fruit juices
 

Too much fruit juice*Orange juice may provide a decent dose of vitamin C, but it also packs huge amounts of calories in the form of fructose, a fruit sugar. ‘The fructose in juice can provide a great pre-workout energy boost,’ says nutritionist Thomas Midgley. ‘However, you should limit your intake at all other times because excess sugar will be stored as fat, as well as leading to dental problems.’