Nutrition

This section will not tell you what to eat. Its aim is that you can read and judge labels, calories and nutrient values on your own — in other words, that you become food literate.

What is food literacy?

Few subjects attract as many confident claims as nutrition. Food literacy means knowing which questions to ask when you meet one: What is the source? What does "per serving" actually refer to? What does "natural" on a package really mean? The content here does not push an eating style; it builds a framework you can use to evaluate any nutrition claim you come across.

Calories and energy balance

A calorie is a unit of measurement — neither an enemy nor a goal in itself. Daily energy needs vary from person to person with age, body, activity and much else, which is why every calculation should be read as an estimated range. In this section you learn the logic of energy balance and how to interpret the results of the calculators in the tools section sensibly.

Reading labels is a skill

To someone who can read it, a product label says a great deal: the difference between per-100-gram and per-serving values, what the order of the ingredients list means, and the many names under which sugar can appear. The label-reading content works through these practical skills with real examples, and the reference entries in the Atlas let you look up individual foods, vitamins and minerals whenever you need them.

The limits of this section

You will not find personalised diet lists, weight targets or supplement recommendations here; those belong to a dietitian or doctor who knows you. If you have a health condition, are pregnant or breastfeeding, or are considering a major change to how you eat, talk to a professional first. This site's job is to send you into that conversation with better questions.

Guide

How to read a food label

The label on a supermarket product can look like a crowded table of numbers at first glance. Once you know where to look, though, it becomes the most reliable source of i

Guide

Sorting foods into good and bad

Sorting foods into two lists, “good” and “bad”, is mentally reassuring; it makes decisions easier. That binary view does not match the way nutrition science works, howeve

Guide

What is BMR?

Even if you do not move all day, your body spends energy on breathing, keeping the heart going and renewing cells. That baseline expenditure is called the basal metabolic

Guide

How to build a budget-friendly eating plan

The idea that balanced eating is expensive is widespread; what usually strains the kitchen budget, though, is a lack of planning. With pulses, eggs, seasonal vegetables a

Guide

What is energy balance?

Where body weight goes over the long term depends on the relationship between the energy taken in and the energy spent. That relationship is called energy balance; it loo

Guide

How to build a weekly meal plan

A weekly meal plan lets you make decisions once a week, with a clear head, instead of wrestling with “what shall we eat today?” every evening. A good plan is not a rigid

Guide

Why calorie counts are never exact

Calorie calculators and labels give figures with decimal points, and that appearance of precision is misleading. In reality both the calories taken in and those spent wor

Guide

What is a calorie?

Calorie is the word that comes up most often in conversations about food and is defined least often. It is neither a type of food nor an enemy; it is simply a unit of ene

Guide

What are carbohydrates?

Carbohydrate is a food group that has been celebrated in some periods and blamed in others. It is in fact the shared name of a very wide family, running from lentils to s

Tools

Tool

Daily Calorie Needs Calculator

This tool presents your daily energy needs as an estimated range rather than a single number, and shows how different goal scenarios shift that range.

Tool

BMR Calculator

Your basal metabolic rate (BMR) is the energy your body spends on the vital functions it keeps going even at complete rest. This tool estimates a BMR value from your age,

Tool

TDEE Calculator

TDEE, or total daily energy expenditure, estimates the total energy you spend in a day by adding your daily movement and exercise on top of your resting metabolism.

Tool

Macro Split Calculator

This tool divides the daily energy figure you set between protein, carbohydrate and fat according to the percentages you choose, and shows what each share comes to in gra

Tool

Protein Range Calculator

This tool works out, in grams, the informational range cited in the literature for daily protein intake, based on your body weight.

Tool

Water Intake Planner

The Water Intake Planner starts from your body weight to show a practical opening range for fluid intake through the day, and turns it into a draft drinking schedule spre

Tool

Food Comparator

The Food Comparator places the foods you choose side by side over the same quantity, so you can compare their energy and macronutrient values on fair ground.

Tool

Recipe Nutrition Calculator

When you enter the ingredients of a recipe and their amounts, this tool works out the estimated energy and macronutrient values of the recipe in total and per portion.

Tool

Label Comparator

The Label Comparator converts the nutrition values on two products’ packaging to a common basis, giving a comparison free of portion tricks.

Frequently asked questions

Will you give me a diet plan?

No. A personalised eating plan is the work of a dietitian who knows your health history. This section gives you the knowledge to understand and question any plan — not the plan itself.

How precise are the calorie and nutrient figures?

They are estimates based on averages. The values of the same food vary with growing conditions, preparation and portion size, which is why atlas entries present them as approximate ranges.

Should I take vitamin supplements?

That is a decision to make with a doctor who can see your blood work and health picture. The atlas explains what vitamins do and which foods contain them; leave the supplement decision to your clinician.

First published: 2026-08-12Last reviewed: 2026-08-12Editorial status: working editionReport an error