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Lifecycle and Food
Food has a very specific role to play in every part of the human lifecycle. The requirements of nutrients, keeps changing as a child grows to be an adolescent, from an adolescent to an adult, from an adult to the elderly. These ever changing needs have to satisfied for optimal growth and maturation. This section is dedicated entirely to understand the changing human body and its needs throughout the lifecycle. It deals with the nutrient requirements, why these nutrients are required, the Recommended Dietary Allowance (RDA), common nutritional problems faced during every sage and dietary guidelines to tackle with these problems.

The Human Lifecycle
Recommended Dietary Allowance is defined as the nutrient present in food that satisfies the daily requirement of nearly all individuals in a population. It depends on many facts like age, sex, physical work and physiological stress. Thus, it is different for all the above mentioned age groups. The RDA for Indians throughout the lifecycle is given below.




Group Particulars Body
Weight


Kg
Energy



Kcal/d
Protein



g/d
Fat



g/d
Calcium



mg/d
Iron



mg/d
Vitamin A Thiamin



mg/d
Riboflavin



mg/d
Nicotinic acid


mg/d
Pyridoxine



mg/d
Vit C



mg/d
Folic Acid


μg/d
Vit B12


μg/d
Retinol


μg/d
β carotene

μg/d
Man Sedentary work 60 2425 60 20 400 28 600 2400 1.2 1.4 16 2.0 40 100 1
Moderate work 2875 1.4 1.6 18
Heavy Work 3800 1.6 1.9 21
Woman Sedentary work 50 1875 50 20 400 30 600 2400 0.9 1.1 12 2.0 40 100 1
Moderate work 2225 1.1 1.3 14
Heavy Work 2925 1.2 1.5 16
Pregnant woman   + 300 + 15 30 1000 38 600 2400 + 0.2 + 0.2 + 2 2.5 40 400 1
Lactation:
0 – 6 months
  + 550 + 25 45 1000 30 950 3800 + 0.3 + 0.3 + 4 2.5 80 150 1.5
6 – 12 months   + 400 + 18 + 0.2 + 0.2 + 3
Infant 0 – 6 months 5.4 108/Kg 2.05/Kg   500   350 1400 55 μ g/Kg 65 μ g/Kg 710 μ g/Kg 0.1 25 25 0.2
6 – 12 months 8.6 98/Kg 1.65/Kg     50 μ g/Kg 60 μ g/Kg 650 μ g/Kg 0.4
Children 1 -3 yrs 12.2 1240 22 25 400 12 400 1600 0.6 0.7 8 0.9 40 30 0.2 - 1
4 – 6 yrs 19.0 1690 30 18 0.9 1.0 11 40
7 – 9 yrs 26.9 1950 41 26 600 2400 1.0 1.2 13 1.6 60
Boys 10 – 12 yrs 35.4 2190 54 22 600 34 600 2400 1.1 1.3 15 1.6 40 70 0.2 - 1
Girls 10 – 12 yrs 31.5 1970 57 19 1.0 1.2 13
Boys 13 – 15 yrs 47.8 2450 70 22 600 41 600 2400 1.2 1.5 16 2.0 40 100 0.2 - 1
Girls 13 – 15 yrs 46.7 2060 65 28 1.0 1.2 14
Boys 16 – 18 yrs 57.1 2640 78 22 500 50 600 2400 1.3 1.6 17 2.0 40 100 0.2 - 1
Girls 16 – 18 yrs 49.9 2060 63 30 1.0 1.2 14
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