Ask About Your Nutrition
“The doctor of the future will no longer treat the human frame with drugs, but rather will cure and prevent disease with nutrition.”
~ Thomas Edison
Nutrition is the science that interprets the interaction of nutrients and other substances in food in relation to maintenance, growth, reproduction, health and disease of an organism. It includes food intake, absorption, assimilation, biosynthesis, catabolism and excretion. Every day you make food choices that influence your body’s health for better or worse.
Nutrients are substances the body uses for the growth, maintenance and repair of its tissues. They are water, carbohydrates, lipids, proteins, vitamins and minerals found in foods.
Chemical composition of nutrients
- Minerals and water are inorganic nutrients which mean they do not contain carbon.
- Carbohydrates, lipids, proteins and vitamins they contain carbon, therefore, they are organics compounds.
Elements in the six classes of nutrients
(a) Some proteins also contain the mineral sulphur
(b) Some vitamins contain nitrogen; some contain minerals
The energy released from carbohydrates, fats and proteins can be measured in JOULES. In the USA, a calorie is the preferred measurement unit for food.
- A gram of carbohydrates yields about 17 kilojoules (4 calories) of energy
- A gram of protein also yields 17 kilojoules ( 4 calories) of energy
- A gram of fat yields 37 kilojoules (9 kilocalories)
FAT, therefore, has greater energy density than either carbohydrate or protein. Most foods contain all three energy-yielding nutrients as well as water, vitamins, minerals and other substances. Alcohol is not considered a nutrient because it interferes with the growth, maintenance and repair of the body.
The vitamins do not provide energy. They facilitate the release of energy from carbohydrates, fat and protein and participate in different activities throughout the body.
The minerals do not yield energy. There are 16 minerals known to be essential in human nutrition.
The water participates in metabolic reactions and is used as a medium of transport for vital materials to cells and carrying waste products away from them, therefore, it is indispensable to our body activities.