Balanced diet and Recommended Dietary Allowances

Option A is correct because a low-sodium diet is more likely to be followed when food remains enjoyable. Herbs, spices without added salt, lemon, garlic, onion, roasting, and suitable cooking methods can improve flavour without defeating the sodium restriction. Better acceptability supports adherence, adequate intake, and the long-term therapeutic goal.

Vitamin C is needed for collagen synthesis, an important process in forming and strengthening connective tissue during wound repair. It also supports normal immune function and helps maintain tissue integrity. Adequate protein, energy, zinc, and other nutrients are also important, so vitamin C should be provided as part of a balanced, clinically appropriate plan.

A diet that is unnecessarily restrictive, expensive, unfamiliar, or difficult to prepare is less likely to be followed over a long period. For patients managing a diet at home, realistic choices, cultural preferences, affordability, and gradual changes should be considered. Individualized counselling can preserve therapeutic goals while improving adherence.

Calcium is necessary for bone mineralisation, but it works within a broader system. Vitamin D supports calcium absorption and bone metabolism, adequate protein supports the bone matrix and muscle, and weight-bearing exercise stimulates bone strength and reduces falls. Advice should also consider overall diet, sunlight or prescribed vitamin D, age, medicines, smoking, and individual medical needs.

The direct answer is A: blood glucose may become too low. Insulin helps move glucose from the blood into body cells, thereby lowering the glucose level in the bloodstream. If a person takes insulin and then skips or greatly delays a meal, less glucose may enter the body from food while the insulin effect may continue. This mismatch can cause hypoglycaemia, or abnormally low blood glucose. Possible warning signs include sweating, shaking, hunger, weakness, dizziness, confusion, or loss of consciousness. A is correct because it describes the real risk. B is wrong because insulin and missed meals do not make bones grow immediately. C is wrong because food colour has no connection with this blood-glucose mechanism. D is scientifically impossible and unrelated. The exact meal and medicine plan must be decided with a healthcare professional; a patient should not change insulin doses independently. Memory cue: insulin lowers blood glucose, so insulin plus too little food can mean glucose goes too low.

A balanced diet supplies energy, protein, fats, vitamins, minerals, fibre, and water in suitable amounts and proportions. It uses variety from different food groups to support growth, tissue repair, immunity, activity, and normal body functions. Merely filling the stomach or eating sweets cannot meet these needs, so C is correct.

Dietary fibre is the largely indigestible part of plant foods. It absorbs or holds water, adds bulk to stool, and supports movement through the intestine, thereby helping regular bowel movements and reducing constipation risk. Iron is central to haemoglobin formation, calcium and vitamin D support bones, and water regulates temperature. Thus, A is correct.

Recommended Dietary Allowance, or RDA, is the daily intake level of a nutrient considered sufficient to meet the needs of nearly all healthy people in a particular age, sex, or physiological group. It guides menu planning and evaluation, but individual needs can vary with illness, activity, pregnancy, and other conditions. B is correct.

A healthy eating pattern includes a variety of foods from different groups, such as cereals, pulses, milk or alternatives, vegetables, fruits, nuts, and suitable amounts of fats. Variety and appropriate portions help supply energy, protein, vitamins, minerals, and fibre. A diet made only of sweets or fried foods is unbalanced, while regularly skipping meals is also unhealthy. Therefore, A is correct.

Food groups classify foods that provide similar major nutrients and help a planner include variety in suitable proportions. Using groups makes it easier to check whether a meal pattern contains cereals or other energy foods, pulses or other protein sources, vegetables, fruits, milk foods, and appropriate fats. This supports a balanced diet rather than repetitive or nutrient-poor choices, so option A is correct.

Portion control means choosing an appropriate quantity of food rather than automatically eating very large or very small servings. It helps match energy intake with needs, prevents excessive calorie consumption, and supports adequate—not excessive—nutrient intake. Along with food quality and physical activity, sensible portions can assist weight management and reduce the risk associated with overeating. Therefore, option A is correct.

Dietary variety means choosing different foods from different groups rather than depending on one or two foods. Since foods differ in their protein, vitamins, minerals, fibre and energy content, variety improves the chance of meeting the body’s many nutrient needs. It is therefore an important feature of a balanced diet.

Protein complementation means combining two plant protein sources whose limiting essential amino acids complement each other. For example, cereals are commonly combined with pulses. The mixture can provide a more favourable essential-amino-acid pattern than either source alone, improving the overall quality of a vegetarian meal.

Low-nutrient-density snacks may contain considerable calories from sugar or fat but relatively little protein, fibre, vitamins, or minerals. Frequent intake can displace balanced meals, promote excess energy consumption, and increase the risk of unhealthy weight gain and nutrient deficiencies. They are often described as providing “empty calories.”

Micronutrients, mainly vitamins and minerals, are needed in small amounts but regulate many essential processes. They support enzyme activity, immunity, blood formation, bone development, nerve function and metabolism. They do not primarily supply calories; their major role is regulation and protection.

Economic status affects which foods a family can regularly purchase, so a good diet plan must be nutritious as well as affordable and realistic. It can use seasonal produce, cereals, pulses, milk alternatives, and other locally available foods instead of assuming that expensive foods are necessary.

Recommended dietary allowances are reference levels designed for people in particular age, sex, and physiological groups. Requirements can change during childhood, adolescence, pregnancy, lactation, and older age, and may also reflect activity or health conditions. Therefore, one allowance cannot suit every person.

Adequate quantity does not guarantee adequate quality. If a diet repeatedly lacks fruits, vegetables, pulses, milk products, nuts, or other food groups, it may fail to supply important vitamins and minerals. Therefore, a person can consume enough calories yet remain at risk of micronutrient deficiency.

A balanced diet supplies adequate energy and all essential nutrients in suitable proportions. Its composition depends on age, sex, activity level, physiological condition, health status, and sometimes cultural or economic factors. It is not necessarily expensive, merely filling, or always low in calories; therefore option D is correct.

Energy requirements are influenced by physical activity as well as age, body size, sex, and physiological condition. A person performing heavy physical work uses more energy for muscular activity and may therefore need greater energy intake than a similarly aged sedentary person. Need is not created simply by eating less or drinking water.

Energy content and nutrient quality are different characteristics. A food may provide many calories, particularly from sugar or fat, while supplying very little protein, fibre, vitamins, or minerals. Such a food is energy-dense but nutritionally poor and cannot by itself be called a complete balanced or protective food.

Nutrient requirements change across the life cycle. Children need nutrients for growth, adolescents have increased growth demands, pregnancy requires additional nutrients for the mother and foetus, and older adults may need nutrient-dense foods with attention to digestion and chronic disease. Therefore meal planning must consider life stage rather than give everyone the same diet.

Pregnancy is a special physiological state in which the mother must support her own body as well as the growth and development of the fetus. Therefore, requirements for energy, protein, iron, folate, calcium and other nutrients may increase. A normal adult diet may not supply these additional needs unless it is suitably modified.

Sprouting activates enzymes and begins natural biochemical changes in seeds and pulses. These changes can improve digestibility and may increase the availability of certain nutrients, while reducing some antinutritional factors. Sprouting does not make every nutrient increase automatically, so hygienic conditions and suitable storage remain essential.

Portion control means choosing an amount of food that suits a person's energy and nutrient requirements. Very large portions may lead to excess energy, sugar, fat or sodium, while very small portions may cause inadequate nutrient intake. Appropriate portions therefore support balance, weight management and adequate nourishment.