Jemma O'Hanlon

Dietitian, Consultant, Keynote Speaker

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Protein shakes for weight loss

Written by Catherine Saxelby on Wednesday, 09 November 2022.

Protein shakes for weight loss
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These days, protein shakes aren’t bought by just body builders – they’re so popular that you can readily buy a 400 g tub at your local supermarket or service station. And with tempting claims such as ‘Facilitates muscle toning’, ‘Contains transformation-making protein’ and ‘Tastes incredible, mixes easily’, why wouldn’t you grab one? But protein shakes aren’t the magic answer to all your weight-loss woes. Let’s take a look at what you get for your money.

Guest post by dietitian Zoe Wilson APD

Why would you buy a protein shake?

From body builders to football players, many athletes use protein powders to help them build muscle mass. People who are trying to gain weight or who are on a liquid diet (think mouth surgery or a broken jaw) may need to take protein in liquid form, too. But these people are in the minority.

If you just want to feel full and beat the 3pm munchies, however, there are better, healthier and cheaper alternatives. And if you think it’s a weight-loss solution, think again! Protein shakes aren’t the solution to losing weight that many would have you believe.

What are protein shakes?

Most protein shakes consist of protein from soy or dairy (whey or casein) in powdered form, either with or without carbohydrates and other performance-enhancing ingredients such as carnitine, ‘fat metabolisers’, vitamins and minerals.

When you mix these powders with water or milk, they turn into a milkshake- or smoothie-type drink.

When you look at the ingredients list, however, it becomes clear that these shakes are NOT simply powdered protein. There is a host of other ingredients, including additives such as gums, thickeners, sweeteners, flavours and indigestible fibre, some of which can commonly cause symptoms such as bloating, wind, nausea and diarrhoea. You’ll be surprised at just how many ‘extras’ these powders contain.

For instance, a typical chocolate-flavoured powder contains these ingredients:

  • Dairy whey protein concentrate
  • Soy or dairy protein isolate
  • Inulin [a sweetener made from chicory, which is classified as fibre]
  • Glycine
  • Cocoa powder
  • Flavours
  • L-Carnitine
  • Stevia [a sweetener]
  • Vitamins and mineral mix
  • Emulsifier (soy lecithin)
  • Vegetable gum (xanthan)
  • Maltodextrin
  • Choline

Foods as protein sources

How do protein powders compare with an egg or glass of milk?

We compared the protein, kilojoules and cost of a typical protein shake, made using 45 g protein powder and 1 cup milk or water, to two eggs or a glass of skim milk.

 

 2 eggs

 250 ml skim milk

 1 serve protein powder made with 250 ml skim milk

 1 serve protein powder made with 250 ml water

Energy (kJ) 

 580

 370

1,000

 600

 Protein

 13

 9

 30

 25

 Cost per serve

$0.90

$1.00 

$4.10 

$3.60 

At 25–30 g protein per serve, the protein shakes had 1.5–3 times times more protein than the two eggs or skim milk.

Sounds good, right? But just wait a second before you buy a tub. The protein shakes were also higher in kilojoules than eggs or skim milk. A typical protein shake made with skim milk has about 1,000 kJ, which is almost double the 600 kJ recommended for a snack, and almost three times the kilojoules of a glass of plain old-fashioned skim milk. It’s no between-meal snack.

The protein shakes were more expensive, too. Per serve, they were up to four times pricier than eggs or skim milk. There are better, healthier and more affordable ways for you to get your protein.

Glass Milk Two Eggs

Can protein shakes help you lose weight?

Increasing your protein intake modestly can help you lose weight. Studies have shown that a higher-protein diet that includes low-Glycaemic Index (GI) carbs is one of the most successful diets for weight loss because it helps to keep hunger at bay and is easy to follow in the long term.

The main problem with these powders is the kilojoules. If you’re adding protein powders as extra snacks throughout the day, and don’t adjust and eat less at your next meal, then you’ll be adding excess kilojoules that will be stored as fat. Exactly the opposite of what you’re trying to achieve!

