Vitamin B2 (Riboflavin) recommended daily intake
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Recommended Daily Intake of Vitamin B2 (Riboflavin): Global Guidelines
The recommended daily intake (RDA) for riboflavin is generally set at 1.2 mg per day for adults, as identified in both Korean and international guidelines. This value is based on the amount needed to meet the nutritional requirements of most healthy individuals and is supported by several national and international nutrition societies 15.
Health Benefits of Meeting Riboflavin RDA
Reduced Disease Risk
Consuming riboflavin at levels between 1.2 mg and 2.4 mg per day is associated with a lower risk of certain diseases, such as cervical cancer, in the Korean population. Intakes above 2.4 mg per day did not show additional benefits for this outcome .
Cognitive Function in Older Adults
For older adults, riboflavin intake at or above the RDA is linked to better cognitive performance. Higher intake is associated with a reduced risk of low cognitive scores, suggesting that meeting or exceeding the RDA may help protect cognitive function in aging populations .
Migraine and Other Health Outcomes
Most adults in the United States meet the RDA for riboflavin through their diet. While dietary riboflavin intake is associated with the odds of migraine in women, the RDA itself is not a direct predictor of migraine risk. However, ensuring adequate intake remains important for overall health .
Riboflavin Intake in Special Populations
Elderly Individuals
A significant portion of elderly individuals may have riboflavin intakes below recommended levels, which can be detected through biochemical markers. Those with lower intakes often consume fewer dairy products, a key source of riboflavin. Increasing dairy intake is advised for elderly people who consume less than two servings per day to help meet the RDA .
Adolescents and Global Deficiency
Riboflavin deficiency is common in some populations, such as Chinese adolescents, where a large majority do not meet the estimated average requirement. This highlights the importance of regular riboflavin intake, as the body cannot store this vitamin .
No Added Benefit from Excess Intake
Supplemental riboflavin beyond the recommended amounts does not provide additional health benefits and is not recommended for the general population .
Conclusion
The recommended daily intake for riboflavin (vitamin B2) is 1.2 mg for adults, with slightly higher needs for certain groups such as pregnant or lactating women. Meeting this intake supports general health, reduces the risk of some diseases, and helps maintain cognitive function, especially in older adults. Most people can achieve adequate riboflavin intake through a balanced diet, particularly by including dairy products and other riboflavin-rich foods. Excessive supplementation is unnecessary for most individuals.
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