The food is required by all living organisms, for the following purposes; For energy -- Food is used by the body, as a ſuel to work our muscles and other body organs. • For growth and repair - nutrients present in the food, are used by the body to make new cells , growth and to replace damaged cells. • To stay healthy - food, is used in the cellular reactions in our body, to produce energy
. to maintain healthy body, we must eat a healthy and balanced diet, It also means matching the amount of energy (calories) intake with the amount of energy output , for daily activities and exercise The quantity of food needed, to meet the requirements of various nutrients, varies with age, gender, physiological status and physical activities.
B alanced diet A balanced diet is the food which provides all the nutrients in required amounts and proper proportions. A balanced diet is defined as the food which provides, quantitatively and qualitatively, required amounts and proper proportions of all the nutrients for maintaining a good health and physiological efficiency.
ELEMENTS OF BALANCED DIET A balanced diet have macro- and micro-nutrients Which include: Carbohydrates , Proteins , Fat. , Vitamins , Minerals ,Water these nutrients are essential for daily life. All these nutrients can be obtained from different food grou ps.
FOOD GROUPS A food group is a collection of foods that share similar nutritional properties or biological specifications . they provide similar amounts and types of nutrients eg nutrients of the milk, yogurt, cheese and alternatives food group, include calcium and protein, the fruit group is a good source of vitamins, especially, vitamin C.
balanced diet can be obtained from four basic food groups .1. Cereals, millets and pulses 2. Vegetables and fruits 3. Milk and milk products, eggs, meat and fish, 4. Oils
according to their origin • Plant origin Animal origin • Food groups according to the predominant functions according to their predominant functions. Body-building foods, e.g. milk, meat, fish, eggs, . Energy-giving foods, e.g. cereals, roots and tubers, fats and oils, etc., . Protective foods, e.g. vegetables, fruits, milk, etc
OTHER FOOD GROUPS Instant foods Instant foods are those which undergo special processing, designed to dissolve or to disperse particles, more rapidly in a liquid e.g. instant noodles, soup powders, cornflakes, etc high calorie , high salt content , presence of additives like monosodium glutamate increases sodium intake from the food
Fast foods Fast foods are the foods that are already made or cooked to order, within minutes for consumption, noodles, burgers, fried fish, milk shakes, chips, salads, pizzas, sandwiches, . Storage, handling and microbial contaminations , calorie dense foods.
Street foods Street foods comprise of a wide range of readyto-eat foods and beverages, prepared and/or sold by the vendors and hawkers, on streets and other public places, e.g. idly, wada, dosa, chat items, . They may be contaminated with pathogenic organisms, unless hygienically prepared.
Junk foods Junk (unhealthy) foods are those foods containing little or no proteins, vitamins and minerals, but are rich in salt, sugar, fat and energy (empty calories) . Some examples are chocolates, artificially-flavored aerated drinks, potato chips, ice creams, french fries, etc. They are not only calorigenic, but also leads to obesity, rise of low density lipids (LDL or bad cholesterol), and fall of high density lipids
Sometimes foods Sometimes food, have very little nutritional value and are often processed and packaged. They are high in fat, sugar and salt , should not be taken by children on a regular basis. Examples , Chocolates, and confectionary Sweet biscuits, chips and high-fat savoury biscuits
Fried foods Pastry-based foods, sausage rolls Cakes, and ice creams Soft drinks, fruit juices, fruit drinks, Sports drinks, energy drinks, flavoured milk and flavoured mineral water
DIETARY SUPPLEMENTS Dietary supplement is the product that is intended to supplement the diet. These are neither drugs nor food or food additives Their manufacture and sale is also not regulated, The word supplement, should be clearly stated on the label.
ANTIOXIDANTS Antioxidants are present in green-leafy vegetables and plant foods, like papaya, turmeric, palm oil, amla and guava. The die t ary antioxidants include nutrients, such as Bcarotene (provitamin A), ascorbic acid (vitamin C), tocopherols, tocotrienols, riboflavin, sulfur-containing amino acids (cysteine and methionine) and selenium
Vegetarianism and vegan eating practices this means avoiding animal products, such as meat, poultry and fish. some vegetarians eat animal-related products, such as eggs, milk, cheese and yoghurt. vegetarians eat a variety of legumes, nuts, seeds and grainbased foods, to gain the same nutrients that meat, poultry and fish provide. . It is very difficult to meet children's nutritional needs with a vegan diet, because the amount of food needed for sufficient nutrients may be too large for the child to manage.
