| Course | HLTH 4320 Nutrition Across the Lifespan |
|---|---|
| Week | Week 3 |
| Paper type | Life stage brief |
| Length | About 700 words, 5 pages |
| Format | APA 7 student paper |
| School | Walden University |
| Program | BS in Public Health |
| Updated | October 2026 |
Free sample paper for HLTH 4320 Week 3
Nutrient Needs in Pregnancy, Lactation and the First Year: Four Nutrients, Each Value Kept With the Group It Belongs To
Student Name
Walden University
HLTH 4320: Nutrition Across the Lifespan
Instructor Name
Month Day, Year
Nutrient Needs in Pregnancy, Lactation and the First Year: Four Nutrients, Each Value Kept With the Group It Belongs To
Summary
Pregnancy, lactation and infancy are where reference values split into narrow groups, and where a value quoted for the wrong group can mislead. This brief covers four nutrients that guidance singles out across these stages: folate, iron, iodine and vitamin D. For each, it states the reference value or recommendation, the exact group it applies to and its source. Two points recur. Some recommendations apply before pregnancy begins, not only during it. And several infant recommendations depend on how the infant is fed.
Folate Before and During Pregnancy
Anyone planning a pregnancy, or able to become pregnant, should take 0.4 to 0.8 mg (400 to 800 µg) of folic acid every day, according to an A-graded federal task force recommendation (US Preventive Services Task Force, 2023). The group is defined by the possibility of pregnancy, not by pregnancy itself, because the neural tube closes in the first weeks after conception, often before a pregnancy is known. The Task Force estimates that about 3,000 pregnancies in the United States are affected by neural tube defects each year. During pregnancy, the Recommended Dietary Allowance for folate rises to 600 µg of dietary folate equivalents a day, compared with 400 µg for nonpregnant adults (Institute of Medicine, 2006).
Iron
The jump in the infant value at 7 months reflects the depletion of iron stores built before birth and the small amount of iron in breast milk. Pediatric guidance warns that low iron in infancy can harm brain development for the long term, and it sets out iron intakes and screening practices for infants and toddlers (Baker & Greer, 2010). Its guidance distinguishes breastfed from formula-fed infants, because iron-fortified formula supplies iron that breast milk does not; for exclusively breastfed infants, it recommends a daily iron supplement of 1 mg per kilogram of body weight starting at 4 months until iron-rich complementary foods are eaten.
Table 1
Iron Reference Values by Group
| Group | Value | Type | |
|---|---|---|
| Women 19 to 50, not pregnant | 18 mg per day | RDA | |
| Pregnancy, 19 to 50 | 27 mg per day | RDA | |
| Lactation, 19 to 50 | 9 mg per day | RDA | |
| Infants 0 to 6 months | 0.27 mg per day | AI | |
| Infants 7 to 12 months | 11 mg per day | RDA | |
Values from the Dietary Reference Intakes compiled in the 2006 essential guide. The lactation value is lower than the nonpregnant value because menstruation usually has not resumed.
Iodine
The RDA for iodine rises from 150 µg a day for nonpregnant adults to 220 µg in pregnancy and 290 µg during lactation (Institute of Medicine, 2006). Iodine is needed for thyroid hormone, which the fetus depends on for brain development. The lactation value is the highest of any life stage because iodine passes into breast milk.
Vitamin D in Infancy
For infants, the reference value for vitamin D, as revised in 2011, is an Adequate Intake of 400 IU a day (Institute of Medicine, 2011). Breast milk usually contains little vitamin D, so the American Academy of Pediatrics recommends that breastfed and partially breastfed infants receive a supplement of 400 IU a day, starting in the first few days of life (Wagner & Greer, 2008). Infants fed enough vitamin D-fortified formula may not need the supplement. Here too, the recommendation depends on how the infant is fed, not only on age.
Feeding Pattern as a Grouping Variable
Pediatric guidance calls for about six months of breast milk alone, then complementary foods from around six months, and continued breastfeeding for two years or beyond as long as mutually desired (Meek & Noble, 2022). Because iron and vitamin D guidance differ by feeding pattern, any statement about an infant's needs should name the group it applies to: breastfed, formula-fed or mixed, and the age in months.
What This Brief Does Not Cover
The brief does not address energy and protein needs, which rise in the second and third trimesters, or nutrients of concern for specific diets, such as vitamin B12 for vegans. It covers healthy pregnancies and term infants; preterm infants and pregnancies with complications have different needs set by clinical guidance.
