Many people often use the terms “food” and “nutrition” interchangeably ; however, and although both are closely related, they do not mean the same thing.
Nutrition is a vital process for human beings, through which our body takes advantage of those nutrients that we have ingested so that the organism works correctly, for example, so that the cells remain alive and have the necessary energy to do their work well. Although we sometimes talk about human nutrition, animals and plants also feed themselves. As we will see later, it is possible to talk about different forms of nutrition: autotrophic nutrition or heterotrophic nutrition are some examples.
On the other hand, food is made up of actions that we consciously and voluntarily carry out, which aim to select, prepare and eat food.
In the following lines we will go into more detail about the difference between food and nutrition and we will explain the different types that exist.
What are nutrients and foods
To understand the difference between food and nutrition, it is ideal to start by understanding the difference between food and nutrient. Food is any nutritive substance or product that is intended to be ingested by human beings, whether it has been completely transformed or not (for example, if it has been cooked).
- Vegetables and greens
- Milk and its derivatives
- Meat and sausages
- Fish and shellfish
- Sugars, sweets, and sugary drinks
- Oils and fats
- Alcoholic drinks
- Chewing gum (According to the European Parliament, 2002)
Not included are: feed, live animals (except those that are marketed for human consumption, for example, oysters), plants before harvest, medicines or cosmetics.
Instead, nutrients are substances found in food that are useful for organic metabolism . Nutrients are classified into macronutrients and micronutrients. The former include proteins, carbohydrates, and lipids; and the second vitamins and minerals. Some experts include water within the group of nutrients, but exclude alcohol.
The concept of nutrition
Taking into account the definition of nutrients, nutrition is the unconscious and involuntary processes by which the body digests, transforms and makes use of the aforementioned nutrients. Likewise, it also includes the process of eliminating substances that are part of ingested food and that the body does not need.
Nutrition is key to life, since without consuming food or water, we would die. That said, you cannot talk about bad or good nutrition, as this would refer to food. If possible, instead, talk about poor nutrition.
On the other hand, there are two essential types of nutrition: autotrophic and heterotrophic.
1. Autotrophic nutrition
It occurs when a living being feeds after synthesizing inorganic substances . That is, it can only be done by those living beings that manage to produce their own food, for example, plants through photosynthesis (these living beings are called photolithoautotrophs) or some bacteria that use chemical elements and are called chemolithotrophs. . For example: bacteria.
2. Heterotrophic nutrition
Heterotrophic living things need an elaborate source of food . Humans and other animals, fungi and a large part of microorganisms belong to this group.
Heterotrophic nutrition can be divided into:
- Parasitic nutrition: a living being lives inside another that it feeds on and is harmful at the same time.
- Saprophytic nutrition: a living being obtains nutrients from the environment and breaks them down thanks to the action of enzymes.
- Holozoic nutrition: it is that of human beings. Solid foods are eaten to later digest and get the nutrients you need.
There are three types of holozoic nutrition :
- Herbivorous nutrition: the living being eats vegetables.
- Carnivorous nutrition: the living being eats meat.
- Omnivorous nutrition: the living being eats vegetables and meat.
Herbivorous nutrition differs from vegetarian nutrition, because herbivorous nutrition is one in which the body is biologically prepared to decompose vegetables; and vegetarian food is one in which the person chooses to eat vegetables.
Food: why it is not the same as nutrition
After observing the previous example, it is clear that eating is a conscious and voluntary process, in which the person chooses what to eat and how to do it. Likewise, eating is an educable and modifiable act throughout life, which allows habits to change.
Some types of diet are:
- Infant feeding : one that focuses on obtaining the best nutrition for children of growing age.
- Feeding of the pregnant woman : the most appropriate for the pregnancy process.
- Sports nutrition: a selection of foods that maximize the energy level and muscle recovery of individuals who practice sports or perform physical exercise.
- Healthy eating : the eating habits or customs that help to have a life with greater physical health.
- Vegetarianism : vegetarianism is an ideology that influences eating habits, since these people basically consume vegetables and fruits. In addition to strict vegetarians, there are lacto-ovo vegetarians, who consume eggs and dairy in addition to vegetables; and lacto-vegetarians, who only eat dairy in their diet in addition to vegetables.
- Veganism : it is the ideology of not eating food products of animal origin, that is, not eating meat products and fish, and neither eggs, dairy products or honey, but it goes beyond food; nothing that comes from animals is consumed.