Capillary testing has real limitations for hormone-dependent protocols. The sample quality issues with fingerprick for certain analytes - particularly testosterone and some lipid fractions - mean results can be unreliable enough to make decisions on. For monitoring in that context, venipuncture panels give the full picture that fingerprick methods miss. The cost difference between the two has narrowed with some of the concierge lab services, which makes the tradeoff less compelling than it used to be.