An adequate daily intake of fluid depends on your age, gender, health, environment and lifestyle. While this health rule might not be completely true, it still makes an important point -- the human body simply cannot survive without water. Rather than relying on the outdated eight-glasses-per-day theory, consider your age, gender, health status, environment and lifestyle to determine proper daily fluid intake. As with other nutrients, the Food and Nutrition Board recommends a specific daily water intake depending on age and gender. As a general rule, adult males need 3. However, pregnant women should aim for 3 liters per day, and lactating women need 3.
The science of nutrition is dedicated to learning about foods that the human body requires at different stages of life in order to meet the nutritional needs for proper growth, as well as to maintain health and prevent disease. A baby is born with a very high requirement for energy and nutrient intake per unit of body weight to provide for rapid growth. The rate of growth is the highest during the first year and declines slowly after the age of two, with a corresponding decrease in nutrient and energy requirements. During puberty , however, nutritional requirements increase sharply until this period of fast growth is completed.
Appendix 2. Estimated Calorie Needs per Day, by Age, Sex, and Physical Activity Level
The daily nutritional requirements of your dog depends on its age and activity level. Elderly dogs, adult dogs and puppies require different levels of fat, protein, vitamins and minerals. To ensure your pet's health, learn which nutrients are most vital to your dog.
The person may forget to eat and may only eat when they are starving. In some cases, individuals with the condition will exclude whole food groups, such as fruits or vegetables. Sometimes excluded foods can be refused based on color. Some may only like very hot or very cold foods, very crunchy or hard-to-chew foods, or very soft foods, or avoid sauces.