Does the Type of Protein Matter?

Higher-quality proteins generally supply these amino acids in amounts that closely match human needs and are digested and absorbed efficiently. Whey, one of the two proteins in milk, is among the most studied protein ingredients.

Over the past two decades, scientists studying obesity, metabolism, exercise physiology and healthy ageing have found that protein does more than help build muscle. It also plays an important role in maintaining lean body mass during weight loss, promoting satiety, supporting healthy ageing and preserving physical function throughout life (1, 2, 3, 4).

Does protein help you build muscle?

Yes. Protein is the nutrient long linked with building muscle.

For decades it was treated as something mainly for athletes and bodybuilders, and nutrition experts now discuss it as an essential nutrient for healthy ageing, weight management, exercise recovery and overall metabolic health. Strength training has become mainstream too, with doctors and public health organisations recommending resistance exercise for people of nearly every age.

How does protein help during weight loss?

It helps maintain muscle while body fat comes down. When researchers began examining what kind of weight people lost, not just how much, higher-protein diets consistently showed advantages for preserving lean body mass during weight loss (5).

Protein also takes more energy to digest than the other macronutrients, and this contributes modestly to daily energy expenditure (7).

Weight-loss specialists have shifted their focus from simply reducing body weight to improving body composition: keeping lean mass while losing fat. More recently, healthcare providers have begun encouraging people using GLP-1 medications to prioritise protein intake, to help preserve muscle as calorie intake declines.

Does protein keep you full?

It can. In research, protein-rich meals promoted greater feelings of fullness than meals emphasising carbohydrates or fat, in part because protein stimulates hormones involved in satiety while suppressing hunger signals (6).

Researchers studying appetite looked beyond calories to how each macronutrient influences hunger and satiety, and protein emerged again and again as an important part of the answer.

Do older adults need more protein?

Research has shown that older adults often benefit from consuming more high-quality protein than younger adults, because ageing muscles become less responsive to the normal signals that stimulate muscle protein synthesis (9).

Researchers studying healthy ageing look at healthspan and physical function, not lifespan alone, and emphasise preserving muscle throughout life. From around the age of 30, adults gradually lose skeletal muscle, and that decline accelerates later in life.

Muscle matters beyond strength and appearance: it supports balance, mobility, metabolic health and independence as we age (8).

What is whey protein?

Whey is one of the two naturally occurring proteins in milk: it makes up roughly 20% of milk's total protein, and casein makes up the rest (11). In cheesemaking, whey stays in the liquid after the curds are separated.

For generations that liquid had relatively little value, and today it is one of the most extensively studied protein ingredients in nutrition science.

Researchers were drawn to whey because it is a complete protein, contains relatively high amounts of the essential amino acid leucine and is rapidly digested, so its amino acids become available quickly after you consume it (12, 13). Those qualities made it an ideal protein for studying muscle protein synthesis, recovery and body composition.

Before it reaches food, liquid whey goes through several stages of filtration, concentration, purification and drying to become the whey protein concentrates and isolates used throughout the food industry (11).

Why is whey protein in so many foods?

Because it lets manufacturers raise protein content without dramatically changing taste or texture. As demand for higher-protein foods accelerated, they needed an ingredient that could add protein while keeping product quality, and whey proved remarkably versatile: it blends well into drinks, dairy products, nutrition bars, meal replacements and many baked goods.

Its nutritional profile was already well established through decades of clinical research.

That demand built as the research filtered into doctors' and dietitians' advice, fitness training and the mainstream media, and as work on strength training, healthy ageing and body composition delivered a similar message: consume enough high-quality protein. Coffee, pancakes, popcorn, ice cream and even breakfast cereal now compete on grams of protein.

Greek yoghurt has become one of the fastest-growing segments of the dairy aisle, and whey is in ready-to-drink coffees, frozen meals and protein snacks. On social media, looking for ways to eat more protein through the day has its own name: protein maxxing.

Demand has grown faster than supply. Sports nutrition brands now compete for whey with yoghurt makers, breakfast cereal companies, ready-to-drink producers, meal replacement companies and medical nutrition manufacturers.

Whey begins as part of cheesemaking, and expanding processing capacity takes years of investment in specialised equipment, drying facilities, transport, quality control and skilled people. Recent industry reporting has documented tighter inventories, rising ingredient costs and more competition for premium whey proteins.

That doesn't mean the world is running out of whey protein, or that protein-rich foods will disappear from shelves. Dairy processors are expanding capacity, and the market is adapting to a protein boom driven by decades of research, not a passing fad.

How much protein is in HLTH Code Complete Meal, and what kind?

HLTH Code Complete Meal has 27g of protein per serve, from three sources: whey protein concentrate, egg whites and grass-fed collagen peptides, including 6.5g of collagen. Whey is fast-absorbing and rich in leucine, the amino acid that triggers muscle repair.

Chocolate Macadamia also lists sodium caseinate. Have it after a workout or as any meal of the day.

Frequently asked questions

What makes a protein high quality?

Higher-quality proteins generally provide the nine essential amino acids your body cannot make on its own in amounts that closely match human needs, and they are digested and absorbed efficiently. All proteins provide amino acids, but they differ in digestibility and in those proportions.

What is whey protein?

Whey is one of the two naturally occurring proteins in milk, roughly 20% of its total protein, with casein making up the rest. It stays in the liquid after the curds are separated in cheesemaking, then goes through filtration, concentration, purification and drying to become whey protein concentrate or isolate.

Why is whey protein so popular?

Researchers were drawn to it because it is a complete protein, relatively high in the essential amino acid leucine and rapidly digested. Manufacturers use it because it blends well into drinks, dairy products, nutrition bars, meal replacements and baked goods without dramatically changing taste or texture.

Does protein help you keep muscle while losing weight?

Yes. Higher-protein diets have consistently shown advantages for preserving lean body mass during weight loss: they help maintain muscle while body fat declines.

Protein also takes more energy to digest than the other macronutrients, which contributes modestly to daily energy expenditure.

Does protein keep you full?

It can. Protein-rich meals have promoted greater feelings of fullness than meals emphasising carbohydrates or fat, in part because protein stimulates hormones involved in satiety while suppressing hunger signals.

Do older adults need more protein?

Research has shown that older adults often benefit from consuming more high-quality protein than younger adults, because ageing muscles become less responsive to the normal signals that stimulate muscle protein synthesis. From around the age of 30, adults gradually lose skeletal muscle, and the decline accelerates later in life.

What protein is in HLTH Code Complete Meal?

27g per serve, from three sources: whey protein concentrate, egg whites and grass-fed collagen peptides, including 6.5g of collagen. Whey is fast-absorbing and rich in leucine, the amino acid that triggers muscle repair.

Chocolate Macadamia also lists sodium caseinate. Have it after a workout or as any meal of the day.

Is HLTH Code a meal or a protein shake?

A full meal. It's built to replace breakfast, lunch or dinner, not to sit on top of them.

Each serve has 400 calories, 27g protein, 27g healthy fats, 9g fibre, 25 vitamins and minerals, probiotics and digestive enzymes. Have it after a workout or whenever real food isn't on the table.

Can I have a meal replacement shake for breakfast?

Yes. HLTH Code Complete Meal is built to replace breakfast, lunch or dinner, with 400 calories and 27g protein per serve.

Add two scoops to 350ml of cold water or milk and shake. We recommend up to two a day.

Product facts: HLTH Code Complete Meal (nutrition panel and ingredients).

This article is for informational and educational purposes only. It is not, nor is it intended to be, a substitute for professional medical advice, diagnosis or treatment, and should never be relied upon for specific medical advice.