- Dietary folate equivalents (DFE) account for the higher bioavailability of synthetic folate compared to natural folate.
- Use the conversion formula: \(\text{DFE} = \text{Synthetic Folate (mcg)} \times 1.7\).
- With the provided synthetic amount of \(280 \text{ mcg}\), perform the multiplication: \(280 \times 1.7 = 476\).
- The correct dietary folate equivalent is \(\boxed{476}\).
Explanation
- Analysis of Dietary Folate Equivalents (DFE)
To determine the dietary folate equivalents (DFE), we need to account for the fact that synthetic folate (folic acid) is more bioavailable than folate found naturally in foods. Specifically, synthetic folate is absorbed at 1.7 times the rate of natural folate. The conversion formula for synthetic folate is:
\[\text{DFE (mcg)} = \text{Amount of synthetic folate (mcg)} \times 1.7.\]
In this problem, we are looking for the DFE value based on a given amount of synthetic folate, which is identified in the reference material as 280 mcg.
- Calculating the DFE Value
We use the conversion formula \(\text{DFE} = 280 \text{ mcg} \times 1.7\). Performing this calculation:
\[280 \times 1.7 = 476.\]
Thus, 280 mcg of synthetic folate provides 476 mcg DFE.
- Conclusion
Comparing our result to the given options:
Our calculated result of 476 corresponds to option C. Therefore, the dietary folate equivalent is \(\boxed{476}\) mcg DFE.
Examples
Understanding dietary folate equivalents is essential for nutritional science, especially when reading food labels. For instance, if a breakfast cereal label states that it contains 280 mcg of folic acid per serving, you can calculate its contribution to your daily nutritional intake by converting it to DFE using the factor of 1.7: \(280 \text{ mcg} \times 1.7 = 476 \text{ mcg DFE}\). This calculation helps individuals meet their recommended daily requirements accurately, ensuring they account for the higher absorption efficiency of synthetic vitamins compared to natural folate sources.