New figures show sales of hand wash products, including sanitizers, grew 15% in 12 weeks to the end of February.
Kantar says the Irish grocery market maintained "steady growth" of 1.3% in the same period.
All the major grocers were on an upward trajectory, ahead of widespread disruption caused by Storm Jorge and COVID-19.
February saw consumers take steps to ward off colds and flu, though the impact in Ireland was less pronounced than it was in Britain.
Consumer insight director at Kantar, Charlotte Scott, said: "We'd expect to see more of an impact towards the end of February and into March, as increased awareness of the virus will likely lead to an uplift in sales of healthcare products.
"This coupled with the impact of Storm Jorge in late February may well lead to growing sales of goods typically associated with stockpiling like pasta and tinned or frozen food."
Meanwhile, retailers capitalised on the most romantic day of the year - which provided a welcome boost for grocers.
Sales of chocolates and gifts were up by 13% over the four weeks to February 23rd, while other traditional Valentine's Day categories - like wine and chilled ready meals - grew by 6%.
Dunnes, Tesco and SuperValu all contributed to the boost in promotional activity, increasing sales of boxed chocolates on offer by 23%, 22% and 18% respectively.
Lidl remained the fastest growing retailer, increasing its market share by 0.5 percentage points to 11.5%.
The grocer benefited from shoppers maintaining healthy habits, with fruit sales rising by an additional €2.3m.
Aldi was hot on Lidl's heels, enjoying marginally slower growth than last period at 5.3%.
The retailer continued to gain share as shoppers chose to put more in baskets, with one in every two customers adding an additional item compared to the same 12 weeks last year.
Supervalu weathered a slowdown in growth, managing to increase its market share to 21.4%.
It benefited from a wider market uplift in organic food sales of 12%, as the number of baskets across all retailers containing organic goods rose by 9% year on year.
Tesco accelerated its growth rate to 0.7% this period and held its position as the second largest retailer in Ireland.
Shoppers visited the store more frequently, with trips rising 2.5%, and filled baskets in particular with convenience goods.
Meanwhile, Dunnes was the only other retailer to accelerate its growth rate along with Tesco.
The grocer gained 0.5 percentage share points, taking it to a 23.5% market share.
Performance was led by success in key staple categories, with sales of fresh produce up 3% and an uptick of 12% in bread sales.