Nutrient density is a measure of how many essential nutrients (such as vitamins, minerals, fibre, and protein) a food provides per calorie. Foods high in essential nutrients whilst being relatively low in calories are considered nutrient-dense.
For example:
✅ Spinach – High in vitamins A, C, and K while being low in calories.
✅ Salmon – Packed with omega-3 fatty acids and protein.
❌ Sugary Snacks – High in calories but low in essential nutrients.
The goal of a nutrient-dense diet is to maximise nutrition per calorie rather than focusing only on quantity.