British retailers are rationing sales of powdered baby milk due to a surge in demand for foreign-made milk in China.
Milk powder manufacturer Danone said most supermarkets were introducing a restriction of two cans per customer.
Danone said the limit was to prevent some individuals from bulk-buying baby milk for unofficial exports to China.
Retailers said they were also capping sales of Nestle's SMA formula milks, the BBC reports.
In a statement Danone said:
"We understand that the increased demand is being fuelled by unofficial exports to China to satisfy the needs of parents who want Western brands for their babies."
"We would like to apologise to parents for any inconvenience caused by this limit. We know that most parents only buy one pack at a time, so we hope that the impact of this limit on UK parents will be minimal."