Online Functional Medicine Doctors

Quiz – Find Your Doctor

Sign In

The Best Labs to Check for Hormones and What They Mean

Hormones are your body’s chemical messengers—tiny but powerful signals that tell your cells what to do. When they’re balanced, you have steady energy, a stable mood, good sleep, and overall well-being. When they’re out of balance, you might notice fatigue, mood swings, weight changes, hot flashes, irregular cycles, or brain fog.

At Vytal Health, we take a whole-person approach to hormone testing. We don’t just run one or two labs—we create a full picture using both traditional blood work and advanced functional testing. We also know that a hormone imbalance is rarely the root cause—it’s more like one layer of the onion. When we find an imbalance, it’s a clue that helps us keep peeling back layers until we discover why it’s there in the first place.

Here’s what we typically check, what each result means, and why the timing of your test can be just as important as the test itself.

Key Hormones We Check with Blood Work

If you’re still having periods, hormone testing is usually done on specific days of your cycle. If you’re in menopause, you can test anytime. And if your cycles are irregular or you’re on hormonal birth control, your doctor can help decide the best timing for you.

1. Sex Hormones

These influence reproductive health, mood, metabolism, and bone strength.

  • Estradiol (E2) –
    • Tested on cycle day 2–3 to check baseline levels and ovarian function.
    • Tested again on cycle day 21 (or about 7 days after ovulation) to see luteal-phase levels and balance with progesterone.
  • Progesterone –
    • Tested on cycle day 21 to confirm ovulation and assess luteal phase health.
  • Testosterone (Total & Free) – Important for muscle mass, libido, energy, and mood. Tested any day in the cycle.
  • DHEA-S – Produced by your adrenal glands, it’s a precursor for estrogen and testosterone and gives us clues about adrenal health. This can be tested any day of the cycle as well.

2. Pituitary Hormones

These act as “command signals” for your ovaries and other endocrine glands.

  • FSH (Follicle Stimulating Hormone) – Checked on cycle day 2–3 to assess ovarian reserve and reproductive health.
  • LH (Luteinizing Hormone) – Also checked on cycle day 2–3, giving additional information about reproductive hormone patterns.

3. Thyroid Hormones

Your thyroid plays a central role in metabolism, mood, menstrual regularity, and energy.

  • TSH (Thyroid Stimulating Hormone) – A starting point for thyroid evaluation, this hormone, which happens to also come from the pituitary, signals the thyroid to produce its hormones.
  • Free T4 & Free T3 – These are the thyroid hormones produced by the stimulation of TSH that directly affect metabolism and cellular energy.
  • Reverse T3 – Helps assess whether the body is converting thyroid hormone effectively.
  • Thyroid Antibodies (TPO, TgAb) – Identify autoimmune thyroid issues like Hashimoto’s or Grave’s Disease.

4. Other Key Hormone-Like Labs

While not technically reproductive hormones, certain vitamins and signaling molecules behave like hormones and are critical for optimal function:

  • Vitamin D – Acts more like a hormone than a vitamin. It supports immune health, bone strength, mood balance, and hormone regulation. Low levels can contribute to fatigue, mood changes, and immune dysfunction. Low levels are also linked to the development of uterine fibroids!
  • Insulin & Fasting Glucose – Give us insight into blood sugar balance and metabolic health, which directly impacts sex hormone balance.
  • SHBG (Sex Hormone-Binding Globulin) – A protein that affects how much active testosterone and estrogen are available in your body.

Functional Hormone Testing: DUTCH Test, Salivary Cortisol, and Menstrual Mapping

While blood work gives a valuable snapshot, it doesn’t always capture how your hormones fluctuate or how your body processes them. That’s where functional testing comes in.

DUTCH Test (Dried Urine Test for Comprehensive Hormones)

  • Measures estrogen, progesterone, testosterone, and their metabolites
  • Evaluates adrenal hormones (cortisol and cortisone) throughout the day
  • Shows hormone metabolism and detox pathways—important for understanding potential breast, prostate, and endometrial health risks
  • Identifies patterns like estrogen dominance or cortisol (stress hormone) irregularities that may be causing symptoms

ZRT Salivary Cortisol Testing

  • Collects four samples throughout the day (morning, midday, afternoon, and evening) to show your diurnal cortisol curve
  • Reveals whether your stress response is optimal, overactive, or sluggish—information we can’t get from a single blood draw
  • Note: Hormones like estrogen, progesterone, and testosterone can also be tested simultaneously in the saliva

Why Cycle Timing Matters

If you’re menstruating, certain hormones must be tested at specific points in your cycle for the results to be meaningful:

Hormone Best Day(s) to Test Why It Matters
Estradiol Day 2–3 & Day 21 Baseline ovarian function + luteal phase balance
Progesterone Day 21 Confirms ovulation & luteal phase health
FSH & LH Day 2–3 Ovarian reserve & reproductive hormone patterns
Testosterone, DHEA-S, Thyroid Hormones, Vitamin D Any day Not cycle-dependent
Cortisol (Saliva) 4 times in one day Measures daily rhythm & stress response

If your cycle is irregular, we help determine the right timing based on symptoms and tracking tools.

How We Support Hormone Balance

Testing is just the first step. Once we understand your hormone picture—and the why behind any imbalances—we create a personalized plan that may include:

  • Bioidentical Hormone Replacement Therapy (BHRT) – For those who need targeted support to restore healthy levels
  • Supplements – To support production, metabolism, and detoxification of hormones
  • Lifestyle Changes – Including stress management, sleep optimization, nutrition, and movement strategies
  • Root Cause Investigation – Because hormones are rarely the first domino to fall—we keep digging until we uncover the deeper cause, whether it’s nutrient deficiencies, inflammation, gut health issues, or chronic stress

Next step: If you’ve been wondering whether hormone testing could help you get answers, we’d love to help you find out.
 📅 Schedule a free 15-minute call with a Vytal Health care coordinator to learn more about our approach, testing options, and next steps for your unique situation.