Perspective: Appraisal of the Evidence Base to Update DRI Values-Lessons from the Past, Thoughts for the Future

Area of Science:

• Nutritional Science
• Evidence Synthesis
• Public Health Policy

Background:

• Establishing evidence-based nutrient guidance, such as Dietary Reference Intakes (DRIs), is critical but faces challenges.
• Recent DRI re-evaluations for vitamin D, calcium, sodium, and potassium highlight the need for comprehensive systematic reviews.

Purpose of the Study:

• To tabulate studies used in systematic reviews for DRI re-evaluations.
• To summarize evidence and identify limitations for future DRI committee work.
• To inform prospective research funding to better support DRI updates.

Main Methods:

• Systematic reviews commissioned by federal agencies.
• Analysis of studies supporting DRI reviews for specific nutrient groups.
• Evaluation of data reporting consistency and representation across demographic factors.

Main Results:

• Inconsistent age reporting in studies, not aligning with current DRI categories.
• Limited data available for specific life stages, notably pregnancy and lactation.
• Varied study interventions complicate data synthesis for DRI derivation.
• Under-representation of race/ethnicity and overweight/obesity data.

Conclusions:

• Existing study data present challenges for accurate DRI re-evaluation due to inconsistent reporting and demographic gaps.
• Targeted research funding is recommended to generate data that directly supports future DRI updates.
• Addressing data limitations is crucial for refining nutrient guidance for diverse populations.