Most adults and children in the UK (and the USA) eat too much sugar. Cut down by eating fewer sugary foods, such as sweets, cakes and biscuits, and drinking fewer sugary soft drinks. 
Sugar is sweet, it tastes great but it's bad for you.
Some advertisers try and tell you their food product is healthy but when you taste it it's very sweet and/or when you check the contents you find there's a great deal of sugar in it. Unless you read the small print very carefully you won't find out about the sugar at all. Sweetened yoghurt, for example is too often advertised this way. Many Countries have laws against misleading advertising. Sadly manufacturers and advertisers can afford paying legal experts to find ways of getting round the law. Many foods that pretend to be healthy have too much sugar. Remember manufacturers and advertisers aren't Affectionate towards you or caring. Manufacturers and advertisers aren't interested in keeping you healthy. They aren't interested in helping you to keep your kids healthy. They're interested in getting you to buy their product so they can make a profit.
Sugar: the other kind Edit
To many in the US, and especially in some regions, Sugar is a common euphemism for affection. Sugar = Sweetness = Affection. For that matter, maybe it originated somewhere else. Wherever the expression came form, this kind of sugar is the good kind! It improves health.