Milly Gaines
Infancy is a period of rapid growth and development, second only to the fetal period. Therefore, it is crucial to meet the nutritional requirements of infants to ensure optimal growth and organ development. The nutritional requirements of infants vary depending on factors such as gestational age, stage of growth, and health conditions. Breast milk or formula milk is sufficient to meet an infant's nutritional needs for the first six months of their life. After this period, complementary feeding is necessary to meet their increasing energy and nutrient demands. This transition involves introducing pureed, mashed, and semi-solid foods, gradually progressing to finger foods and nutrient-dense family meals by the age of one. Caregivers should be responsive to the infant's hunger cues and encourage a healthy eating environment.
| Characteristics | Values |
|---|---|
| Energy requirements | 30-50 kcal/kg/day; boys usually require more energy than girls |
| Nutritional requirements | Optimized nutrition to ensure adequate growth and organ development; preterm and sick infants require higher amounts of energy; nutritional requirements decrease as infants get older |
| Vitamin supplementation | Vitamin K injection at birth; vitamin D supplementation for breastfed and formula-fed infants if intake is less than 400 IU per day; vitamin B-12 supplementation for breastfed infants whose mothers are vaginal |
| Iron supplementation | Iron stores are exhausted at around 6 months, so infants need to begin consuming iron-fortified solid foods |
| Fluoride supplementation | Formula-fed infants should receive supplementation after 6 months of age if intake from tap water, foods, and toothpaste is inadequate; breastfed infants may also need supplementation after 6 months |
| Protein intake | About half of the total protein intake should come from essential amino acids |
| Food introduction | Introduce complementary foods at 6 months in addition to breast milk; wait about a week between introducing new solid foods |
| Food consistency and variety | Gradually increase consistency and variety as the infant gets older; pureed, mashed, and semi-solid foods at 6 months; "finger foods" at 8 months; most children can eat the same foods as the rest of the family by 12 months |
| Food safety | Avoid foods that may cause choking, such as whole grapes or raw carrots; limit juice to avoid displacing more nutrient-rich foods; avoid drinks with low nutrient value, such as tea, coffee, and sugary soft drinks |
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What You'll Learn
Iron-fortified solid foods are needed after 6 months
Iron is an essential nutrient for an infant's development, and it is important to ensure that they are getting enough of it in their diet. Iron stores from birth typically last for the first 4-6 months of life. After this period, it becomes crucial for infants to start consuming iron-fortified solid foods to meet their growing needs.
The recommended daily amount of iron for infants is 11 mg, but it's important to note that not all iron is absorbed equally. Iron found in food comes in two forms: heme and non-heme iron. Heme iron is found in animal-based foods like meat, fish, and poultry, while non-heme iron is present in plant-based sources such as beans, lentils, and dark green leafy vegetables. Pairing non-heme iron sources with vitamin C-rich foods can enhance absorption.
Breast milk provides most of the nutrients a baby needs, but it is not a significant source of iron. Therefore, breastfed infants may require additional iron-fortified solid foods or supplements to meet their daily requirements. On the other hand, most commercial infant formulas are fortified with iron, so formula-fed babies may depend less on solid foods for their iron intake. However, it is still important to introduce iron-rich solid foods as they start eating solids.
When introducing solid foods, parents can choose from a variety of iron-fortified options, including infant cereals, bread, and pasta. Additionally, natural food sources such as beans, lentils, and dark green leafy vegetables are excellent sources of iron. Cooking with cast iron cookware can also increase the iron content of meals. It is always recommended to consult with a pediatrician or dietitian for individualized guidance, as iron needs can vary depending on age, medical status, and diet.
In summary, iron-fortified solid foods are crucial for infants after 6 months of age to ensure they receive adequate iron for their growth and development. By offering a variety of iron-rich foods and incorporating vitamin C-rich foods, parents can support their infants' nutritional needs and set them up for a healthy start in life.
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Breast milk and complementary foods
Breast milk is the ideal food for newborns, providing them with perfect nutrition and protection against infection and death. Breastfeeding is also beneficial for mothers, as it lowers their risk of type 2 diabetes, breast cancer, and ovarian cancer. According to the World Health Organization (WHO), babies should be exclusively breastfed for the first six months of their lives. After this period, complementary foods can be introduced alongside continued breastfeeding up to two years old or beyond.
Breast milk is produced on a supply-and-demand system, so the more often a mother feeds her baby, the more milk she will produce. Mothers can also take steps to increase their milk supply, such as staying hydrated, eating a balanced diet rich in fruits, vegetables, whole grains, and protein, and consuming foods traditionally believed to boost milk supply, like fenugreek seeds and blessed thistle. However, it is important to note that alcohol decreases milk production and should be consumed in moderation.
Complementary feeding, or the introduction of solid foods, should not begin until the infant is ready, typically around six months. This is because, before six months, breastfeeding or formula feeding can meet all of an infant's nutritional needs. One sign that an infant is ready for solid foods is if they are breastfeeding more than eight to ten times per 24 hours. Additionally, iron stores are typically exhausted at around six months, so infants need to begin consuming iron-fortified solid foods at this time.