NUTRIENT PROFILES OF FOOD GROUPS . Whole grain , cereals and millets Cereals, such as rice and wheat, and millets like jowar, bajra, ragi, etc., are the cheapest sources of calories 70-80 % of the calories in the diet majority of population, in our country depends on these foods Most cereal grains contain 6-12% proteins. cereal proteins are deficient in essential amino acid
Whole grain cereals are important sources of B-vitamins, thiamin and niacin , present in the outer bran layer of the grain. Excessive milling and polishing of rice removes the outer covering and, , decreases thiamin content. • Total fat content, in cereals is 2-5 % .400 g of cereals are consumed per person, per day, in India.
pulses and legumes legumes include grams, peas and beans Dried are rich in proteins Legumes are good sources of Bvitamins and minerals, such as thiamin, riboflavin and phosphorus.
Legumes, contain some natural toxins, which can be removed by soaking and normal cooking procedures re sult in loss of some Bvitamins. Legumes are good for young children. cooked, mashed and mixed with other food items. . • Germination or sprouting increases vitamin C, riboflavin and niacin contents of legumes.
Nuts and oilseeds Nuts and oilseeds, such as peanut , groundnut soybean and oilseeds, are rich sources of proteins . They contain 18-40% protein. They are rich sources of fat, Bvitamins and vitamin E. • Groundnut contains 20-30% proteins and 40-50% fat. groundnut is a good source of thiamin, niacin, pantothenic acid and phosphorus.
When harvested under moist conditions, groundnut may get contaminated with Aspergillus flavus, produce aflatoxin. Roasting improves its nutritive value. Soybeans contain nearly 35-45% proteins and 15-20% fat . and vitamins , thiamin and niacin.
Vegetables Vegetables classified into 3 groups green leafy vegetables, roots and tubers, other vegetables.
Green leafy vegetables – Many types of green leaves, such as spinach (palak), amaranth, fenugreek leaves (methi), drumstick leaves, mint, coriander, mustard leaves, colocasia leaves, radish and turnip leaves, are rich sources of iron, B-carotene, vitamin C, riboflavin, folic acid and calcium. They also provide dietary fiber , antioxidants, and proteins
Roots and tubers – Roots and tubers, such as potatoes, sweet potatoes, carrots, etc., are good sources of starch. contain small amount of proteins, B-vitamins and vitamin C. Yellow sweet potatoes and carrots are rich sources of carotene. Other vegetables - These include green peas and beans, pumpkin, gourds, ladies finger, brinjal, etc. Green peas and beans are good sources of protein , Bvitamins. vitamin C and minerals. .
Fruits Fruits are good sources of different carbohydrates, vitamins and minerals Fresh fruits are, good sources of vitamins. Amla rich in vitamin C.. Yellow fruits, like mango and papaya, contain ß-carotene . • Dried fruits, like dates and raisins, are rich sources of iron. Banana is rich in carbohydrates . fruits contain glucose, fructose or pentoses
Most of the fruits are good sources of potassium. Drying of fruits results in loss of carotene. Canning of fruit juices results in loss of vitamin C. a variety of fruits and vegetables should be included in meals and snacks each day. to provide vitamins and minerals
Milk and milk products Milk is used in the preparation of curd, cheese, icecream, butter, ghee and a variety of sweets. an ideal food for infants and children . good supplementary food for adults . Milk contains good quality proteins It is also rich in calcium and other nutrients milk is considered as a complete food. Milk is, deficient in vitamin C and iron.
Milk, yoghurt and cheese are the most common dairy foods, and main dietary sources of calcium. Fullcream milk is recommended for children aged one to two years, reduced-fat milk is suitable for adults . Pasteurization and prolonged boiling results in loss of thiamin, vitamin B6 and vitamin B12.
Eggs and poultry Eggs contain proteins and fat Egg proteins are good sources of all essential amino acids and have high nutritive value. Egg is also a rich in vitamin A and Bvitamins. Egg, , does not contain vitamin C and is a poor source of calcium. Egg white contains proteins, mainly albumin . And good source of riboflavin
Raw egg white contains a heat labile factor, called avidin , which binds biotin and makes it unavailable .Egg yolk contains about 15% of proteins and 30% of fat . It is a rich source of riboflavin, vitamin A, iron , phosphorus and is rich in cholesterol. It is used as a supplement to the diet of infants . Poultry meat is a good source of proteins , containing all essential amino acids. .
