Functional Testing –
GI-MAP, DUTCH &
Organic Acids

Find the real cause behind your gut, hormone & energy issues
  • GI-MAP® stool test: microbiome, parasites, Candida, H. pylori & digestion
  • DUTCH hormone panel: cortisol rhythm, DHEA, melatonin & hormone detox
  • Organic Acids (OAT): energy production, detox pathways & nutrients
  • Live Blood Microscopy (Spain): immune function, microbial load & vitality
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Personalized, evidence-informed interpretation by Siff Frost with a custom protocol based on your results.
Siff Frost – Functional Testing Specialist
Your conventional blood tests integrated with functional findings — clean flat lay
Lab Integration

Integrating Your Medical Lab Work

Bring your recent blood tests — get the whole picture.

I’ll review your doctor’s labs alongside functional testing to reveal patterns that standard ranges often miss. You’ll leave with a clear explanation and a practical plan.

  • Understand your markers in plain language.
  • Connect gut, hormones & energy through trends across tests.
  • Personalized protocol with diet, lifestyle and targeted supplements.
  • Optional coordination with your physician when helpful.
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Siff Frost portrait

Functional Tests I Offer

Evidence-informed functional testing by Siff Frost — helping you find the root cause of bloating, IBS, fatigue, skin issues and hormone shifts. Available in Spain (in-person) and online worldwide.

Core Lab Panels

  • GI-MAP™ Gut Test — DNA stool analysis for microbiome imbalances, parasites, Candida, H. pylori, digestion & inflammation.
  • DUTCH Hormone Test — cortisol patterns, DHEA, melatonin & hormone detox (peri/menopause, sleep, anxiety, low libido).
  • Organic Acids (OAT) — insights into energy production, detox pathways, nutrients & neurotransmitters.
  • Dark Field Microscopy (Spain) — live blood analysis for immune function, microbial load & vitality.
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Want to Know How It Works?

Curious about the step-by-step process behind my functional testing and personalized protocols? On this page I explain exactly how it works – from choosing your test, to reviewing results, and creating a custom plan for you.

Discover How It Works

During a free call, we’ll discuss your symptoms, history and goals to decide which testing — if any — is relevant for you. You’re always welcome to ask questions.

If you’d like ongoing support or to hear how others work with testing and healing, you can also join the free Rebuild Your Health community.

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Join the Community