When introducing complementary foods, it is important to wait about a week between introducing new food items to identify any food allergies or intolerances. Vitamin supplementation may also be necessary, such as vitamin D for both breastfed and formula-fed infants if their vitamin D intake is insufficient.
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Vitamin D supplementation
Newborn infants are at a high risk of vitamin D deficiency, and vitamin D supplementation is highly recommended to prevent this and conditions such as rickets. This is true for both breastfed and formula-fed infants, as vitamin D intake from these sources may be inadequate.
Vitamin D is a fat-soluble vitamin that exists in two forms: vitamin D3 (cholecalciferol), the mammalian form, and vitamin D2 (ergocalciferol), the fungal form. Infants have a limited amount of vitamin D at birth, which is transferred from the mother during pregnancy. After birth, vitamin D can be obtained by the infant through the mother's milk, but the amount is small (0.5-1.8 micrograms per litre).
Vitamin D can also be synthesised in the skin when exposed to ultraviolet beta solar radiation. However, this is dependent on geographical location, as beta radiation is too low to enable vitamin D production during the fall and winter months in regions north of 37 degrees latitude or south of 37 degrees latitude. In addition, melanin pigmentation in the skin absorbs beta radiation, reducing vitamin D production in those with darker skin.
Due to these factors, vitamin D supplementation is often necessary to ensure adequate vitamin D intake. The American Academy of Pediatrics recommends that infants receive 400 IU of supplemental vitamin D until their vitamin D intake from food sources reaches this level.
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Fluoride supplementation
Fluoride is a mineral that helps prevent caries and can repair teeth in the very early, microscopic stages of the disease. Fluoride supplementation is recommended for infants if their fluoride intake from tap water, foods, and toothpaste is inadequate. Fluoride supplements are available as drops, chewable tablets, and lozenges. The use of these supplements should be determined by a dentist or other health professional.
According to the American Academy of Pediatrics (AAP), fluoride supplements can be provided to babies. However, it is generally recommended that fluoride supplementation for infants should only be considered from the age of six months. This is because, before this age, babies do not have teeth, and fluoride acts topically on the teeth to prevent caries and repair tooth enamel. Therefore, it is crucial to wait until the baby's teeth have erupted before considering fluoride supplementation.
The decision to start fluoride supplementation should be based on several factors. Firstly, if the concentration of fluoride in drinking water is less than 0.3 ppm, supplementation may be recommended. Secondly, if the infant does not brush their teeth at least twice a day, they may benefit from supplementation. Lastly, if a dentist or health professional determines that the child is at high risk for caries due to family history or community trends, for example, fluoride supplementation may be advised.
It is important to note that excessive fluoride intake can lead to stomach pain, indigestion, diarrhoea, or fluorosis, a condition marked by white spots on baby teeth. Therefore, it is crucial to work with a dentist or local health department to determine the appropriate dosage of fluoride supplementation based on the child's drinking water fluoride level and age. Fluoride drops, for example, can provide a safe and effective way to deliver a systemic dose of fluoride that is appropriate for the infant's age and weight.
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Nutritional requirements of preterm infants
Preterm infants have higher nutritional needs than term infants, requiring more proteins, energy, minerals, vitamins, and trace elements. While human milk is recommended as the first choice for feeding preterm infants due to its beneficial effects on health and growth outcomes, it may not be sufficient to meet their higher nutrient requirements.
Fortified human milk, preferably from the infant's mother, is the preferred nutrition for preterm infants. This can be achieved by adding human milk fortifiers to expressed breast milk without increasing the osmolality of the milk. A higher protein and higher calorie strategy can help optimise nutrition in preterm infants. The addition of human milk fortifiers provides approximately 4 g/kg/day of protein and 3.5–4 g/kg/day of fats, helping to meet the calorie requirements of preterm infants.
Parenteral nutrition may be used as an adjunct to enteral feeding in critical cases, but it is generally recommended to initiate enteral feeding early to achieve faster weight gain, shorter hospital stays, and reduced complications such as osteopenia of prematurity and jaundice. Early initiation of enteral feeding (<48 hours after birth) has been associated with better outcomes compared to late initiation (>72 hours after birth).
Rapid advancement of enteral feeding in preterm infants has been linked to achieving full enteral feeding and regaining birth weight faster, as well as a shorter hospital stay, without increasing the risk of complications. However, it is important to monitor serum calcium, phosphorus, and alkaline phosphatase levels to prevent hypercalcemia and detect osteopenia of prematurity.
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Frequently asked questions
The World Health Organization (WHO) recommends that infants start receiving complementary foods at 6 months of age in addition to breast milk.
Some signs that indicate an infant is ready for solid foods include consuming more than 32 ounces of infant formula per 24 hours, reaching a weight of at least 13, and breastfeeding more than 8-10 times per 24 hours.
Some strategies to prevent tooth decay in infants include having them drink from a cup instead of a bottle, not propping up the bottle in an infant seat, and not putting the infant to bed with a bottle.
The nutritional requirements of preterm infants vary with gestational age and growth stage. Optimizing nutrition for preterm infants focuses on providing optimal caloric content, protein, macronutrients, micronutrients, and electrolytes.
Certain pathological conditions that can interrupt an infant's growth include gastroesophageal reflux, constipation, milk protein intolerance or allergy, and lactose intolerance, often requiring dietary modifications.
