Revised D-A-CH-reference values for the intake of zinc

Area of Science:

• Nutritional Science
• Human Physiology
• Dietary Reference Values

Background:

• The Nutrition Societies of Germany, Austria, and Switzerland jointly revised the D-A-CH reference values for nutrient intake.
• The latest revision specifically addresses updated reference values for zinc intake, published in July 2019.

Purpose of the Study:

• To establish updated, evidence-based reference values for zinc intake across various population groups.
• To provide guidance on adequate zinc consumption considering physiological needs and dietary factors.

Main Methods:

• For infants (0-4 months), estimated values were derived from breast milk zinc content.
• For other age groups, the factorial method was employed, accounting for endogenous losses (intestinal, urine, feces, skin, sweat, semen) and growth requirements.
• Adult recommendations were stratified based on low, moderate, and high phytate intake levels due to its impact on zinc absorption.

Main Results:

• Recommended zinc intake values for adults, pregnant, and lactating women range from 7 mg/day to 16 mg/day.
• Recommendations vary based on sex, age, physiological state (pregnancy, lactation), and dietary phytate levels.

Conclusions:

• The revised D-A-CH reference values provide updated guidance for zinc intake.
• These values are crucial for maintaining adequate zinc status and preventing deficiencies across diverse populations.