Saturday 24 March 2018

Promotion: Can diet fizzy drinks count towards your fluid intake?

Even diet fizzy drinks contain acid which can damage teeth. Photo: Getty Images
Even diet fizzy drinks contain acid which can damage teeth. Photo: Getty Images

Dr Evelyn Hannon

As part of our fluid intake, how bad for us are diet fizzy drinks? That is - for people like me who cannot have tea or coffee without a snack - and dislike water and milk!


LowLow nutritionist Dr Evelyn Hannon replies:

Hi Catherine

Thank you for your question.

The recommended daily fluid intake is six to eight glasses (or 1.2 litres) per day. All fluid counts towards our daily fluid intake so tea, coffee, soft drinks and milk all count.

Water and milk are the best choices for fluid intake as they are the most tooth-friendly and milk also contains lots of important nutrients such as calcium which is important for bone health.

If you dislike milk and water, a couple of suggestions to jazz things up a bit include adding slices of lemon and lime to water or adding a little sugar free squash or cordial (1 in 10 dilution is a good guide). Fruit or herbal teas can also be a great idea.

Also while it can be difficult to sit down and drink a glass of water, it is often easier to drink it if you carry a bottle around with you as much as possible (eg. on the way to work, on the desk at work) and take regular sips.

A couple of tips to help you to drink more milk include having breakfast cereal with milk or making porridge with milk instead of water. A cappuccino or latte can also be a good way to help boost milk intake.

However, if you simply just cannot drink milk, be sure to include other calcium-rich foods in your diet such as cheese and yoghurt.

With regard to diet fizzy drinks, they are certainly a healthier choice than the non-diet versions which contain a large amount of sugar.

While they are fine to drink in moderation, I would not recommend that they form a large part of your fluid intake every day as while the sugar in non-diet soft drinks can cause tooth decay, both diet and non-diet versions of soft drinks contain acid which can damage teeth.

Thanks to LowLow Nutritionist Dr Evelyn Hannon RPHNutr. For more information on LowLow check out

If you have a question for Dr Evelyn, email

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