Recent independent testing by Consumer Reports  found measurable amounts of lead and other heavy metals in several popular protein powders - in fact, more than in their last round of testing carried out a decade ago. And, plant-based protein powders seem more likely to have high lead levels.

Worrying right? We thought it was a good time to pause and take stock.

At Fuel My Potential, we often hear:

Do I actually need a protein supplement, or does my usual diet provide enough?

If I do need more, how much and when?

Usually the answer is simple: Most people can meet their protein needs through food - safely, effectively, with far greater benefit.

Protein: An important part of the picture

Protein is one of three major macronutrients that provide energy. It's essential for building and repairing muscle, supporting immunity, transporting nutrients like iron, and making hormones and enzymes that drive every process in your body. 

Think of protein as the timber in a house - necessary for the structure, but not enough on its own. To build a strong, functioning body you also need: 

• Iron, zinc, B-vitamins and folate - for oxygen delivery and cell repair
• Omega-3 fats and antioxidants - to manage inflammation and aid recovery
• Calcium and Vitamin D - to strengthen bones and optimise muscle function
• Carbohydrate - to fuel our body at rest and during exercise, and to ensure you don't use your muscle protein as fuel

Protein powders provide the "timber", but real foods bring all the materials you need to build the whole house.

So, how much protein do you really need?

Protein recommendations vary slightly around the world, but most people Western countries already eat more than enough.

As a general guide:

• General population: 0.8–1.0 g per kg body weight per day. Older adults might need over 1.0 g per kg body weight per day, and that needs to be combined with resistance training to protect muscle mass.
  
  
• Active individuals: 1.2–1.5 g per kg body weight per day.
  
  

• Athletes with specific goals: occasionally higher, under professional guidance.

Let's pop that into a Table for easy reference based on your own body weight:

In the Western world, most people eat more than enough protein, although poverty and dietary choices  (for example veganism) can make it more challenging. However, with good understanding, advice and planning, it is entirely possible to meet protein needs on a vegan diet without supplements.

Real-food protein sources do it better

We tend to label foods by their dominant nutrient, e.g. chicken is  'protein' or dairy is 'protein'. And yes, while those foods are good sources of protein, many other unexpected corners of the foodiverse  also provide protein for you.

For example:

• One slice of wholegrain bread = ~3.5g protein
• One white pita bread = ~5g protein
• One cup of cooked pasta = ~8g protein
• Half a cup of heated from frozen edamame beans = ~10g protein
• Half a cup of cooked frozen peas = ~4g protein
• Half a can of Lite Baked beans = ~9g protein
• Half a can of Lite Baked Beans on 2 slices light multigrain toast with 20g Edam cheese = ~21g or more protein (+11g fibre)

As you can see, protein is spread widely across many foods - not just in meat, eggs, or protein bars and powders.

Her's a snapstho fo how different protein-rich foods contribute more than just protein:

References: Mann & Truswell, Essentials of Human Nutrition; Soriano-Santos, Chemical Composition and Nutritional Content of Raw Poultry Meat. 

Newsflash: Protein shakes aren't calorie free

Gram for gram, protein and carbohydrate provide roughly the same energy - about 17 kJ (4 Calories).

That means:

• 20g whey protein isolate powder = ~78 Calories, or 328 kJ; before you add milk or anything else.
• 20g table sugar = ~81 Calories, or 340 kJ. 

There is little difference in calorie content between the two. They are both highly processed, refined foods, providing one macronutrient and very few vitamins or minerals, with no fibre. You are much better off to choose less refined and more nutrient-dense real foods supplying carbohydrates or protein, or even better - both!

If your goal is body fat loss, it would pay to focus less on 'high protein' labels and more on nutrient-dense, lower-calorie real foods. They'll do better to help you get whole body results - trust us, we speak from experience working with thousands of clients wanting the same thing you do.

Nutrition for building muscle

Protein is often seen as the holy grain of building muscle. But, you can't gain muscle just by eating more protein. You need to start with the right training stimulus and recovery (sleep) first. Consistent resistance training and good sleep are non-negotiable. Nutrition, not just protein, becomes the next building block to optimise muscle mass and/or strength.

