Blood test. Notice that dr. Dasilva talks about "optimal" blood levels. This is different than "normal range". It is very important to optimize hormone levels to get the most out of bhrt. All lab test results follow a bell curve, so if your levels are on the lower end of the curve, that places you in lowest end of the population being studied. Normal range means nothing in my opinion.
Bioidenticals. First find a doctor like myself who specializes in bio identical hormones. Hormone levels should be measured in the blood and the doc should know what optimal levels are. Lastly, bio identical hormones should be given to balance each hormone to those optimal levels. Make sure the thyroid is included in the panel of blood work. Non bio identicals do not resemble human hormones- side effects.