^^^
Yes TP82007, that's correct. Most lab tests use specific gravity, creatinine clearance, and pH to check for validity. The first 2 are for dilution and pH for adulterants or old urine that might have been substituted. It can be clear as bottled water and still pass these tests. Color is only important as long as it isn't black or purple or red, etc. If you are getting an instant test from a PO and diluting, it is wise in this case to add the vitamin B-2 to your process.