reference range

D
Unexpected results

I have two sets of results, which I will post shortly. The E2 is using the same assay, but the total and free are not. Before I present the results, I would like to understand the following: For my free testosterone, both results are using pg/mL. I know that the results won't be the same, and I...
- Deleted member 42882
- Thread
- May 21, 2023
- reference range
- Replies: 3
- Forum: Blood Test Discussion
E
Quest Free T Reference Ranges

Hello, I had blood work done in May and the reference range for Free T was- 35.0-155.0 pg/mL Just had them done again in October and they changed to - 46.0-224.0 pg/mL Anyone know why they changed this seems like a big jump?
- econnolly
- Thread
- Dec 8, 2019
- free tesosterone quest reference range
- Replies: 6
- Forum: Testosterone Basics & Questions
What blood tests have reference ranges that depend on age?

We know some reference ranges on blood test are adjusted for age, but I don’t know which ones are and which aren’t. This is important because it tells us if we are over or under range, creates flags on blood tests, may concern patients or doctors. Recently Dr. X contributed the fact that...
- DragonBits
- Thread
- Nov 4, 2018
- age adjusted dhea free t igf-1 reference range
- Replies: 1
- Forum: Blood Test Discussion

TRT Hormone Predictor Widget

Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038