Convenience plus

Protein powders are convenient, but food can be too. It’s easy to increase the amount of protein in your diet through food alone. For example, make sure you always include some protein at each meal – eggs or yoghurt at breakfast, chicken or tuna in your wrap at lunch and meat in a stir-fry at dinner. Also choose protein-containing snacks such as a handful of nuts, small tub of yoghurt or hard-boiled egg.

The bottom line

To shake or not to shake? For the average person, it’s fine to increase your protein intake modestly if you’re looking to lose weight, but there’s no need to overdo it. It’s really easy to get enough protein through diet alone. Instead of paying top dollar for protein shakes, why not look to foods such as dairy, eggs, fish or meat? These will keep you full and help with muscle-building and weight loss.

By choosing whole foods over protein powders, you know you’re eating something minimally processed that’s packed with other great nutrients. You’ll also cut out any artificial ingredients – and all for a fraction of the cost. Don’t be fooled by those claims sprawled across the packet and always remember, if it sounds too good to be true, then it probably is. No powder beats a healthy diet for health in the long run.

Guest post by accredited dietitian Zoe Wilson who blogs at www.zoewilsonnutrition.com

Reviews

  • Product snapshot: Tomato pasta sauces

    Product snapshot: Tomato pasta sauces

    18 September 2023 by, Catherine Saxelby

    What’s in your favourite tomato pasta sauce, and how much of it? Here are the most popular sauces reviewed for your reading pleasure.

    I’ve rated nine of the most popular tomato pasta sauces in terms of their nutrition, ingredient lists and jar size. You’ll find many of these in your local supermarket. The sauces are ranked:

    • from Italian (Italy grows the reddest full-flavoured tomatoes) to Australian
    • per 100 grams, which is equivalent to 3½ ounces (the standard for comparing food products)
    • by serving size (varies between brands but is generally 100–175 g in size)
    • by ingredient list, jar size and where made (with each product’s website as the source)

    The bottom line

    When you’re next out shopping, run your eyes down the per 100 g column and look for products containing less than 400 mg sodium AND less than 5 g fat (which equals 5% fat). Most of the brands are below these levels. I like Barilla, Sacla, Leggo’s, La Gina and Mutti – but that’s just me!

    Read more
  • Product Review: Low-sugar alcoholic ginger beer

    Product review: Low-sugar alcoholic ginger beer

    1 March 2023 by, Catherine Saxelby

    Want something to drink before dinner? Something that’s LOWER in alcohol than wine? To match his beer? Then look no further than Bundaberg’s low-sugar alcoholic ginger beer.

    You can drink Bundaberg low-sugar ginger beer straight from the can, or pour it into a long glass over ice with a slice of lime.

     

  • Product snapshot: Khorasan Macaroni

    Product snapshot: Berkelo’s Khorasan Macaroni

    14 September 2022 by, Catherine Saxelby

    I’m loving this macaroni from Berkelo. I was sent a sample for Whole Grain Week 2022 by the Grains Legume Nutrition Council. I cooked it up and found that it was just divine! Read on for more …

  • Product Review: super-high-oleic-safflower-oil

    Product review: Super high-oleic safflower oil

    11 May 2022 by, Catherine Saxelby

    “What does super high-oleic mean?” I hear you ask.  Also, “I haven’t heard of safflower for ages. What’s the deal?” Read on and all will be explained.

  • Product Review: Healthy Life Food Tracker

    Product review: Healthy Life Food Tracker

    6 April 2022 by, Catherine Saxelby

    When I was first asked to write this review, I thought, Not another tracker.

    After all, there have been several in recent years, such as My Fitness Pal and Everyday Diet Diary. But this one is different. It works by using your Everyday Rewards card AND your shop at Woolworths.

  • Product review: Lite n' Easy

    Product review: Lite n' Easy

    20 October 2021 by, Catherine Saxelby

    With home delivery on the rise, this post is reviewing none other than that stalwart Lite n’ Easy. We all know their meals are good for weight loss (which we all need after COVID-19!), but did you know they’re also good for general health and wellbeing ? Eating well to nourish yourself – putting your mental health and wellbeing at the forefront – is gaining momentum. Lite n’ Easy meals also ensures you satisfy your need for vitamins, minerals, fibre and phyto-compounds, such as sterols and carotenoids.

    clipboardThis post has been sponsored by Lite n' Easy.  

