Hidden Sugar Found In Everyday Foods (And How They Can Damage Your Teeth)

Eating and drinking too much sugar has been linked to a whole host of health issues including obesity, heart disease, cancer and type 2 diabetes. But it can also cause havoc for your teeth and gums. Did your mum ever say that if you ate too many sweets your teeth would rot? Well, she was right.

Every time you eat or drink anything sugary, the sugar reacts with the plaque in your mouth which in turn produces harmful acids that can damage our teeth.

"Sugar plays a harmful role in tooth decay and it can actually act as a form of energy to our mouth bacteria," Dr Sameer Patel, clinical director at London’s dental and orthodontic practice Elleven, tells HuffPost UK Lifestyle.


"Once an individual consumes a sugary product, the bacteria multiples faster and takes on a gluey consistency that sticks to the tooth surface," he adds. "This makes it harder for our saliva to wash it away and protect teeth from damage – ultimately contributing to the build-up of plaque. I recommend that people keep a fluoride mouthwash and chewing gum to hand, whilst limiting sugar intake to isolated times in the day to protect teeth from decay."

But cutting down on sugar isn't as straightforward as you'd think, because there are plenty of hidden sugars in everyday foods.

While we all know the obvious sugar-laden culprits such as chocolate, fizzy drinks and cake, but did you know that soup can also be a sugar trap?

Here are a list of hidden sugar traps, provided by Dr Patel, together with tips to reduce oral damage:

Salad dressing

Getting your greens is essential for diet and nutrition but be wary of the salad dressings that you are using. Sweet French dressings and vinaigrette can have up to seven grams of sugar in one serving and with oil-based dressings claiming to be low in fat, that is often because they have been pumped full of sugar to compensate and enhance the flavour. Look out for ingredients such as dextrose, honey, glucose and maltose which are essentially variations on sugar and can be equally detrimental to our oral health.

For a lower-sugar option opt for a light homemade vinegar and olive oil dressing. Full fat mayonnaise also tends to contain less sugar than a reduced fat option and given that it is made from dairy, the calcium rich contents helps to keep teeth healthy and stop you from developing gum disease.

Soups and sauces

Although they taste savoury not sweet, many pasta sauces have between 6 and 12 grams of sugar per serving – the same amount as a slice of cake! Look at the traffic light system that many supermarkets put on the front of their products to indicate sugar, salt and fat content.

Vegetable soups and pasta sauces high in tomatoes can also be acidic and lead to enamel erosion and dental decay when consumed regularly. I recommend rinsing your mouth with water after consumption to limit the damage to your teeth.

Breakfast smoothies

Fruit’s natural sugar, fructose, is a common cause of cavities as the bacteria in the mouth feeds on it. Fruit and vegetable juices also tend to be extremely acidic and the high acid content can severely damage the enamel of your teeth in a similar way to fizzy drinks. Although fruit and vegetables are considered healthy acids, this is only the case when they are consumed as a whole, rather than as a concentrated juice.

Adding milk, which is alkaline, to your smoothies can help to counteract the acid damage to teeth and its calcium rich properties can boost your oral health and strengthen teeth. Drinking through a straw is also advisable.

Breakfast bars and yoghurts

Although they might make for a quick breakfast option in the morning, many processed foods contain a lot of sugar. The higher up it appears in the list of ingredients, the more sugar there is in the product.

Plain yoghurt contains naturally occurring sugars but often the fruity, highly-flavoured yoghurts add lots of sugar to enhance and sweeten the flavour. Energy and granola bars can also be very deceptive and despite branding stating how ‘healthy’ they are, experts have warned that these bars often contain as much sugar as a chocolate bar.

I advise my patients to eat unsweetened Greek yoghurt for a more tooth-friendly option and if you want to add a little extra flavour, opt for unsweetened muesli.


Surprisingly, many supermarket sandwiches have added sugar to sweeten the bitter taste and research has shown that in some brands, a slice of white or wholemeal bread can contain up to half a teaspoon of sugar. Experts advise that six teaspoons of sugar each day should be the maximum, consumed amount to maintain a healthy diet so for those who have a daily sandwich – check the ingredients list first!

Bread also takes on a gummy consistency when chewed that can allow small particles to get trapped between teeth and make them extremely tough to budge. To get rid of stuck particles, flossing as part of your oral hygiene routing is vital.


The excessive amount of sugar that is present in alcoholic drinks is often overlooked as it is so easy to have a few too many on a Friday night, but not only is this damaging our liver, it is detrimental to the deterioration of our oral health. In just one pint of cider there can be up to 20g of sugar and in rich spirits such as sherry there can be up to 20 grams in a double measure.

The large amount of sugar in alcohol erodes your tooth enamel and can lead to tooth decay. The sugar content in alcohol which, when broken down in your mouth, creates an acidic breeding ground for bacteria and plaque. To help minimise the damage caused by sugar when drinking alcohol, I recommend opting for a glass of wine, champagne or bottled beer as a serving of these drinks contain up to 2 grams of sugar which is definitely safer for your teeth. It is a good idea to alternate alcoholic drinks with a glass of water to rinse, this will help minimise the damage caused by sugar.