Ways to check food for added sugar.

Food manufacturers don't have to state how much sugar they've added to food, but instead they give a figure for the total sugars.
However,there are are various way to check the amount amount of sugar added to food products, these are:
The traffic light system can help identify sugary foods; red sugar labels represent food high in sugar, amber represents medium sugar content and green signals low sugar content. But this system is based on total sugars, so some foods such as natural yoghurt may be labelled amber even though they contain no added sugar – just naturally-occuring sugar. Don’t rely solely on traffic lights; you also need to look at the ingredients list.
Look at 'carbohydrates (of which sugars)' on the nutrition label. If the total sugar content is over 22.5g per 100g the food is high in sugar; if it is below 5g per 100g the food is low in sugar.
Check where sugar appears in the ingredients list. If it is near the beginning of the list then the food is probably high in added sugar.
Check if sugar is hiding under these names:
Sucrose
Glucose
Maltose
Lactose
Fructose
Molasses
Hydrolysed starch
Agave nectar
Corn syrup
Rice malt syrup
Honey
Golden syrup
You can check food labels for additional information.