WS/T 578.2-2018 in English

Interpretation of the core content of the standard

This standard systematically establishes a complete reference intake system for major elements (calcium, phosphorus, potassium, sodium, magnesium, and chlorine) in my country for the first time, using the four-level indicator system of DRIs:

Intake standards of key elements

Key data of calcium

The AI value for infancy (0-0.5 years) is 200mg/d, the RNI for adolescence (11-14 years) reaches 1200mg/d, and pregnant women in the middle and late stages need to maintain 1000mg/d. The UL value is uniformly set at 2000mg/day, suggesting that calcium supplementation should be cautious of the risk of kidney stones.

Sodium-Potassium Balance Requirements

The adult sodium AI is 1500mg/day (≈3.75g of table salt), and the potassium AI is 2000mg/day. The sodium-potassium ratio should be controlled above 1:1.3, which provides guidance for the prevention and treatment of hypertension.

Adjustment Recommendations for Special Populations

Key points for implementing the standard

1. Medical institutions should give priority to using RNI values for nutritional assessment
2. Food nutrition labels are recommended to indicate both NRV% and UL%
3. Community education should emphasize the importance of sodium and potassium synergistic supplementation
4. Clinical nutritional support should refer to the pregnancy stage classification standards