Green smoothies seem to be popping up everywhere. We know that soft drinks, cordials and sports drinks contribute to weight gain and dental carriers, but does the beloved smoothie have a role to play too?

A typical green smoothie recipe may look something like this:

  • 1 cup raspberries
  • 1 medium banana, peeled
  • 3 cups fresh baby spinach
  • 2 teaspoons chia seeds, soaked for 20 minutes
  • ¾ cup of filtered water

Add all the ingredients to your blender and blend on high for 30 second or until creamy.

Calories: 213 | Protein: 6g | Carbs: 47g | Fat: 3g | Fiber: 14.9g

Now the nutrition profile of these ingredients is pretty good, but as you lay them out in front of you to prepare the smoothie, you can see that this in itself is the size of a small meal (with calories to match). Liquefying your meals and slamming them down on the run may seem perfectly convenient; however there are hidden dangers.

Too much, too quick.

If you decided to sit down at the table with a knife and fork and consume the original contents of your smoothie as a meal it would take some time, 15 minutes or so maybe, however if you proceed to blend all these ingredients together, put in a cup and “throw it down” as you head out the door, you will get the same “hit” of energy (kilojules/ calories) in probably less than half the time it would take you to consume it as a meal.

Evidence suggests that “throwing food down” in this fashion as well as eating until “full,” triples the risk of being overweight (1)

Increases Fussy Eating.

Beyond the convenience of a meal in a cup, many people use smoothies as an opportunity to “sneak” extra vegetables into their diet and the diet of their children (and husbands). This again seems like a great strategy (and I am not saying it’s not), however I am cautioning that this is not a productive way to encourage a child (or adult) to try new foods and eat their vegetables.

Despite the fact that a child (or husband) may unknowingly consume spinach when in a smoothie, it doesn’t mean the next time a handful of the stuff lands on their dinner plate they are going to be any more willing to eat it – and unless your child intends to follow a liquid diet their entire life it is important that they are given the opportunity to eat vegetables as food, as they look, as they feel and as they smell.

Don’t get me wrong I hide plenty of vegetable in my cooking (it is a great strategy for everyone to boost their vegetable intake and lower the energy of a meal), but some of those spinach leaves will always land on the plate as well.

A Dental Disaster.

Of course, lastly we have to consider the implications for oral health. The British Dental Association have expressed their concerns over the popularity of meeting the “5 a day” recommended intake of vegetables through smoothies as it contribute to erosion of tooth enamel. (2)

Further to this, relying on liquid meals denies a child the opportunity to practice critical chewing skills which strengthen the muscles needed for speech. Failure to develop these muscles through crewing can result in speech problems. This is also an issue with extensive bottle feeding, failure to introduce age appropriate textured food and over use food pouches which have a sucking nozzle.

Food, Food, Glorious Food

Eating is one of the simplest pleasures in life and despite the hectic, time starved society we live in, it is important to slow down and savour the holistic experience of a good meal which engages the senses and heightens psychosocial wellbeing through connecting with people, places and the experience of eating.

  • Wow really surprised to see how many calories can be in a smoothie!


  • Moderation is the key to a good healthy diet. Balanced but not smoothies for every meal, maybe once a week as a treat.


  • I think smoothies are great for those who are in a hurry.
    My friends son has to get up at 5.30 in the morning to get to school…he is 14 and says he doesnt eat breakfast because hes in too much of a rush in the mornings. Ive purchased him some chocolate protein powder…he is having that for breakfast now.


  • It’s so hard to know what to eat and drink these days. I love a green smoothie but did find I was putting on weight when having one for breakfast each day – too much fruit I believe.


  • Some smoothies can have so many hidden calories, I prefer to make my own and know what’s in them.


  • I always thought that smoothies were the healhier alternative or thats what they want you to believe


  • Fructose (fruit sugar) without the presence of fibre as naturally found in fruit does not get metabolised properly and gets stored immediately as fat, so in one respect yes they can be a poor diet choice! not as bad as soft drink but better than juices!!


  • I don’t give my kids smoothies that much but I tend to have them alot more. Don’t think I’ll be making them the way I do anymore. Thanks for the insight


  • Never consider this perspective, especially the dental effects


  • Ohh this made me look at smoothies slightly differently!


  • I prefer a smoothie for dessert but everything must be balanced and in moderation


  • So a very healthy smoothie can still have nearly 50g carbs.. That sounds like lots of sugar to be drinking.


  • smoothies are probably my favourite snack, so much energy can be obtained from them


  • Lots of good points I would never have thought of.


  • Smoothies that have predominantly fruit and vegies in them, with little dairy, ice-cream or sugar, should be filling and full of nutrition. A smoothie is only as bad as the person making it, because it’s you who decides what goes in it.


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