Guide
Magnesium glycinate with vitamin D3 and K2
Magnesium is needed as a cofactor to activate vitamin D in the body, which is why the two are often paired. Here's what's documented and what our product does and doesn't include.
Yes, you can take magnesium glycinate with vitamin D3 and K2 — there's no documented problem combining them, and there's a genuine biochemical reason they're often sold together: magnesium acts as a cofactor for the enzymes that activate vitamin D in the body.
How magnesium and vitamin D actually connect
A 2018 review in the Journal of the American Osteopathic Association lays out the mechanism: every enzyme that metabolises vitamin D — converting it from the form made in skin or eaten in food into its active form — requires magnesium as a cofactor. The review notes that deficiency in either nutrient is associated separately with various disorders, and concludes it's important to get an adequate amount of magnesium to obtain the full benefit of vitamin D.
That's a statement about magnesium's role in a metabolic pathway, not a claim that taking extra magnesium raises your vitamin D level, or that taking vitamin D does anything special to your magnesium level. If your magnesium intake is genuinely low, it's one more reason among several to close that gap; it isn't evidence that a magnesium supplement improves vitamin D status in someone who already has adequate magnesium.
Where K2 fits in
Vitamin K2 doesn't have the same documented mechanistic link to magnesium. It's most often paired with D3 in supplements because both vitamins are involved in how the body handles calcium — D3 in absorbing it, K2 in directing it — which is a separate pairing from the magnesium-vitamin D relationship described above. We don't sell a vitamin D3/K2 product, so we don't make claims about that pairing here beyond the general nutrient-function claims each vitamin carries on its own label.
What each nutrient is separately established for
| Nutrient | Established claims |
|---|---|
| Magnesium | Normal muscle function; normal energy-yielding metabolism and reduced tiredness; normal nervous system and psychological function; electrolyte balance. |
| Vitamin D | Normal absorption and utilisation of calcium and phosphorus; normal blood calcium levels; maintenance of normal bones and teeth; normal function of the immune system. |
| Vitamin K | Normal blood clotting; maintenance of normal bones. |
Why the combination is common on labels
Multi-nutrient bone or immune formulas frequently list magnesium, D3 and K2 together because each is independently linked to bone and mineral metabolism, not because a trial has tested the three-way combination against any of them alone. Magnesium's link to vitamin D is a cofactor relationship inside cells; it isn't the same kind of evidence as a randomised trial showing a combined product outperforms a single nutrient. Reading a label that lists all three is reading three separate nutrient stories, each with its own dose and its own authorised claims.
Our product
Electric Tiger Magnesium Glycinate is magnesium only — 275 mg of elemental magnesium from 2,500 mg of magnesium glycinate per three-capsule serving, no added vitamin D or K2. If you're taking a separate D3/K2 supplement alongside it, that's two products working on related but distinct pathways, not one formula.
Questions people ask
Can I take magnesium glycinate and vitamin D3 together?
Yes. There's no documented problem, and magnesium is needed as a cofactor for the enzymes that activate vitamin D in the body, so adequate magnesium supports normal vitamin D metabolism.
Can you take vitamin D3, K2 and magnesium glycinate together?
Yes, all three are commonly taken together with no documented interaction problem. Each has its own separately established nutrient-function claims; taking them together doesn't create a new, combined effect that's been studied as such.
Does magnesium help vitamin D absorption?
More precisely, magnesium is a cofactor for the enzymes in the liver and kidneys that convert vitamin D into its active form. That's a role in vitamin D's metabolism, described in a 2018 mechanistic review, rather than a documented effect on how much vitamin D is absorbed from a meal or a supplement.
Should I take magnesium and vitamin D at the same time of day?
There's no evidence that timing changes how either nutrient is used at ordinary doses. Vitamin D is fat-soluble and is generally taken with a meal containing some fat; magnesium glycinate doesn't have that requirement.
Does taking vitamin D3 and K2 change how much magnesium I need?
No trial has established a different magnesium requirement for people taking D3 and K2 supplements. The Recommended Dietary Allowance for magnesium — 400–420 mg/day for adult men, 310–320 mg/day for adult women — is set independently of vitamin D or K intake.
Related reading
- Magnesium glycinate benefits: what's established and what isn't
- Magnesium glycinate and zinc
- Magnesium glycinate with calcium, potassium and electrolytes
- How much magnesium glycinate should you take a day?
Sources
- Uwitonze AM, Razzaque MS. "Role of Magnesium in Vitamin D Activation and Function." J Am Osteopath Assoc 2018;118(3):181-189. PMID 29480918.
- Commission Regulation (EU) No 432/2012, vitamin D, vitamin K and magnesium entries.
- Institute of Medicine. Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride. National Academies Press, 1997 (NCBI Bookshelf NBK109816).
- Electric Tiger Magnesium Glycinate Supplement Facts: product page.
Sources
- Role of Magnesium in Vitamin D Activation and Function Magnesium is a required cofactor for the enzymes that activate vitamin D in the body.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
