There's been a 12% increase in grocery sales nationwide as people prepare for more COVID-19 restrictions.
Research from Kantar shows €100 million more was spent in the past four weeks compared with the same time last year.
Alcohol sales in supermarkets have increased by 53%, amid restrictions on pubs and restaurants nationwide.
There is also a belief that people may be recreating restaurant meals at home, with the sales of international food increasing by 25%.
Researchers say the trends in Dublin over the past couple of weeks in level three restrictions may be a sign of what is about to come for the rest of the country with the capital having the largest growth in grocery sales over the past month.
In the capital sales went up by almost 20% - which is worth nearly €50 million.
Compared with last year, the sales of disinfectants and antiseptics in Dublin has risen by 67%.
Emer Healy, retail analyst at Kantar, said: "While growth over the past three months has slowed compared with the dizzying heights of lockdown, we still spent over €100 million more on groceries in the past four weeks versus this time last year.
"We expect to see a further boost in spend as restrictions tighten."
Uncertainty around Christmas has also seen an impact in the supermarkets - in the run-up to Christmas, €1.8 million less than last year has been spent on tins of chocolate and biscuits.