Vitamin D

Form used in ThyroLove

Cholecalciferol (Vitamin D3) – 2000 IU

Why it’s in ThyroLove

Vitamin D is often thought of for bone health, but it’s actually one of the most important immune regulators, especially when it comes to autoimmunity. I like to think of the immune system like a seesaw which is constantly swinging up and down in Hashimoto’s, either overreacting or underperforming. Vitamin D acts like the center of the seesaw, and when it’s strong and steady, it helps stabilize the swings. Imagine the middle part of the seesaw being wide and grounded—that’s what vitamin D does for immune balance. We use cholecalciferol (vitamin D3), the natural form your body makes from sunlight, at a dose of 2000 IU which is enough to support healthy levels without being excessive.

The Science

  • Vitamin D deficiency is very common in people with Hashimoto’s, especially in colder climates, indoor lifestyles, or those using sunscreen regularly.

  • Vitamin D supports immune balance, and supplementation has been shown to reduce thyroid antibodies (TPO and TG), lower TSH, and increase free T4 and free T3. Study: PMC10754614

  • A 2023 review concluded: “Current evidence supports the potential role of vitamin D in the prevention and management of Hashimoto’s thyroiditis.” Study: PMC10385100

  • Many people still don’t get enough from diet and lifestyle alone, and the RDA (600 IU) is often way way too low to correct deficiency, especially in those that live in the northern hemisphere and have autoimmune conditions.

A quick note from me to you

Whenever you take vitamin D, it’s so important that it’s paired with vitamin K2 in the right form. ThyroLove includes vitamin K2 as MK-7, which is the most bioavailable and longest-lasting form in the body. Here’s why that matters: vitamin D increases calcium absorption, which is great for your bones, but without enough K2, that calcium can end up in places it doesn’t belong, like arteries or soft tissue. Vitamin K2 acts like a traffic director, helping guide calcium out of your bloodstream and into your bones and teeth, where it belongs. I chose MK-7 specifically because it stays in your system longer than other forms, providing more consistent support for calcium regulation and overall heart and bone health. When D and K2 work together, it’s a beautiful thing and essential for safe, effective support, especially when you’re taking vitamin D consistently.