A report has found that a typical Indian takeaway meal of a starter, main course and pilau rice can contain more calories than an adult's total daily requirements.
The research, carried out by Ulster University, also found such a meal can contain twice the recommended maximum level of fat and high levels of salt.
In addition, some varieties of naan bread contain almost a third of an adult's total daily calorie requirement.
The research was published in the latest of a series of reports by Safefood which look at the nutritional content of popular takeaway foods.
Of the dishes surveyed, an average portion of peshwari naan bread contain 748 calories, while an average portion of chicken tikka masala contained 1,249 calories.
Of the other most popular main courses, an average chicken korma contains 1,248 calories and the average chicken jalfrezi contained 721.
The report also highlights a major differences in the size of portions sold, depending on the restaurant.
The surveyed analysed 280 food samples from 36 Indian takeaways around Ireland.
Commenting on the report, Dr Cliodhna Foley-Nolan, Director Human Health & Nutrition with safefood, said "While traditional meals in India are low in fat, high in fibre and rich in fruit and vegetables, chefs here have adapted their recipes to suit local tastebuds, favouring foods high in fat and salt and serving bigger portions.
"These dishes have become very popular, but the Indian dishes tested in this survey were less than healthy."
Speaking on RTÉ's Morning Ireland programme, Dr Foley-Nolan said we have a certain amount of denial when it comes to the unhealthy aspects of takeaway food.
Dr Foley-Nolan said consumers would tend to eat the food from containers rather than on plates and therefore they are probably unaware of just how much they are eating.
She added it was important to cut portion size and limit extras such as peshwari naan, which she said was the equivalent to eating a slice of cake.
A 2013 survey found one in five Irish adults reported ordering an Indian takeaway recently, while one in three people said they order a full-sizemain portion for themselves.