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"Nutrition" is the intake of food and nutrients for health, like how it affects your metabolism, cardiovascular system, brain, and prevents (or causes) other diseases. This page brings together evidence-based resources on diets, nutrients, and healthy eating. We cover macronutrients, micronutrients, different diets, and the role of food in supporting health. We focus on getting people to understand how nutrition works, rather than promoting fad diets that don't work. So, whether you want to improve the quality of your diet, understand how it affects your health, or compare different approaches, we're here to help.
Nutrition is the process by which the body takes in and uses food for growth, keeping your cells alive, and repairing them. It covers both the nutrients found in foods (like proteins, carbohydrates, fats, vitamins, minerals, phytonutrients) and how your body digests, absorbs, and uses them to maintain your health and bodily function.
The six main nutrient categories are: carbohydrates, proteins, fats, vitamins, minerals, and water. The macronutrients (carbohydrates, proteins, and fats) provide energy and are needed in larger quantities, while micronutrients (vitamins and minerals) are required in smaller amounts but are still critical for your health.
"Superfood" is a marketing term, not a scientific one. It's typically used to describe "nutrient-dense" foods like berries, leafy greens, salmon, and nuts. While these foods are very healthy and nutritious, no single food provides all essential nutrients by itself. A varied, balanced diet is more important than focusing on any individual "superfood" alone.
Common signs include stubborn fatigue, frequent illnesses, slow healing or recovery, brittle hair and nails, unexplained weight changes, and difficulty concentrating. Deficiencies in certain nutrients have specific symptoms like "anaemia" (due to low iron), muscle weakness (due to low protein), or bleeding gums (due to low vitamin C).
Essential daily nutrients include high-quality proteins (containing essential amino acids), healthy fats (containing essential fatty acids), some carbohydrates (for energy), fibre, 13 different vitamins and minerals, and adequate water. Individual needs vary based on age, sex, your activity level, and health status.
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