Another scenario in which your hormone level could be too low for detection is using diluted urine for the test
Biochem J 430:439451 Lewerenz J, Ates G, Methner A, Conrad M, Maher P (2018) Oxytosis/ferroptosis-(Re-) emerging roles for oxidative stress-dependent non-apoptotic cell death in diseases of the central nervous system
The rubber stopper is exposed to the open air, and failing to sanitize it is the most common way to introduce bacteria into your sterile solution.
doi: 10.1042/BJ20100409 65 DiotalleviM.ChecconiP.PalamaraA
For research use, the more controlled setup is a dedicated refrigerator with a thermometer or data logger, a stable shelf location, and a box that protects the vial from light
Individuals who are overweight or living with obesity, especially those with complications like type 2 diabetes or hypertension, may find our tailored approach beneficial