Functional Lab Testing to Uncover the Root of Thyroid, Hormone & Gut Issues
Welcome to Your Lab Tests Hub
Here’s where you’ll find my most trusted lab tests, plus guidance to choose what’s right for your thyroid, hormones, gut, and beyond.
Get Answers Faster
Whether you're experiencing constant fatigue, weight loss resistance, brain fog, or autoimmunity, functional testing helps pinpoint the “why” so we can address the root cause - not just the symptoms.
Below, you’ll find a curated list of tests I recommend for my clients. Each test includes a short summary, what it’s best for, and a button to order directly.
If you're unsure which test is right for you, please reach out to us at support@tokibirch.com
Need help understanding your results? Choose the "Expert Review" option at checkout to receive an interpretation-only video.
Best for: Underactive thyroid, Hashimoto’s, constant low energy, fat gain, constipation, mood swings
Summary: A full-spectrum lab panel assessing advanced thyroid markers, so we can see the full picture and stop relying on “normal” labs that miss the mark.
Basic Panel -
- Free Thyroxine (FT4)
- Free Triiodothyronine (FT3)
- Thyroglobulin Antibodies (TgAb)
- Thyroid peroxidase antibodies (TPO)
- Thyroid-stimulating hormone
Comprehensive Panel -
- Free Thyroxine (FT4)
- Free Triiodothyronine (FT3)
- Reverse Triiodothyronine (rT3)
- Thyroglobulin Antibodies (TgAb)
- Thyroid peroxidase antibodies (TPO)
- Thyroid-stimulating hormone (TSH)
- Total T4 (Thyroxine)
- Triiodothyronine (T3)
- Triiodothyronine (T3) Uptake
- TSH Receptor Antibody (TRAb)
Best for: Chronic fatigue, burnout, thyroid slow-down, mystery hair loss
Summary: A powerful, non-invasive test that maps your mineral status and toxic metal exposure. Essential for understanding thyroid function, stress load, and metabolic sluggishness.
Best for: Cortisol imbalances, oestrogen dominance, sleep issues, midlife hormone shifts
Summary: This gold-standard dried urine test shows exactly how your body is producing and clearing hormones like cortisol, oestrogen, progesterone, and testosterone — revealing your true stress-hormone imbalance(s).
Best for: Bloating, IBS, stubborn weight, constipation/diarrhoea, food sensitivities
Summary: This DNA-based stool test uncovers hidden infections, parasites, yeast, inflammation, and leaky gut — giving us a gut-healing roadmap to support thyroid and immune health.
Best for: Mould exposure (e.g., damp homes), histamine flares, unexplained illness
Summary: Tests for 16 mycotoxins that can silently sabotage your thyroid, immune system, and mitochondria, especially in sensitive or chronically ill women.
Best for: Mitochondrial dysfunction, chronic fatigue, mood swings, cravings, gut issues
Summary: This urine test provides a full-body snapshot of energy production, neurotransmitters, gut pathogens, detox pathways, and nutrient need — ideal when nothing else explains how you feel.
Best for: Full-body deep dive, complex cases, “I want everything checked”
Summary: Includes over 50 markers for thyroid, iron, glucose balance, cholesterol, inflammation, liver, kidneys, and more. Ideal for those ready for advanced insights.
Cyrex Array Testing: Find Out If You Have Food Sensitivities, & Autoimmunity
Best for: Autoimmune exploration, gluten reactivity, leaky gut, cross-reactivity
Summary: Cutting-edge blood tests that detect hidden autoimmune activity, gut permeability, and immune responses to gluten, dairy, and other food proteins — ideal for autoimmune conditions like Hashimoto’s, and chronic inflammation.
FAQS
The Comprehensive Thyroid Panel is your best option. It includes Free T3, Free T4, Reverse T3, and both types of thyroid antibodies — helping us uncover the root cause of fatigue, weight gain, and brain fog.
No referral needed. These private functional tests are available directly and are ideal for women 40+ who want answers for why they have the symptoms they experience.
Most of them, yes. Some tests use urine, stool, saliva, or hair samples that can be collected at home. If a blood draw is required, you’ll receive instructions to use a local phlebotomy service.
Yes. Simply choose the Expert Review option at checkout to receive a personalised video walkthrough and summary — without booking a full consultation.
We’re happy to guide you. Email us at support@tokibirch.com, or start with the Thyroid Panel and/or HTMA, which is the most popular choice for women with fatigue, hormone shifts, or weight gain.
Need help understanding your results? Choose the “Expert Review” option at checkout to receive a video interpretation and written summary.
Disclaimer: These tests are designed to uncover potential areas of imbalance. They are not used to diagnose or treat medical conditions. Video interpretations (if added) are educational and not personalised advice unless you are enrolled in a private or group program.
Toki Birch is a certified functional medicine practitioner helping women over 40 reverse underactive thyroid and bring about remission from Hashimoto’s naturally.
FOR SUPPORT ISSUES OR QUESTIONS, PLEASE EMAIL US AT SUPPORT@TOKIBIRCH.COM