Marek Diagnostics Blog

Man reviewing medications before a hormone blood test

How Medications And Supplements Affect Hormone Test Results

Can medications affect hormone test results? Yes. Opioids, biotin, and steroids change your readings. Learn what to disclose before your next blood draw.

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Man preparing for a testosterone blood test at a morning lab draw

Testosterone Test Preparation: What To Do Before Your Draw

Testosterone test preparation covers when to draw, whether to fast, and which supplements to pause. Backed by AUA and Endocrine Society clinical guidelines.

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Woman setting aside coffee before hormone test

Can You Have Coffee Before A Hormone Test? What To Know

Can you have coffee before a hormone test? It depends on the panel. Learn which hormones caffeine affects, when to fast, and how to prepare for your blood draw.

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Man reviewing testosterone lab results at kitchen counter morning light

Can TRT Testing Confirm Low Testosterone? Labs To Know

Can TRT testing confirm low testosterone? Not from a single blood draw. Two fasting morning tests and documented symptoms are required for a diagnosis.

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Man arranging an online testosterone test from home

How To Get Testosterone Tested Without A Doctor Visit

How to get testosterone tested without a doctor visit. DTC labs, telehealth orders, and what the Endocrine Society and AUA recommend for accurate results.

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Man reviewing pre-TRT lab requisition in clinic waiting area

Hormones Checked Before Starting TRT: Pre-TRT Lab Guide

Hormones checked before starting TRT include LH, FSH, prolactin, hematocrit, and PSA. Learn what AUA and ES guidelines require. Order labs at Marek Diagnostics.

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Close-up of blood collection vials

The Easiest Way To Test Testosterone Levels Accurately

The easiest way to test testosterone levels starts with a morning venous blood draw at a certified lab. Learn what to test, how to prepare, and why it matters.

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Man reviewing testosterone test results at kitchen table

At-Home Testosterone Test And How Accurate Are They?

At-home testosterone tests vary by sample type, assay, and draw timing. Learn what clinical data says about accuracy, limits, and when one result isn't enough.

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Man reviewing TRT monitoring blood work results

What TRT Monitoring Blood Work Should Include And Why

TRT monitoring blood work includes testosterone, hematocrit, PSA, and estradiol draws timed to each formulation. See what guidelines require and when to test. 

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