Cal-Mag - The Complete Guide
Why Cal-Mag Liquid
Calcium and magnesium are two of the most important minerals in the body — and two of the hardest to get right.
Most calcium supplements deliver calcium in a single form, without the cofactors the body needs to actually use it. That calcium ends up deposited in the wrong places — soft tissue, arteries, joints — instead of bone. The problem is not how much calcium you take. It is whether your body can direct it correctly.
Cal-Mag Liquid was formulated to solve that problem. Multiple forms of calcium are combined with magnesium, vitamin D3, vitamin K2 as MK-7, boron, bamboo silica, L-lysine, aloe vera, and fulvic minerals. Each ingredient plays a specific role in getting calcium into bone and keeping it there.
Running through the entire formula is fulvic minerals — supporting the cellular absorption of every nutrient in the bottle.
How It Works
Multiple forms of calcium
Cal-Mag Liquid uses three forms of calcium — citrate, lactate gluconate, and lithothamnion deep sea red algae. Each form has a different absorption profile and works at a different stage of the digestive process. The combination provides more reliable absorption than any single form alone. The formula is also pre-acidified, which means it does not require stomach acid to activate — making it more bioavailable, particularly for those with reduced stomach acid.
The D3 and K2 partnership
Vitamin D3 supports normal calcium absorption in the intestine. But D3 alone does not determine where that calcium goes. Vitamin K2 — as MK-7, the most bioavailable form — activates the proteins that direct calcium into bone and away from soft tissue. A 2025 systematic review documented that D3, K2, and magnesium work together via a multi-step biological cascade — synergistic, not merely additive. Cal-Mag Liquid includes all three.
Magnesium's role
Magnesium is essential to calcium metabolism — it regulates how calcium moves in and out of cells, supports normal nerve and muscle function, and is one of the most common mineral deficiencies in adults. Without adequate magnesium, calcium supplementation is less effective. Cal-Mag Liquid provides magnesium as citrate alongside a trace amount from red algae.
The supporting cofactors
Boron supports normal calcium retention and vitamin D metabolism. Organic bamboo extract silica — standardized to 70% silica — supports normal collagen production and connective tissue structure. L-lysine supports normal calcium absorption and collagen synthesis. Aloe vera juice supports the digestive environment that makes all of this absorption possible.
Fulvic minerals
The fulvic mineral complex in Cal-Mag Liquid supports the cellular delivery of every nutrient in the formula. Fulvic minerals are natural ionic transport molecules — included across our formulas specifically for their role in supporting normal nutrient absorption at the cellular level.
What Is In This Bottle
Active ingredients per serving:
Vitamin D3 (as cholecalciferol) — 50 mcg (2000 IU)
Total Calcium (as citrate, lactate gluconate, and lithothamnion deep sea red algae) — 500 mg
Total Magnesium (as citrate and lithothamnion deep sea red algae) — 250 mg
Vitamin K2 (as Menaquinone-7 / MK-7) — 18 mcg
Fulvic Acid (as fulvic mineral complex) — 9 mg
Boron (as boron glycinate chelate) — 2 mg
Proprietary Blend (Aloe Vera Juice, Organic Bamboo Extract standardized to 70% silica, L-Lysine) — 980 mg
Other ingredients
Water (Reverse Osmosis), Natural Flavor, Citric Acid, Xanthan Gum, Rebaudioside A and Rebaudioside M Extract (from Organic Stevia Leaf), Potassium Benzoate (to preserve freshness), Potassium Sorbate (to preserve freshness), Quillaja Extract.
What is NOT in this bottle
• ✘ No artificial flavors, colors, or preservatives
• ✘ No gluten, dairy, or soy
• ✘ No sugar — naturally sweetened with organic Stevia leaf extract
• ✘ No GMOs
Quality
Manufactured in a cGMP-certified facility. Third-party tested for identity and trace mineral composition. Produced in small batches for quality and consistency.
How to Take It
Recommended serving: 1 fl oz (1 capful) daily
Take with food for best absorption. The measuring cap included with every bottle equals exactly 1 fl oz. Take straight from the cap or mix into water or juice. Shake well before each use — natural settling may occur.
