Testing for 5a-Reductase Activity

Hello,

I’m looking for a test that can measure 5a-Reductase Activity.
From what I have read serum DHT levels may not be an accurate measurement.

I found one test that I think can be used to measure it but I’m not certain.

Could a test that measures these be use to determine 5a-Reductase Activity?

Urinary Hormone Profile (24 hour)

Androgens
DHEA
Testosterone
Androsterone
Etiocholanolone
5a-Androstanediol
5ß-Androstanediol
Glucocorticoids—evaluates stress hormones and hormones related to sugar metabolism
Pregnanetriol
Cortisone
Cortisol
Tetrahydrocortisone
Allo-tetrahydrocortisol
Tetrahydrocortisol
11ß-Hyroxyandrosterone
11ß-Hyroxyetiocholanolone
Mineralocorticoids — evaluates hormones related to fluid balance and blood pressure control
Allo-Tetrahydrocorticosterone
Tetrahydrocortosterone
11-Dehydrotetrahydrocorticosterone

Thanks