Given this reference test, what is the daily recommended value of magnesium for men in the U.S.?
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Given this reference test, what is the daily recommended value of magnesium for men in the U.S.?

### Input:
In the UK, the recommended daily values for magnesium are 300 mg for men and 270 mg for women.[67] In the U.S. the Recommended Dietary Allowances (RDAs) are 400 mg for men ages 19–30 and 420 mg for older; for women 310 mg for ages 19–30 and 320 mg for older.

### Response:

In the UK, the recommended daily values for magnesium are 300 mg for men and 270 mg for women.[67] In the U.S. the Recommended Dietary Allowances (RDAs) are 400 mg for men ages 19–30 and 420 mg for older; for women 310 mg for ages 19–30 and 320 mg for older.
The daily recommended value of magnesium for men in the U.S. is 400 mg.