By Fiona Chin N.D. 
The thyroid and kidney connection: how an under active thyroid affects kidney health
An underactive thyroid can have a profound effect on kidney function, yet this link is often missed. Many people understand the basics of hypothyroidism and hyperthyroidism, but don’t realise how thyroid imbalance influences metabolism, blood flow, and chronic kidney disease risk. Understanding the connection between the thyroid and kidneys is key to supporting both hormonal and renal health.
In this video, our guest Lindsey Zirker explores how thyroid disorders influence kidney health and overall metabolic function. She explains how under active thyroid and related hormonal shifts affect kidney filtration, inflammation, and energy balance. Lindsey also discusses what thyroid lab tests reveal about kidney stress, the difference between hypothyroidism and hyperthyroidism in kidney function, and practical steps to support thyroid balance to improve kidney outcomes.
You’ll also learn about the hidden thyroid and kidney link, how hormone receptors and environmental toxins contribute to dysfunction, and why accurate hormone testing is essential for managing thyroid and kidney disease together. Discover how restoring thyroid health can help protect kidney function, boost energy, and promote long-term well-being.
00:00 Intro
00:16 Lindsey Zirker Introduction
02:01 Thyroid Function & Its Link with Kidney Disease
06:57 Symptoms of Hypothyroidism & Hyperthyroidism
15:11 Understanding Thyroid Lab Tests & Hormone Insights
25:23 Thyroid Function & Its Impact on Kidney Health
30:13 The Hidden Thyroid–Kidney Connection
34:51 Optimizing Thyroid Treatment for Better Kidney Outcomes
43:15 Understanding Thyroid Receptors, Toxins & Kidney Health
51:55 Challenges of Hormone Testing & Balance
56:56 Outro
