Sugar is a simple carbohydrate that belongs to a class of chemically-related sweet-flavored substances. It comes in many different forms. The three main types of sugar are sucrose, lactose, and fructose.
Even though our cells need sugar (glucose) to survive, consuming too much of it can cause numerous different health problems. Added sugar contains no beneficial nutrients and in excess only contributes to tooth decay, diabetes, and obesity.
The American Heart Association (AHA) have said that added sugars "contribute zero nutrients" and are just empty calories "that can lead to extra pounds, or even obesity, thereby reducing heart health."
Being aware of the existing and added sugar contents of the foods and drinks we consume is vital for our health - even more so today because so many products have sugar added to them.
In March 2015, the World Health Organization (WHO) published new guidelines recommending that adults and children alike reduce their consumption of free sugars to less than 10% of their total energy intake, with further reduction to below 5% associated with additional health benefits.
The term free sugars includes to glucose, fructose and sucrose added to foods and drinks, as well as sugars naturally present in syrups, honey and fruit juice. The term does not apply to sugars found naturally in fresh fruit, vegetables or milk, as to date there is no evidence associating the consumption of these sugars with adverse effects.
A single teaspoon of sugar is around 4 grams (g). The WHO state that reducing daily sugar consumption to 5% of daily energy intake would be around 6 teaspoons of sugar.
Sugar content in common foods and drinks
To help you keep track of how much sugar you're consuming we've listed some common everyday foods and drinks, together with their sugar content. Some of these may surprise you: