Duration: 4'50''
Enzymes are biological catalysts which help us to get the energy we need from food to survive.
Licence: ERA Licence required
UK only Staff and students of licensed education establishments only Cannot be adapted
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Kate Quilton investigates the grapefruit diet and whether grapefruit really can burn fat.
Dr Chris van Tulleken investigates how much energy is in popular foods by setting them on fire.
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