Meat and fish This group includes red meat (such as beef and lamb), white meat ( such as pork and chicken) and fish . They are rich in proteins, iron and zinc. Proteins content of flesh foods is around 20%. Meat is also a good source of vitamin B12, iron and phosphorus. liver , is very rich in vitamins and iron .
Fish is rich in proteins and source of B-vitamins . Fatty fish contains vitamins A and D. Small fishes, are good source of calcium if eaten with bones.Large fishes are rich in phosphorus. Canning of meat and poultry results loss of vitamins.
Fat and oils Fat and oils are the main sources of energy as well as essential fatty acids and fat soluble vitamins. Fat of animal origin contains cholesterol , but is a poor source of vitamin E and essential fatty acids. • fat of vegetable origin , such as sunflower oil, soybeans oil, cottonseed oil, etc., is good source of essential fatty acids and vitamin E.
: Frying destroys vitamin A, vitamin E and essential fatty acids. acidity results in the formation of peroxides, affect intestinal flora and have irritating effects on the intestine. , : Sugar Sugar and other carbohydrate-rich foods serve as a source of energy. Honey and jaggery contain vitamins and minerals
Condiments and spices Condiments and spices are used as seasoning or flavoring agents in food condiments and spices are used in small quantities, improve taste and flavor of the cooked food. They also act on the mucous membranes of mouth, stomach and intestine, and stimulate secretion of digestive juices.
: Some of the condiments, like chilies and coriander, are good sources of carotene . Green chilies supply vitamin C. • Turmeric and tamarind are sources of antioxidants and iron .• garlic have effect on intestinal flora and prevent flatulence . chilies and black pepper., are very pungent.cause irritation of the mucous membrane, , resulting in peptic and duodenal ulcers.
Beverages beverages have different effects.. Coffee and tea contain caffeine, which stimulates gastric secretion and aid in the digestion. Excess of caffeine produces insomnia , causes irritability and rapid heart action, and increases excitability of the nervous system. Tea, is a rich source of oxalic acid., excessive consumption of tea may lead to renal calculi.
Fruit juices contain sugar , vitamin C, small amounts of other vitamins B and minerals.sugarcane juice, contain 9% sugar , sweetened carbonated beverages contain about 10 to 15% sugar Alcohol in moderate doses stimulates gastric secretion Excessive consumption of alcohol causes severe depression and incoordination of movements, and loss of consciousness
COMPOSITION OF A BALANCED DIET • A balanced diet should provide, nearly, 50-60% of the total required calories from carbohydrates , about 10-15 % from proteins and 20-30 % from fats .• a balanced diet should also provide other non-nutrients, such as dietary fibre, antioxidants and phytochemicals
Dietary fibre , includes complex carbohydrates obtained from whole grains, fruits, vegetables, beans and legumes. They are low or moderate in calories, and are devoid of refined grains and sugar. Dietary fiber promotes healthy bowel movement and decreases the risk of chronic diseases, such as coronary heart disease and diabetes.
Antioxidants, such as vitamins C and E, beta-carotene, riboflavin and selenium, protect the body from free radical damage . Spices, like turmeric, ginger, garlic, cumin and cloves , are rich in antioxidants protect against oxidative damage
DIETARY GUIDELINES FOR INDIANS Widespread malnutrition is due to dietary inadequacy and unhealthy lifestyle. factors are poor purchasing , faulty feeding habits, large family size, frequent infections, poor health care, inadequate sanitation and low agriculture production. longterm solution to the problem of malnutrition is ensuring availability, accessbility and consumption of adequate amount of food.
Dietary guidelines help to achieve the objective of providing optimal nutrition to the population. 1, Eat a variety of foods, to ensure a balanced diet. 2. Ensure provision of extra food and health care to pregnant and lactating women. 3. Promote exclusive breastfeeding for 6 months and encourage breastfeeding until 2 years, or as long as possib le
.4. Feed home-based semi-solid foods to the infants after 6 months .5. Ensure adequate and appropriate diets, for children and adolescents, both, in health and sickness .6. Eat plenty of vegetables and fruits .7. Ensure moderate use of edible oils and animal foods, and use a minimum of ghee butter/vanaspati .8. Avoid overeating, to prevent overweight and obesity .9. Exercise regularly, and be physically active, to maintain ideal body weight.
