Is L-Carnatien evident in tests?

does L-Carnatein injectable appear in urine tests?

If so upto how long please?

Thanks.

what does it matter ? it's not illegal.

is that stuff any good. my aunt is a nutrtionist and had some of it. she didn't want. she said it's pretty expenisve.

Im talking about L-Carnatien from the vet. Animal Stuff the injectable type.