He said it was his duty to represent the interests of farmers in the face of Brexit.
"We're very much in this one together and I want you all to know that the Government has your back," he said.
"In our actions, in our negotiations, we have kept our word and will continue to do so."
He added: "I know at the moment there is a huge focus on the border at present but I want you to know that every time I enter talks or negotiations on Brexit ... when it comes to Brexit, farmers, fishermen and businessmen and businesswomen and exporters are always at the front of my mind and the need to protect the jobs, wealth and revenues you create, to defend the communities you serve."
Mr Varadkar said the government's objective was to maintain a trading relationship between Ireland and Britain that would mean "no tariffs, no quotas and no new red tape, and also of course avoid the reintroduction of a hard border on the island of Ireland".
He added one of the Government's priorities was to protect the Common Agriculture Policy budget for the period 2021-2027, especially payments to farmers.
The Taoiseach said the Government has alerted the European Commission of its intention to seek emergency aid in the event of the UK crashing out of the EU.
He said the purpose of the aid was to enable Ireland to cope with the impact on its trade, particularly what he described as the exposed beef, dairy and fishing sectors.
Addressing his recent remarks he was cutting down on eating meat, Mr Varadkar said he believed politicians needed to be careful about what they say.
He said one of the most controversial things the late US president George Bush Senior said during his presidency was that he hated broccoli and banned from the White House.
It resulted in farmers sending Mr Bush a 20-tonne shipment of the vegetable.
"I guess the lesson there is that politicians have to be careful about what they eat, careful about what they say and particularly careful about what they say they eat," he said.
He added people were aware of the impact of diets on health and the environment, and discussions about the matter were happening in homes across the country.
He said agriculture accounts for about a third of all of Ireland's greenhouse gas emissions and that the agriculture sector had an important role to play in helping reduce the country's carbon emissions.