NL Clinic Blog

13 May 2025

Though often called a vitamin, Vitamin D actually acts more like a hormone in the body. It plays a crucial role in everything from bone health and immune function to mood regulation, hormone balance, and even cancer prevention

12 May 2025

Reverse T3 (rT3) is an inactive form of the thyroid hormone T3. It’s created when your body converts T4 (thyroxine) into rT3 instead of Free T3, essentially putting the brakes on your metabolism

11 May 2025

Free T3 (Triiodothyronine) is the most biologically active form of thyroid hormone — it’s the hormone that directly enters cells and regulates metabolism, temperature, heart rate, digestion, and brain function. While the thyroid mostly produces T4 (thyroxine), that hormone must be converted into T3** for the body to actually use it.

10 May 2025

Thyroid-Stimulating Hormone (TSH) is one of the most critical hormones for metabolic health. Produced by the pituitary gland in the brain, TSH tells the thyroid gland (located in the neck) to produce and release two key hormones: T3 (triiodothyronine) and T4 (thyroxine)