goal
  

So for a 70kg person who trains regularly, that works out to roughly 110 to 154 grams of protein a day. For most people, that's more than they're currently eating.

It Matters Even More as You Get Older

This is the part that doesn't get talked about enough.

From around age 40 onwards, the body becomes gradually less efficient at using dietary protein to build and repair muscle. This process called anabolic resistance, means older adults need more protein, not less, to get the same muscle-building response as a younger person.

Research suggests people over 50 may benefit from protein intakes at the higher end of the range, spread consistently across the day. Rather than eating most of your protein at dinner, aim to distribute it across breakfast, lunch, and dinner.

If you're taking part in strength training which, for all the reasons covered in our Strength Training Over 50 post, you absolutely should be, adequate protein isn't optional. It's what makes the training actually work.

Where to Get It

You don't need a supplement to hit your protein targets. Whole food sources are always the best starting point.

Animal-based sources (complete proteins):

• Chicken breast — approx. 31g per 100g

• Canned tuna — approx. 25g per 100g

• Eggs — approx. 6g per egg

• Greek yoghurt — approx. 10g per 100g

• Cottage cheese — approx. 11g per 100g

• Beef mince — approx. 26g per 100g

Plant-based sources:

• Lentils — approx. 9g per 100g cooked

• Chickpeas — approx. 8g per 100g cooked

• Tofu — approx. 8g per 100g

• Edamame — approx. 11g per 100g

• Tempeh — approx. 19g per 100g

The main difference between animal and plant sources is that most plant proteins are incomplete — meaning they don't contain all essential amino acids in the right ratios. This doesn't mean plant-based eaters can't hit their protein targets, but it does mean eating a wider variety of sources matters.

What About Protein Supplements?

Protein powder is simply a convenient, concentrated source of protein. It's not magic, it's not dangerous, and it's not essential.

If you're consistently hitting your daily protein target through whole foods, great. You don't need it.

If you're finding it hard to reach your targets through meals alone, a protein shake made with water or milk is a practical top-up. Whey protein (derived from dairy) is the most well-researched option. Pea or rice protein blends are good options for those avoiding dairy.

One thing worth noting: supplements are not regulated the same way food is in New Zealand. If you're choosing a supplement, look for products that carry third-party testing certification.

Practical Tips to Eat More Protein

If you're currently under-eating protein, here's how to shift that without overhauling your entire diet:

Start with breakfast. Most people eat a low-protein breakfast — toast, cereal, or fruit. Swapping to eggs, Greek yoghurt, or a protein-based smoothie is the single easiest way to increase your daily total.

Build every meal around a protein source. Rather than adding protein as an afterthought, decide on your protein first and build the rest of the meal around it.

Keep easy options in the fridge. Boiled eggs, cooked chicken, cottage cheese, and canned fish are all quick, high-protein options that require almost no preparation.

Don't forget snacks. Greek yoghurt, a handful of nuts with a boiled egg, or hummus and vege sticks with some cheese all add up.

Track for a week. You don't need to count calories forever, but spending a week tracking your protein intake can be genuinely eye-opening. Most people are surprised by how far below target they actually sit.

Does Eating More Protein Cause Any Problems?

For healthy adults, higher protein intakes are well-tolerated and safe. The long-standing concern about protein damaging kidneys has not been supported by research in people with normal kidney function.

That said, if you have existing kidney disease or any relevant medical condition, it's worth discussing dietary changes with your GP or a registered dietitian before making significant increases.

Key Takeaways

• The official minimum of 0.8g/kg is a floor for deficiency prevention, not a target for active people.

• Most people who exercise regularly benefit from 1.6 to 2.2g of protein per kilogram of body weight per day.

• Protein needs increase with age, especially for people over 50.

• Whole food sources are always the best starting point; supplements are a practical top-up if needed.

• Distributing protein across all three meals is more effective than loading it into one.

• Small, practical habits, protein-first breakfast, easy fridge options make hitting targets manageable

Explore More on the Keep Fit Matakana Blog

• Strength Training Over 50: Why It's Never Too Late to Start Lifting

• Why Your Wellness Age Matters More Than Your Weight

• Is Personal Training Worth It?

Justin, Keep Fit Matakana 📍 Matakana Village, Auckland | keepfitmatakana.co.nz

Follow us on Instagram @keepfitmatakana for weekly fitness tips, class updates, and a look inside the gym.