Various health organisations have recently issued recommendations for maximum free sugars intake, these include, the World Health Organisation (WHO) and the UK Scientific Advisory Committee on Nutrition (SACN) and the American Heart Association.

It is generally agreed that for the best benefits to our health, sugar intakes should be reduced to around 5% of daily energy – around 30g or 7 teaspoons/cubes for an average adult. This is the equivalent of a small glass of fruit juice and a flavoured yoghurt per day. The recommendation for children is of 24g/day for children aged 5-11 and of 19g/day for children aged 4-6. 

Source: https://www.gov.uk/government/news/young-children-still-exceeding-sugar-recommendation