McCall McPherson explains how free T3 below 3.6 pg/mL causes fatigue, brain fog, and weight gain by disrupting energy production and metabolism. Low free T3 affects blood sugar regulation, cholesterol transport, and mitochondrial function, often leaving people puffy and inflamed. Optimal levels matter more than just staying in the normal lab range.
Chapters
If your free T3 is below 3.6, you're probably gonna feel exhausted, fatigued, and you're going to notice it's a little easy to gain weight. So free T3, your T3 hormone, is one of the most powerful influencers in our energy production, from our hormones to our mitochondria, everything. Like, it impacts everything. And so our entire physiology gets depleted if you don't have enough. So that manifests as fatigue and brain fog. Really early on in the process, even if it's slightly low. Second, it influences our metabolism, okay? It is the foundation, the cornerstone of our metabolic function, of our ability to deal with blood sugar, to excrete cholesterol and transport it appropriately. And that manifests for us as gaining weight, right? Our metabolism slows, we go into this hibernation mode. If we deviate from our dietary normal plan even a little, Immediately we're 2 to 5 pounds heavier. So that can be from stored fat increases. It can also be from inflammation, water weight, poor lymphatic flow, which is pervasive in the thyroid community. We're puffy, right? We're puffy people. So our T3 even impacts your lymphatic system. So those things can come on really, really early. It is imperative that your T3 is perfect, optimal, not normal.