Why Vitamin D Testing Is Controversial

Today's episode is a rerun of one of the most important conversations I've ever shared on the podcast, all about vitamin D. As the podcast library grows, some truly foundational episodes can get buried, and this is information that's simply too important to lose. This is part one of a two-part series, and if you've never listened (or even if you have), it's well worth revisiting. Is your vitamin D "deficiency" actually a misdiagnosis? In this eye-opening episode, Tara dives into one of the most misunderstood nutrients in functional medicine: vitamin D.

While most practitioners rush to prescribe high doses of vitamin D based on a single lab marker (25(OH)D), Tara challenges the status quo and breaks down why this approach can be both misleading and harmful, especially for women in perimenopause.

She explains the critical difference between 25(OH)D and 1,25(OH)₂D, why elevated active vitamin D (1,25) often goes unnoticed, and how it can actually suppress your vitamin D storage while driving up inflammation, calcium loss, and even contributing to autoimmune conditions and bone loss.

This episode is a must-listen if you've ever felt confused about whether to supplement or if you've been taking vitamin D long-term without fully understanding how it works in your body.

• The difference between storage vs. active vitamin D (and why you must always test both but your practitioner likely hasn't)
• The issues with vitamin D testing that scientists are hotly debating (can you even trust your lab result?)
• What is the optimal reference range for vitamin D? And why ranges are terribly inflated and many are not to be trusted.
• What really drives down vitamin D in the body and how to come at this from a root-cause perspective instead of drowning yourself in vitamin D supplements

If you're thinking about taking D, already taking D, or have been told your vitamin D is "low" (it likely isn't) then this one is for you.

🔍 Formula to convert your 25,OH,D leve from ng/dL to nmol/L: 25(OH)D in nmol/L = 25(OH)D in ng/dL X 25

EQUIP PRIME PROTEIN – Click HERE to grab yours and use my code: TARA20 to get 20% off

Purchase Herbatonin here and use Tara's discount code for 15% off, which is Tara15: https://symphonynaturalhealth.com/TaraHerbatonin

PIQUE TEA – These are some of Tara's favourite teas! They're crystal form, which makes them super unique and easy to transport in your purse, (they come in single use satchels!) and higher in polyphenols. They're made from high quality ingredients with triple toxin screening, (super important when it comes to your tea). Click HERE to visit the shop.

HRT Made Simple™ - Learn how to confidently speak to your doctor about the benefits of hormone replacement therapy so you can set yourself up for symptom-free, unmedicated years to come without feeling confused, dismissed, or leaving the medical office minus your HRT script.

Hair Loss Solutions Made Simple™ – This course will teach you the best natural, highly effective, and safe solutions for your hair loss so you can stop it, reverse it, and regrow healthy hair without turning to medications.

The Perimenopause Solution™ – My signature 6-month comprehensive hormonal health program for women in midlife who want to get solid answers to their hormonal health issues once and for all so they can kick the weight gain, moodiness, gut problems, skin issues, period problems, fatigue, overwhelm, insomnia, hair/eyebrow loss, and other symptoms in order to get back to the woman they once were.

[FREE] The Ultimate Midlife Perimenopause Handbook - Grab my free guide and RECLAIM your confidence, your mood, your waistline and energy without turning to medications or restrictive diets (or spending a fortune on testing you don't need!).