Practitioner-Grade Supplement · Pure Encapsulations
The mineral most thyroid protocols quietly skip.
Magnesium is a required cofactor for converting T4 into usable T3 — and it's one of the first minerals hypothyroid and Hashimoto's patients run low on. This is the exact glycinate form I dispense in my own practice: highly absorbable, gentle on digestion, and free of the fillers found in drugstore magnesium.
90 capsules · 1–3 month supply·120 mg elemental magnesium·Third-party tested
Why Glycinate — At A Glance
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Same formula, liquid dose
Magnesium Glycinate Liquid
Same glycinate form in a flavorless liquid — easy to titrate, and a good option for patients who are sensitive to capsules or want a lower starting dose.
$48.99 · 480 mL
The Difference Is In The Form
Not all magnesium behaves the same in your body
The label says "magnesium" either way — the chelate attached to it decides how much you actually absorb, and whether it sends you to the bathroom.
Oxide / cheap citrate blends
- ✕Poorly absorbed — oxide is roughly 4% bioavailable
- ✕Common cause of loose stools and cramping
- ✕Often bulked with fillers, dyes, or magnesium stearate
- ✕Rarely third-party tested for potency
Fully reacted bisglycinate chelate
- ✓Bound to glycine for high absorption at the cellular level
- ✓Gentle on the gut — no laxative effect at typical doses
- ✓Hypoallergenic: no gluten, dairy, soy, or artificial anything
- ✓NSF-audited manufacturing, dispensed through your practitioner account
A Quick Pattern Check
Which of these sound familiar?
Tap anything you've been dealing with. This isn't a diagnosis — it's the same pattern I look for in patients who turn out to be low in magnesium.
These are common signs of a magnesium gap — especially in hypothyroid and Hashimoto's patients, whose bodies use magnesium faster than average.
Why It Earns A Spot In Your Protocol
One mineral, four jobs
What Patients Often Notice
Common patterns once a real magnesium gap gets addressed
Every patient's timeline is different, but these are the shifts that come up again and again in hypothyroid and Hashimoto's patients once the right form and dose is in place.
Fewer nighttime leg cramps and more restful sleep — often within the first couple of weeks. One of the most common shifts we see in Hashimoto's patients.
Less of that "wired but tired" feeling. Magnesium is a cofactor for the calming neurotransmitters that chronic stress and low thyroid function burn through fastest.
Tension headaches easing up, along with fewer 3am wake-ups — two of the complaints we hear most from hypothyroid patients running low on magnesium.
More even energy through the afternoon, and softer PMS symptoms for patients who still cycle — magnesium supports both blood sugar and hormone regulation.
From The Practice
Two patients, two different starting points
One Hashimoto's patient came in after years of restless legs and disrupted sleep. Her genetic panel showed a variant that made it harder for her body to hold onto magnesium in the first place — which explained why nothing she'd tried before had worked. Six weeks after switching to this exact form, her restless legs were gone and she was sleeping through the night.
Hashimoto's patient · 6 months in
For one hypothyroid patient, the turning point wasn't just starting a supplement — it was testing her magnesium levels first, with an in-office test kit, so we could see in black and white when she was low and when she'd repleted. That data made it possible to know exactly what to adjust next for her thyroid and overall health, instead of guessing and hoping a pill was doing something.
Hypothyroidism patient · 5 months in
Why I Dispense This Specific Brand
Because "take a magnesium" isn't specific enough to actually work
I see it constantly: a patient's labs come back "normal," they're still exhausted, and somewhere along the way someone told them to try magnesium — so they grab whatever's cheapest at the drugstore. Wrong form, wrong dose, and it either does nothing or gives them the runs.
Pure Encapsulations is one of the few brands I trust enough to put my name next to: third-party tested, free of the fillers that cause most of the GI complaints, and the glycinate form specifically supports the calming, muscle-relaxing, and thyroid-conversion pathways my patients actually need.
Dispensing it through Fullscript means you're getting the exact product I recommend — not a look-alike from a marketplace — at practitioner pricing.
Before You Order
Frequently asked questions
Pure Encapsulations Magnesium Glycinate · $27.99
Give your thyroid protocol the mineral it's been missing.
Ordered through your own Fullscript dispensary — verified potency, practitioner pricing, and it ships straight to you.
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