If you are speaking of humans then the answer is no. Humans are omnivores and while they can survive long periods on an all vegetable diet it is not good to remain on an all vegetable diet for life. Some animal protein needs to be included in the diet even if it is just dairy and eggs.
Yes, it is necessary because kids at their smaller age need nutrition. So foods in this category are good in nutrition. This is the growing age of children and if they are not provided with good nutrition, it is not good then.
Vitamins in fruits and vegetables do make the best nutrition. But proteins in meat, healthy fats and carbohydrates from grain related foods are necessary as well.
Nutrition labels weren't always required, but as foods increased their claims for health benefits, it became necessary for the FDA to regulate these claims. A nutrition label is now required if there is a claim regarding the benefits of specific ingredients.
Prevention,nutrition,fats,
functional foods
There are several foods that fall into this category. Foods such as fruits, vegetables, red meat, beans, milk, and others are very important in a healthy nutrition.
Topsoil is rich in nutrients because it is necessary for plant nutrition. Topsoil has about 17 different nutrients such as potassium, nitrogen and phosphorus.
Protiens, carboohydrates and vitamins.
Sustainability and nutrition!
http://www.diet.com/g/adult-nutrition is a website that explains the nutritional needs of adults. It elaborates on the types of foods, vitamins, and minerals needed for adults to live as healthy a life as possible.
Dextrose is a sugar (or carbohydrate) more commonly known as glucose. It is a common sugar found in most foods.
Solid foods can be introduced to infants around 6 months of age for optimal nutrition and development.