Meals to Improve Absorption of Iron Supplements

Pennington Biomedical Research Center59 enrolled

Overview

One of the targeted objectives of Healthy People 2020 is to reduce iron deficiency among women of reproductive age (WRA). Consuming foods rich in iron and/or oral iron supplementation is typically recommended to improve iron status; however, global rates of iron deficiency remain high. Thus, nutritional strategies to improve/maintain iron status are warranted. Dietary iron is found in two different forms: heme and non-heme iron. Non-heme iron is found in plant-based sources and is commonly used as a supplement and food fortificant. Absorption of non-heme iron is low compared to heme iron, which is found in animal sources, such as beef. Studies have also demonstrated that beef contains an unidentified factor that stimulates the absorption of non-heme iron. The primary objective of the proposed study is to determine the effects of incorporating daily meals containing beef or plant-based alternative with or without an iron supplement on indicators of iron status in iron-deficient WRA.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Iron-deficiency Iron Deficiency Anemia Iron Deficiency Anemia Treatment

Eligibility

Sex: FEMALEMin age: 18 YearsMax age: 40 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Body mass index (BMI) falls within the normal weight or overweight range (18.5-29.9 kg/m\^2) * Low iron stores (serum ferritin \<25 μg/L) * Willing to refrain from smoking and \>2 alcoholic drinks/week for the duration of the study period * Willing to refrain from vitamin and mineral supplementation for the duration of the study Exclusion Criteria: * Currently smoking or vaping * Currently taking a medication that interferes with micronutrient metabolism * Unwilling to refrain from vitamin and mineral supplementation for the duration of the study * Restrictive diets (i.e., vegan or vegetarian diets) * Metabolic or cardiovascular abnormalities (e.g., kidney disease, diabetes, cardiovascular disease, etc.) * History of any disease or abnormality of the gastrointestinal tract including, but not limited to, diverticulosis, diverticulitis and inflammatory bowel disease, peptic ulcer disease, Crohn's disease, ulcerative colitis; or previous gastrointestinal surgery * Blood donation within 4 months of beginning the study * Abnormal blood clotting

Outcomes

Primary Outcomes

Iron status

Plasma ferritin, soluble transferrin receptor, transferrin saturation, hemoglobin and hematocrit will be measured to determine iron status. Changes in measures of iron status during the intervention will be compared between groups.