Christine Lampard and Dr Hilary Jones left fans "disgusted" as they watched the pair sip on an unusual milk.
The 42-year-old host who is stepping in from Lorraine Kelly during the summer holiday, couldn't wait to dive in.
Dr Hilary had to stop football star Frank Lampard's wife from sampling the potato milk before he had a chance to explain the sustainable benefits.
He told viewers at home that potato milk used less water and was a better option for the environment over other plant-based milks.
Despite the pros, fans of the programme were not convinced as they took Twitter to moan.
One online user penned: "Potato milk? I'd rather drink my own p*** #Lorraine."
"#Lorraine potato milk… just tell the truth Christine its f*****g rank," added a second.
A third said: "The worlds gone nuts, potato milk #lorraine."
While a forth wrote: "won't be drinking potato milk #lorraine," followed up with a puking emoji.
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