Dr. Mychael Seubert, NDMychael Seubert, ND
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Dr. Mychael Seubert, ND

Naturopathic doctor serving Long Island — offices in Riverhead and Huntington, Garden City by telehealth — and patients nationwide via secure telehealth. ILADS-trained. GastroANP-affiliated.

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Long Island Locations
  • Riverhead, NY
    Naturopathic Wellness Center of Long Island
    548 Roanoke Ave, Riverhead, NY 11901
    (631) 722-2246 · Mon–Fri 9:00 AM – 6:00 PM
  • Huntington, NY
  • Garden City, NY - Virtual
  • Telehealth — Nationwide
The information provided on this website is for educational purposes only and is not a substitute for individualized medical advice. Dr. Mychael Seubert, ND is licensed as a naturopathic physician in Arizona and Connecticut. New York State does not currently license naturopathic doctors. © 2026 Dr. Mychael Seubert, ND. All rights reserved.
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Condition

Hashimoto's & Thyroid Dysfunction

Most thyroid workups stop at TSH. Dr. Seubert reviews and interprets your complete thyroid panel — free T3, free T4, reverse T3, TPO and Tg antibodies — using functional ranges. Patients with "normal" TSH but classic symptoms (fatigue, weight gain, hair loss, cold intolerance) frequently get their first complete picture here.

Clinical Approach
  • ◆Full thyroid panel reviewed with functional-range interpretation
  • ◆Hashimoto's antibody management and root-cause immune work
  • ◆Nutrient repletion (selenium, iron, zinc, vitamin D)
  • ◆Coordination with prescribing physicians when medication is needed
Common Signs & Symptoms
  • ◆Persistent fatigue
  • ◆Hair thinning
  • ◆Cold hands and feet
  • ◆Stubborn weight gain
  • ◆Mood and cognitive changes
Questions

About Hashimoto's & Thyroid Dysfunction

My TSH is normal but I feel hypothyroid — what now?+

TSH alone misses a large percentage of thyroid issues, particularly conversion problems (T4 → T3) and early autoimmune Hashimoto's. A full panel with antibodies usually reveals the picture.

Ready to get to the root of it?

Book a consultation with Dr. Seubert — Long Island offices or nationwide telehealth.

Book Me(631) 722-2246
Related Reading

Articles on Hashimoto's & Thyroid Dysfunction

How to Improve Thyroid Conversion Naturally

Learn how to improve thyroid conversion by examining nutrition, digestion, stress, and inflammation that can influence your daily hormone balance.

Best Supplements for Hashimoto Support, Explained

Explore the best supplements for Hashimoto support, including when selenium, vitamin D, iron, and magnesium may fit within a personalized wellness plan today.

Hashimoto's vs Hypothyroidism Symptoms Explained

Hashimoto's vs hypothyroidism symptoms can overlap. Learn the patterns, labs, and whole-person factors worth discussing when you still feel unwell daily.

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