What’s In A Name?


PotatoesIt is surprisingly easy for urban myths to take hold and once accepted there is not much questioning of it. One myth that refuses to die is that sweet potatoes have less sugar than potatoes.

When you think about it for a moment, the name should give us a clue. Sweetness comes from sugar so logic should dictate that a sweet potato has more sugar than a regular one.

Indeed this is the case and by a bigger margin than you might think. The average sweet potato has 5,4g of sugar which is over four times as much as a regular potato which has only 1.3 g. When you drill down further we find that sweet potato has seven times as much sucrose as a regular potato.

Let me repeat that, a sweet potato has four times as much sugar and seven times as much sucrose as a regular potato.

So where did the myth come from? There is a lot of confusion about the terminology used to describe carbohydrates. Total carbohydrate content of a food includes what we call “good” carbs, which provide fibre and do not get absorbed quickly as well as “bad” carbs, or “sugars” which are absorbed quickly. It is this latter type, which goes to the hips.

Potatoes do have a higher amount of fibre (also called resistant starch) than sweet potatoes. But this does not get absorbed. This “good” carb does not go to the hips. It stays in the gut as fibre and helps with the workings of the gut.

Many of us get spooked by the term “starch” because it has been assumed that it is full of calories. The resistant starch in potatoes does not add to your total calorie intake because it does not get absorbed. The term “fibre” is better understood but means the same.

Nutrition has been made harder than it needs to be. We can all eat a healthy diet by focusing on the basics. This means good quality protein (animal or vegetable), good fats, vegetables and fruit.

Potatoes are a vegetable and are a good source of fibre, B group vitamins, potassium, vitamin C and folate. They are versatile, going well with many other foods and easy to prepare.

On top of all that, it is easy to get your children to eat them, which is not something you can say for all vegetables.

So with plenty of healthy fibre and way less sugar than sweet potatoes, make potatoes a regular part of your healthy eating plan.

Dr Joe is the health ambassador for locally grown fresh potatoes.


About Author

Dr Joe Kosterich M.B.B.S (WA) 1985 is a Medical Doctor, author, speaker, media presenter and health industry consultant, who wants you to be healthy and get the most out of life. Joe writes for numerous medical and mainstream publications and is also a regular on radio and television. He is often called to give opinions in medico legal cases and is an advisor to Reed Medical Conferences. Joe is Medical Advisor to Medicinal Cannabis Company Little Green Pharma and sits on the board of Australian Tobacco Harm Reduction Association. He has self-published two books: Dr Joe’s DIY Health and 60 Minutes To Better Health. Through all this he continues to see patients as a GP each week.


  1. grimsey56@gmail.com'

    So really. So who does one believe? A lot of times any one with a comment on this type of thing is being paid to say it. In this case I hope not because I like potatoes more than sweet potatoes. Obviously sugar is the big
    killer. Bit of a shame that, because I like “coffee with my sugar”.

    • Any vegetable is good to eat. The point of the article was to dispel the myth that sweet potatoes have less sugar than regular ones.The nutrition facts are stand alone. My position as Health Ambassador for Fresh Potatoes is declared.

  2. Jade@google.com'

    The fact that you’re an ambassador of and organisation (and disclosed at the bottom of an opinion piece) doesn’t mean sweet potatoes are bad for ones health, as your article implies. Saying so makes you look like a quack or a talking head for hire.

    • The article does not say sweet potatoes are bad for ones health. It states that regular potatoes have a lower sugar content as many people believe the reverse to apply.

  3. sharrellemanser2@hotmail.com'

    Interesting read.. Can you please clarify something thought… you state “The average sweet potato has 5,4g of sugar which is over four times as much as a regular potato which has only 1.3 g”

    While this might be true, an average sweet potato (at least where I am from) is a whole lot bigger then your average potato. Can you please clarify what weight you are referring to, or at least in a “100grams of each” style ratio?

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