We all know you can’t get blood from a stone, but did you know you can get milk from a potato?

In an age where the word ‘milk’ can refer to dozens of products, we’re no strangers to dairy alternatives. Potato milk, however, is a new one.

Developed by Professor of food technology, engineering, and nutrition, Eva Tornberg at Lund University, Dug milk – which is sold across Sweden and the UK – is made from the humble spud.

The idea came about after the scientist was taking part in a research project about potato proteins compared to other vegetable proteins.

Tornberg tells Metro.co.uk: ‘Compared to other vegetables, potatoes are not usually seen as a good dietary source of proteins, as they only contain around 1-1.5% protein.

‘However, potato proteins do have an excellent amino acid composition full of essential amino acids, as well as a high biological value (BV), which indicates how well proteins can be absorbed in the body.’

These findings led her to the realisation that potatoes – which require less land and water to grow than other crops – might make the perfect sustainable milk alternative for those who are concerned about the environment.

For comparison, potatoes need two times less land to grow than oats and the process uses 56 times less water than almond cultivation. The BV of potato proteins (between 90 and 100) is also around the same as eggs and higher than soy proteins.

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