     

  • Product review:  Birds Eye Plant Based range

    Product review: Birds Eye Plant Based range

    15 September 2021 by, Catherine Saxelby

    When you think of Birds Eye, their frozen peas and fish fingers probably come to mind. But I bet you’d never think of plant-based products!

    clipboardThis post has been sponsored by Birds Eye. 

Healthy Weight Loss

  • Intermittent fasting vs daily calorie restriction

    Intermittent fasting vs daily calorie restriction

    3 May 2023 by, Catherine Saxelby

    As you probably know already, intermittent fasting (IF) has gained favour as an alternative regimen to daily caloric restriction (DCR). Fasting is shown to extend the lifespan of rats, and has been associated with metabolic benefits in humans, yet the results so far have been inconsistent. So, which regimen is best for healthy weight loss?

    Read more
  • The lifestyle diet craze

    The lifestyle diet craze

    15 March 2023 by, Catherine Saxelby

    What sort of a diet should you follow to lose that excess weight? These days, it’s pretty confusing with high-protein Keto advocates clashing with plant-protein followers … as well as intermittent fasters, juice-only dieters, no-carb dieters and no-animal (aka plant-based) dieters. Plus all the ads for anti-hunger supplements, meal-replacement shakes and home-delivered meals, more of which somehow appear every day. So, what sort of diet should YOU follow to lose that excess?

  • Protein shakes for weight loss

    Protein shakes for weight loss

    9 November 2022 by, Catherine Saxelby

    These days, protein shakes aren’t bought by just body builders – they’re so popular that you can readily buy a 400 g tub at your local supermarket or service station. And with tempting claims such as ‘Facilitates muscle toning’, ‘Contains transformation-making protein’ and ‘Tastes incredible, mixes easily’, why wouldn’t you grab one? But protein shakes aren’t the magic answer to all your weight-loss woes. Let’s take a look at what you get for your money.

    Guest post by dietitian Zoe Wilson APD

  • What is your relationship with food and eating?

    How to beat those cravings

    20 January 2021 by, Catherine Saxelby

    Many of us have cravings from time to time and for different reasons. One thing is certain, they can sabotage all your best efforts at a healthy diet and/or weight loss. The good news? You CAN beat them. I’ll tell you how.

  • What is your relationship with food and eating?

    How to lose weight WITHOUT going on a diet

    14 October 2020 by, Catherine Saxelby

    The word 'diet' is a turn-off for most people. It sounds hard, unpleasant and unpalatable. Losing weight doesn’t have to be hard AND it doesn’t have mean sticking to a 'diet'. You can forget Paleo, Keto, Vegan and Raw, Gluten-free and Intermittent Fasting. To lose weight, you don’t have to follow any specific diet. What you need is simple, healthy, nutritious food and a few tips and tricks.

  • What IS a healthy balanced diet for weight loss?

    What IS a healthy balanced diet for weight loss?

    16 September 2020 by, Catherine Saxelby

    Healthy weight loss happens when you lose weight slowly and steadily (around 1 kg or 2 pounds weight loss a week). Your goal is to lose weight while still getting your essential nutrients but from smaller portions. You certainly don’t want to be tired with no energy! That’s why you need regular healthy meals and snacks on hand to ensure your vitamins, minerals, omega-3s and fibre needs can be easily met. There is a new range of healthy weight loss meals available and it’s one that I’d like to recommend. With these ready meals, you’ll say goodbye to meal planning, shopping, meal preparation and cooking.

    This post is sponsored by Chefgood 

  • Kitchen make-over for the New Year

    Kitchen make-over for the New Year

    8 January 2020 by, Catherine Saxelby

     “This year, I'm going to lose weight!”, or “This year I’m opting for a healthier lifestyle!” Is your 2020 New Year's resolution something like one of these? If so, how is it going to happen?