Once you have your training and sleep dialled in, these nutrition strategies will help you optimise your results:

1. Eat enough total energy - if you are overly restricting energy intake, it will be very difficult to gain muscle mass. If you are trying to gain muscle mass and reduce body fat at the same time, get personalised advice from a Sports Dietitian/Nutritionist - you'll progress faster and more safely.
2. Prioritise carbohydrate - it fuels your training and preserves the protein you do eat so it can go into building muscle and repairing your body.
3. Include protein at every meal or snack - generally 25 to 30g protein at three meals and 1-2 snacks, depending on your goals. Eating more protein from food at dinner is quite common and fine to do. 
4. Fuel around training - eat a carb+protein snack 1-2 hours before, and within 30 mins of finishing exercise. You may be in the habit of eating the protein and avoiding the carbs, don't do that! To refuel your muscle and get better responses to training, you want to replenish those muscle carbohydrate fuel stores.
5. Be consistent - think of missing meals or recovery snacks as being like missing a training session, it can set your progress back.

Still want to use protein powder?

Protein powders are a very easy, transportable source of protein that tastes good. they are convenient! So as suggested by Consumer Reports, you could still consume them from time to time - but maybe not on the daily. Treat them as supplementary to your diet, not part of the foundation.

Here are our top tips for choosing wisely:

1. Understand dietary supplements are poorly regulated. Unlike pharmaceuticals and medicines, there isn't nearly the same oversight of production, safety and whether the ingredients match what is (or isn't) declared on the supplement label. Plus, dietary supplements do not have to prove that they work via rigourous clinical trials either.
2. Check the country of origin for ingredients, particularly for plant and bone broth protein powders. We'll give a shout out to New Zealand sourced dairy here, as our cows are grazed outdoors on grass all year for milking. We also tend to avoid any product where the label states 'proprietary blend' as that doesn't provide visibility of the ingredients in them.
3. Look, or ask for, Certificates of Analysis (CoA) to confirm that the product is tested for heavy metals and other possible contaminants. 
4. Confirm independent testing. Check whether Certificates of Analysis are provided by an independent laboratory. Many supplement manufacturers will say that their suppliers provide certification - have you seen it? Has the manufacturer double checked their products themselves also?
5. Check it is batch-tested. If you compete in your sport that does anti-doping testing, check that the product is also screened for World Anti-Doping Agency (WADA) Prohibited Substances through an independent programme (eg. NSF for Sport, Informed Sport or HASTA). This is a separate process to food safety or ingredients analysis. Many supplements have undeclared WADA prohibited substances in them, so again, check with your Sports Dietitian/Nutritionist before using any supplements.

Still unsure? Make your own DIY Protein Powder or Recovery Smoothie instead. Check out the recipes below.  

Bottom line

It seems that protein powder manufacturing still faces challenges around heavy metal content.

While protein is crucial for building, maintaining and repairing muscle and other tissues, how you get it matters.  Real food protein sources supply the protein you need plus vitamins, minerals and energy to support lasting training adaptations, performance and health.

Supplements can have their place, but get good advice from a Sports Dietitian/Nutritionist before you use them. Most of us won't be selling you the supplement, just giving you unbiased advice. That's an investment worth paying for.

Focus on balanced meals, steady training, good sleep and recovery.

That's the smarter and safer way to fuel your potential, in sport, work and life.

Next steps

Don't just read about smarter nutrition - put it into action:

• Get our FREE Performance Fuel Favs e-book - 10 of our athlete's favourite quick, nutrient-packed recipes.
• Complete our Eat Like an Athlete Course – your step-by-step roadmap to understanding how athletes get the nutrition basics right, so you can meet your own protein and energy needs with real food.
• Get the complete Performance Fuel Recipe e-book – 50+ quick, nutrient-dense meal ideas that fill you up with goodness.
• Work 1 : 1 with our experienced nutrition team – personalised coaching for active youth, mums, dads and anyone in-between, through to development, elite and professional athletes.

Start now. Invest in great advice - you'll feel the difference and never look back.

About Fuel My Potential

At Fuel My Potential, we help active people and athletes get the most out of sport, study, work and life - focusing on thriving, not dieting. 

Our team of experience performance nutritionists and dietitians bring together science and real-world experience to help you make confident, informed choices about how you fuel your body.

For more information on sports nutrition, follow us on socials @fuelmypotential or join one of our courses or programmes at www.fuelmypotential.com 

We also offer individual support to any active person at any level of competition (or not); package details are available here.