10. Restrict salt intake to a minimum. 11. Ensure the use of safe and clean foods. 12. Adopt the right pre-cooking processes and appropriate cooking methods. 13. Drink plenty of water and take beverages in moderation .14. Minimize the use of processed foods rich in salt, sugar and fat .15. Include micronutrient-rich foods in the diets of elderly people, to enable them to be fit and active.
FOOD PYRAMID Food pyramid (Food guide pyramid) is a graphic representation of the number of servings from the four major food groups, needed daily, to form a healthful diet.
The pyramid is divided into four levels of foods, according to recommended consumption, .• At the base, the group of cereals and legumes/ beans, which should be eaten in sufficient quantity. Foods in this group are the sources of complex carbohydrates and vitamins, minerals and fibre . Dietary fibre delays and retards absorption of carbohydrates and fats, and increases the satiety value.
Diets rich in fibre also reduce glucose and lipids in blood, and increase the bulk of the stools. • On the second level ( going up the pyramid) vegetables and fruits Vegetables provide vitamins (such as vitamin A, vitamin C and folate) and the minerals (like iron and magnesium) and carbohydrates , including fiber.
the third level, are dairy foods , meat and meat alternatives meat and meat alternatives e.g. nuts, eggs and legumes), i.e. foods and oils from the animal sources, which should be eaten moderately. Dairy products provide proteins, vitamins and minerals Meat and meat substitutes are good sources of proteins, Bvitamins, iron and zinc
combination of cereals, millets and pulses provides most of the amino acids and provide better quality protein The upper part of the pyramid contains fat and sweets . the highly processed foods, which should be eaten sparingly .Excess of these substances could lead to obesity, diabetes, cardiovascular disease and cancer.
Food pyramid
BALANCED DIET FOR INDIANS diet must provide adequate calories, proteins and micronutrients to achieve maximum growth potential. appropriate diet during different stages of life is important, Breast milk a nd energy-rich foods for growth and appropriate milestones.
Energy-rich body building and protective foods for growth and development, and to fight infections for growth spurt, maturation and bone development . Nutritionally adequate diet , with extra food for child bearing and rearing for maintaining health, to prevent diet-related diseases, and to support pregnancy and lactation. .• Nutrients-dense low fat foods for being physically active and healthy.
For planning the menu for balanced diets, following points should be considered: 1. ) For all nutrients, minimum recommended dietary allowance must be met Energy derived from cereals should not be more than 75 per cent include two cereals in one meal, , like rice and wheat, or millets and rice.
Whole grain cereals, par-boiled grains give higher nutritive value . Flour should not be sieved , as it reduces bran content. Minimize the use of refined cereals, like white flour (maida).
2. ) Variety of foods should be used in the menu. No single food has all the nutrients. , each meal should consist of all the food groups. 3. ) To improve the protein quality from plant sources, ratio of proteins from cereal to pulse should be eight parts of cereals and one part of pulses. .
Two to three servings of pulses should be taken every day. Germinated pulses are more nutritious. One egg can be served along with cereals and pulses, to improve the quality of proteins. , one serving of poultry/fish can be included
4. Choose a diet low in fat , 15-20 percent of the total calories (energy) should be derived from fat and oils, and 5 percent from sugar and jaggery. It is better to use more than one type of oil. Combination of oils should be there to have proper balance of 0-3 and 0-6 fatty acids . avoid Fried food
5. Food rich in fiber should be included in the diet. Green-leafy vegetables should be taken more than one serving Five servings of fruits and vegetables should be included in a day's diet to meet the requirement of antioxidants ,6. Every meal s hould contain at least one medium size raw fruit . Taking juice out of it may cause loss of some nutrients, like vitamin C
7. About two glasses of low-fat milk should be included. Curd should be consumed to provide probiotics 8. Use salt and sugar in moderation 9. Water should be taken in adequate quantity. 10. the number of meals should four. For very young children an d patients, number of meals can be mo re 11. One-third of the nutritional requirem ent of calories and proteins, should be met by lunch and dinner.
12. For quick calculations, food exchange list can be used. If possible, meals should be planned, at a time, for several days. 13. reduce use of processed and ready to eat foods as it food contains a variety of food additives. 14. To children and patients , whose nutritional requirements are high, supplementary foods can be given