Colourful varieties of kitchen staple win praise for packing healthy punch

A nutritionist says purple sweet potatoes have higher antioxidants than the more popular gold variety and are a cost-effective food for families. 

Colourful varieties of kitchen staple win praise for packing healthy punch
A nutritionist says purple sweet potatoes have higher antioxidants than the more popular gold variety and are a cost-effective food for families. 

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