Bournemouth University researchers suggest a link between anxiety and drinks with high sugar levels.
Packaged milk drinks, including some packaged coffees, will be included in the "sugar tax", the Health Secretary has announced.
The tax on sugary drinks is being extended to include pre-packaged milk-based drinks.
Milkshakes and lattes to be included in UK sugar tax scheme for the first time.
The tax would be applied to manufacturers of milk-based drinks and dairy-based substitutes, under the plans.
Sugar taxes have been widely debated but in party manifestos, the word "sugar" barely appears. Why?
