Marcos, or macronutrients, is a way of breaking down what dieters eat on any given plan.
It refers to the larger groups of nutrients, carbohydrates, protein and fats.
Many claim the different break down of macros can lead to different diet results, even if you eat the same calories.
An expert explained more about macros for Express.co.uk.
Weight loss diet: Keto macros revealed - what are macros?
What are macros?
Rafael Rozenson, nutritional expert and founder of www.Drink-Vieve.co.uk, said: “For the most part, everyone knows what fat; protein and carbohydrates are and how to effectively manage them with regards to nutritional intake and maintaining a healthy diet.
“However, there seems to be an abundance of confusion surrounding what exactly a macronutrient is. To put it simply, this group of nutrients are located in different foods and drinks that help our bodies produce energy.
"This means that fat, protein and carbohydrates are all macronutrients in their own right, with each one being absolutely essential, no matter what your fitness goals might be, in order to lead a healthy life.
“There is no set template when it comes to macros; everyone is different and when trying to figure out your balance, you need to be taking your height, weight, activity levels and your overall fitness goals into account.”
The expert gave an example of what is considered typical macros for weight loss.
Weight loss diet: Keto macros revealed - what are