The 5 panel saliva test kit measures 5 critical, "unbound" or "available" hormones, including: estrogen, progesterone, testosterone, DHEA, and cortisol.
Blood serum testing measures all hormones, both "bound" & "unbound." Unbound hormones typically make up less than 3% of the total hormone count. Saliva testing is the most accurate way to test for these hormones.