Pairs well with
For comprehensive daily vitamin support: combine with Super Multi Liquid Vitamins — Super Multi does not contain calcium or magnesium, making Cal-Mag the ideal structural complement to the vitamin complex.
For foundational daily mineral support: combine with Mineral Blend — the fulvic and humic minerals in Mineral Blend support the gut environment and cellular absorption that makes Cal-Mag's nutrients more effective.
The Research
We reference peer-reviewed research on the ingredients in this formula — not our specific product.
Study 1 — D3, K2, and magnesium synergy for bone health
Systematic review and meta-analysis (2025). ResearchGate, November 2025.
D3, K2, and magnesium operate via a multi-step biological cascade — synergistic, not merely additive. Increasing calcium bioavailability, regulating its deposition in the bone matrix, and supporting key bone-related proteins including osteocalcin.
Read the study → https://www.researchgate.net/publication/397626950
Study 2 — Vitamin K2 and bone mineral density
Meta-analysis of randomized controlled trials (2024). Bone Joint Research, PMC11631259.
Vitamin K2 as MK-7 supports normal bone mineral density, particularly in postmenopausal women. Promotes gamma-carboxylation of osteocalcin, supporting calcium incorporation into bone.
Read the study → https://pmc.ncbi.nlm.nih.gov/articles/PMC11631259/
Study 3 — Calcium bioavailability in liquid form
Randomized crossover study (2023). Frontiers in Nutrition, PMC10050718.
Calcium citrate in pre-acidified liquid form supports ready absorption without requiring stomach acid for conversion.
Read the study → https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10050718/
Frequently Asked Questions
Q: Why does Cal-Mag Liquid use multiple forms of calcium?
A: Different forms of calcium absorb differently and at different points in the digestive process. Citrate absorbs well without requiring stomach acid. Lactate gluconate is highly water-soluble and readily absorbed. Lithothamnion red algae provides a naturally occurring mineral matrix alongside calcium. Using multiple forms together provides a more complete and reliable absorption profile than any single form alone.
Q: What does vitamin K2 do in this formula?
A: Vitamin K2 — as MK-7, the most bioavailable form — activates the proteins that direct calcium to bone and away from soft tissue. Taking calcium and D3 without K2 may allow calcium to be deposited in blood vessels and soft tissue rather than bone. Cal-Mag Liquid includes both D3 and K2 as MK-7 so the complete process is supported.
Q: Why is magnesium included alongside calcium?
A: Magnesium is essential to calcium metabolism. It regulates how calcium moves in and out of cells, activates vitamin D in the body, and supports normal nerve and muscle function. Without adequate magnesium, calcium supplementation is less effective. Magnesium deficiency is also one of the most common mineral deficiencies in adults.
Q: What is the role of the fulvic minerals in this formula?
A: The fulvic mineral complex supports the cellular absorption of every nutrient in the formula. Fulvic minerals are natural ionic transport molecules — small enough to pass through cell membranes — that support nutrient delivery at the cellular level.
Q: Why should I take this with food?
A: Taking Cal-Mag with food supports optimal absorption and helps avoid any mild digestive sensitivity that can occasionally occur with magnesium supplementation on an empty stomach.
Q: Is this formula suitable for vegans?
A: Yes. All ingredients in Cal-Mag Liquid are plant-based or mineral-derived. The calcium from lithothamnion red algae is a plant-based marine source.
Q: How long before I notice results?
A: Every person is different. Bone mineral density changes gradually over months with consistent daily support. More immediate effects — muscle relaxation and sleep quality — may be noticed earlier. We recommend at least 30 days of consistent daily use before evaluating.
*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.
Related Reading
The following articles go deeper on the science, sourcing, and research behind this product.
→ Calcium and Magnesium — Why You Need Both and How to Absorb Them
→ How Fulvic Acid Improves Nutrient Absorption
→ Liquid vs. Capsule Minerals — Why Format Matters for Absorption
→ Is Fulvic Acid Safe? What the Research Actually Says