References
Baker, R. D., & Greer, F. R. (2010). Diagnosis and prevention of iron deficiency and iron-deficiency anemia in infants and young children (0-3 years of age). Pediatrics, 126(5), 1040-1050. https://doi.org/10.1542/peds.2010-2576
Institute of Medicine. (2006). Dietary Reference Intakes: The essential guide to nutrient requirements (J. J. Otten, J. P. Hellwig, & L. D. Meyers, Eds.). The National Academies Press. https://doi.org/10.17226/11537
Institute of Medicine. (2011). Dietary Reference Intakes for calcium and vitamin D (A. C. Ross, C. L. Taylor, A. L. Yaktine, & H. B. Del Valle, Eds.). The National Academies Press. https://doi.org/10.17226/13050
Meek, J. Y., & Noble, L. (2022). Policy statement: Breastfeeding and the use of human milk. Pediatrics, 150(1), Article e2022057988. https://doi.org/10.1542/peds.2022-057988
US Preventive Services Task Force. (2023). Folic acid supplementation to prevent neural tube defects: US Preventive Services Task Force reaffirmation recommendation statement. JAMA, 330(5), 454-459. https://doi.org/10.1001/jama.2023.12876
Wagner, C. L., & Greer, F. R. (2008). Prevention of rickets and vitamin D deficiency in infants, children, and adolescents. Pediatrics, 122(5), 1142-1152. https://doi.org/10.1542/peds.2008-1862
What the HLTH 4320 Week 3 instructions ask for
For Week 3 the task is a brief on nutrient needs during one or more early life stages, written for readers who will use it to plan or advise. Choose a small number of nutrients and justify the choice. For each, give the reference value or recommendation, name the precise group it applies to and cite the report or agency that sets it. Pregnancy, lactation and infancy can share a brief if each value stays attached to its own group. Where professional guidance adds something the reference tables do not, such as supplements, include it and say who issued it. Most prompts limit the brief to two or three pages with headings, and some allow or require a table. Close with what the brief leaves out, so that readers do not stretch it to cases it was never meant to cover.
Inside the HLTH 4320 Week 3 example
A summary opens the brief and names the two points that recur: some advice starts before pregnancy, and infant advice depends on feeding. The folate section separates the Task Force's 0.4 to 0.8 mg folic acid recommendation for anyone who could become pregnant from the 600 microgram allowance during pregnancy. Table 1 sets out iron values for five groups, and the note under it explains why the lactation figure falls to 9 mg. Paragraphs on iodine and on infant vitamin D follow, the latter citing the 400 IU supplement for breastfed infants from Wagner and Greer. A short section makes feeding pattern an explicit grouping variable, using the breastfeeding policy statement by Meek and Noble. The brief ends by listing what it does not address: energy, protein, vegan diets, preterm infants and complicated pregnancies.
Reading the HLTH 4320 Week 3 rubric
Briefs in this course are graded mostly on accuracy of values, correct grouping and the quality of sources. A value assigned to the wrong group, such as the pregnancy iron figure applied during lactation, counts as a content error even when the number itself is right. Faculty look for official sources: the National Academies reports, the Task Force and the American Academy of Pediatrics carry more weight than secondary websites. Concise writing earns marks too, because a brief that runs to five pages is no longer a brief. A table adds value once it carries an APA table number, an italic title and a note beneath. Higher ratings go to briefs that explain why a value changes, for example why infant iron jumps at seven months. Several sections grade the limits paragraph separately, and reference entries need DOIs where the source has one.
Common HLTH 4320 Week 3 mistakes, and how to avoid them
The most frequent error here is quoting a supplement recommendation as if it were a dietary allowance. Folic acid tablets and dietary folate equivalents are measured differently, and the brief keeps them apart. A second mistake is giving one infant iron figure for all babies, when breastfed and formula-fed infants receive different guidance. Students also notice that the lactation iron value is lower than the nonpregnant one and assume a typo. Check every number against the source table, not against a classmate's post. If your prompt names a different life stage or nutrient, keep the same structure: value, group, source, then reason. Write the limits paragraph last, after you know what you have covered. For a brief on another set of nutrients, send the request with the life stages your instructor assigned and the page limit.
Get a HLTH 4320 Week 3 example written to your instructions
Send the desk the prompt and rubric for the brief, and a sample covering the same stage returns within 24-48h. Your first custom sample is free. A sample is not a substitute submission: your section grades what you wrote, and the model exists to show the finished shape and the sourcing pattern behind it.
More HLTH 4320 papers and BS in Public Health samples
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HLTH 4320 Week 3 questions, answered
Where can I find a free HLTH 4320 Week 3 sample paper?
This page has a complete Week 3 brief on folate, iron, iodine and vitamin D across pregnancy, lactation and infancy, with an iron table and six APA references, free to read.
Why does the folic acid advice in the HLTH 4320 Week 3 brief start before pregnancy?
The neural tube closes in the first weeks after conception, often before a pregnancy is known, so the Task Force applies its advice to anyone who could become pregnant.
Why is the iron allowance lower during lactation?
The lactation value of 9 mg is below the 18 mg set for nonpregnant women because menstruation usually has not resumed while breastfeeding, so monthly losses are absent.
Does the brief say breastfed babies need vitamin D drops?
Yes. It cites the American Academy of Pediatrics advice of 400 IU daily for breastfed and partially breastfed infants from the first days, since breast milk holds little vitamin D.
Can pregnancy and infancy be covered in one brief?
They can, as this sample shows, provided each number names its own group, such as pregnant women aged 19 to 50 or exclusively breastfed infants under six months old.