Cal-Mag + Vit D3 — Multi-Form Calcium & Magnesium with Vitamin D3 for Bone Density, Muscle Function & Nervous System Health
Calcium and magnesium are two of the most important minerals in the human body — and their effectiveness depends entirely on how well they are absorbed. Cal-Mag + Vit D3 addresses this directly by delivering both minerals in a blend of multiple complementary forms, each with different absorption characteristics, alongside Vitamin D3 as cholecalciferol — the essential cofactor required for calcium absorption in the intestine.*
Serving size is 4 vegetarian capsules, 30 servings per container (120 capsules).
What's inside and why it matters
Calcium 796mg per serving (as calcium hydroxide, carbonate, citrate, aspartate & rice chelate)
Most calcium supplements use a single form — typically calcium carbonate, because it is inexpensive and provides a high elemental calcium content per capsule. The problem is that calcium carbonate requires adequate stomach acid for absorption and is poorly absorbed by individuals with low stomach acid, a common issue particularly in older adults.
Cal-Mag + Vit D3 uses five different calcium forms together, each contributing differently to overall bioavailability. Calcium citrate and calcium aspartate are organic acid-bound forms that are well absorbed regardless of stomach acid levels — making them suitable for a broader range of individuals including those with compromised digestive function. Calcium rice chelate is a mineral chelated to rice protein, providing an additional bioavailable pathway. Calcium carbonate and calcium hydroxide contribute a higher elemental calcium content per unit weight, ensuring the overall dose remains clinically meaningful.*
The result is 796mg of elemental calcium per serving — a substantial, meaningful dose delivered through multiple absorption pathways.*
Magnesium 322mg per serving (as magnesium oxide, aspartate, citrate & rice chelate)
Magnesium is the fourth most abundant mineral in the body and is involved in over 300 enzymatic processes — including bone mineralisation, muscle contraction and relaxation, nerve transmission, and energy metabolism. Approximately 60% of the body's magnesium is stored in bone, making it a direct structural contributor to skeletal health alongside calcium.*
As with calcium, the form of magnesium matters. Magnesium oxide provides a high elemental magnesium content but is less well absorbed on its own. Magnesium citrate is one of the most bioavailable forms, well absorbed and gentle on the digestive system. Magnesium aspartate and magnesium rice chelate provide additional complementary absorption pathways.*
The combination delivers 322mg of elemental magnesium per serving — a meaningful dose that supports not only bone health but also the muscle relaxation, nerve function, and energy metabolism that depend on adequate magnesium status.*
Vitamin D3 15mcg (600 IU) per serving (as cholecalciferol)
Vitamin D3 — cholecalciferol — is the form of Vitamin D produced naturally by the skin in response to sunlight and is the preferred supplemental form due to its superior ability to raise and maintain serum 25(OH)D levels compared to Vitamin D2. Vitamin D3 is essential for calcium absorption: without adequate Vitamin D, the intestine absorbs only 10–15% of dietary calcium. With sufficient Vitamin D, absorption rises to 30–40%.*
Including Vitamin D3 in this formula is not optional — it is what makes the calcium and magnesium meaningful. Without it, even high-quality, multi-form mineral blends cannot be fully utilised by the body.*
Why multi-form minerals matter
Single-form calcium and magnesium supplements are a compromise — they optimise for one characteristic (elemental content or bioavailability) at the expense of the other. Cal-Mag + Vit D3 combines multiple forms to capture the benefits of both: clinically meaningful elemental doses and a range of absorption pathways that work across different digestive environments and individual physiologies.*
At a glance — what this formula supports
- Normal bone density and skeletal mineralisation*
- Healthy calcium and magnesium absorption via multiple bioavailable forms*
- Normal muscle contraction, relaxation and function*
- Nervous system health and normal nerve transmission*
- Normal energy metabolism and enzymatic function*
- Vitamin D3-dependent calcium utilisation and bone support*
Quality you can verify
Every batch of Cal-Mag + Vit D3 is manufactured in a GMP-certified facility, non-GMO, and third-party tested for purity and potency. Clean formula — vegetarian capsule with no unnecessary fillers.
120 vegetarian capsules per bottle (30 servings).
*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.
Warnings
WARNING: If you are pregnant or breastfeeding, consult your physician before using this product. If you have hypercalcaemia, kidney stones, or kidney disease, or are taking medications including calcium channel blockers or bisphosphonates, consult your healthcare provider before use.
