Study Examines Milk’s Role in Height Growth

Importance of Height and Nutrition

A recent study published in the Journal of Nutrition investigated whether milk contributes significantly to height growth. Height and weight serve as indicators of overall health, with expected adult height potentially influenced by nutritional factors. Failure to achieve anticipated height can signal malnutrition or underlying health issues.

Research Focus on Height

Researchers in the United States highlighted that while weight receives considerable focus in nutrition-related studies, height often lacks similar attention. The study utilized longitudinal data to assess how various beverages affect an individual’s potential for height growth.

The Beverage Study

Data Collection Methods

The research drew from the Iowa Fluoride Study and the Iowa Bone Development Study, where parents documented their children’s dietary intake through food diaries every three to six months until the children reached eight and a half years old. After that, food frequency questionnaires were administered biennially to monitor nutrient consumption. Parents completed weekly surveys specifically for beverage intake.

Beverage Categories and Findings

Participants’ beverage options included water, sugar-free options, sugar-sweetened drinks, milk, and 100% fruit juice. Height measurements were taken when the children were five years old and subsequently every two years until they were 17. Results indicated that, as the children aged, their consumption of water, sugar-free beverages, and sugar-sweetened drinks increased, while their intake of 100% fruit juice decreased. Notably, milk consumption remained stable throughout these years.

The study found that milk was the only beverage linked to increased height after adjusting for factors such as socioeconomic status, age, sex, dietary quality, and total energy intake. Daily intakes of 8 ounces and 16 ounces of milk corresponded to heights that were 0.39 cm and 0.78 cm above projected heights, respectively.

Milk’s Nutritional Benefits

Calcium’s Role in Growth

The study also examined the nutrient adequacy ratio (NAR), which compares actual nutrient consumption to recommended levels based on sex and age. Researchers observed a significant relationship between the NAR for calcium and height, reinforcing the connection between milk intake and calcium levels.

Study Limitations

Despite the predominance of white participants and potential inaccuracies in self-reported dietary data, the findings suggest that milk, particularly its calcium content, plays a vital role in promoting healthy growth and aiding individuals in reaching their height potential.

Reference

Marshall, T.A., Curtis, A.M., Cavanaugh, J.E., Warren, J.J., and Levy, S.M. (2018). Higher Longitudinal Milk Intakes Are Associated with Increased Height in a Birth Cohort Followed for 17 Years. The Journal of Nutrition, 148(7), 1144-1149. https://doi.org/10.1093/jn/nxy071