Food
Food is any substance, usually composed primarily of carbohydrates, fats, water and/or proteins, that can be eaten or drunk by an animal for nutrition or pleasure. Items considered food may be sourced from plants, animals or other categories such as fungus or fermented products like alcohol. Although many human cultures sought food items through hunting and gathering, today most cultures use farming, ranching, and fishing, with hunting, foraging and other methods of a local nature included but playing a minor role.
Most traditions have a recognizable cuisine, a specific set of cooking traditions, preferences, and practices, the study of which is known as gastronomy. Many cultures have diversified their foods by means of preparation, cooking methods and manufacturing. This also includes a complex food trade which helps the cultures to economically survive by-way-of food, not just by consumption.
Many cultures study the dietary analysis of food habits. While humans are omnivores, religion and social constructs such as morality often affect which foods they will consume. Food safety is also a concern with foodborne illness claiming many lives each year. In many languages, food is often used metaphorically or figuratively, as in "food for thought".

Food sources

Almost all foods are of plant or animal origin, although there are some exceptions. Foods not coming from animal or plant sources include various edible fungi, including mushrooms. Fungi and ambient bacteria are used in the preparation of fermented and pickled foods such as leavened bread, wine, beer, cheese, pickles, and yogurt. Many cultures eat seaweed, which is a protist, or blue-green algae (cyanobacteria) such as Spirulina.[1] Additionally, salt is often eaten as a flavoring or preservative, and baking soda is used in food preparation. Both of these are inorganic substances, as is water, an important part of human diet.

There are five main food groups, they are:• Fruits • Vegetables• Cereals and Pulses• Dairy• Poultry, Fish and Meat products
A healthy balance of these five food groups ensures essential vitamins, minerals and dietary fibre. The food group serving size will depend upon various factors like age, activity level, body size and gender.
You are overweight for the most simple of reasons -- because you're eating the wrong foods, the wrong types of calories per meal, and you're also eating meals in the wrong patterns each day.Think closely about what we're about to tell you, since it's going to change the way you think about dieting...FOOD is more powerful than any prescription weight loss pills, because the FOOD that you eat can either make you THIN or FAT. You don't get fat because of a lack of exercising, that's a myth. You get fat because you don't eat the right foods at the right intervals each day.Also, the pattern that you choose to eat your meals each day is more powerful than any prescription weight loss pills. This is true because your body is like an "engine" and it only needs certain foods at certain intervals each day, and if you don't eat the right foods at the right times then it won't burn those calories -- and you'll wind up storing those calories as fat tissue. (Hint: You need to eat more than 3 times per day to lose weight, but we'll show you the details later).You have gotten overweight by eating the wrong foods, that much is a fact. And guess what? You can get SLIM by eating the RIGHT FOODS at the RIGHT INTERVALS each day. It's not really any more complicated than that, and the way to start losing weight has nothing to do with starving yourself or jogging.