Algae Calcium — Plant-Based Calcium from Red Marine Algae (with D₃, K₂, Magnesium & Trace Minerals)*
Sustainably sourced red marine algae (Lithothamnion sp.) provides a naturally mineral-rich calcium source with magnesium and trace elements to support healthy bone mineralization, muscle/nerve function, and overall skeletal health.* Includes vitamin D₃ (from organic algae) and vitamin K₂ (MK-7) as listed on the label. Produced in FDA-registered, GMP-certified facilities and
3rd-party lab tested for identity, potency & purity.*
Research Promise: At LifeSource Vitamins, our commitment is rooted in research and results. Every benefit below is supported by human clinical studies indexed in the National Institutes of Health (NIH) via PubMed, with full texts available in the National Library of Medicine (NLM) PubMed Central (PMC) when available. In addition, we reference reviews from 39 leading health organizations and insights from 20 top global universities to ensure our guidance aligns with credible science.*
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Clinically Studied Benefits (human RCTs, meta-analyses & authoritative reviews)
• Fracture risk (older adults): Calcium + vitamin D lowers fractures in select institutional/older populations; vitamin D alone is insufficient. (NIH/PubMed — Chapuy M, 1992)(NIH/PubMed — Avenell A, 2014)
• Fracture prevention (meta-analysis): Calcium ± vitamin D supports prevention in adults ≥50; dosing context matters. (NIH/PubMed — Tang B, 2007)
• Total fractures (pooled data): Combined calcium + D associated with ~15% lower total fractures. (NIH/PubMed — Weaver C, 2016)(NIH/PMC — Weaver C, 2015)
• Secondary hyperparathyroidism & hip bone loss: Calcium + D₃ reversed senile secondary hyperparathyroidism and reduced hip bone loss/fracture risk in elderly women. (NIH/PubMed — Chapuy M, 2002)
• Calcium absorption — citrate advantage: Studies show higher absorption with calcium citrate vs carbonate (esp. fasting/varied conditions). (NIH/PubMed — Sakhaee K, 1999)(NIH/PubMed — Harvey J, 1990)
• Vitamin D supports absorption: Vitamin D status enhances intestinal calcium absorption and mineral balance. (NIH/ODS — Vitamin D)
• Magnesium & skeletal health: Adequate magnesium supports bone formation and neuromuscular function; low status linked to poorer skeletal outcomes. (NIH/ODS — Magnesium)
• Vitamin K₂ (MK-7) — osteocalcin & bone strength: Long-term MK-7 improved vitamin K status and attenuated age-related BMD decline in postmenopausal women. (NIH/PubMed — Knapen M, 2013)
• MK-7 — carboxylation (dose-finding RCT): Low-dose daily MK-7 improved osteocalcin γ-carboxylation. (NIH/PubMed — Inaba N, 2015)
• MK-7 — mixed outcomes (context): A 3-year RCT in osteopenic women found no BMD advantage vs placebo when both arms received Ca + D; underscores population/dose context. (NIH/PubMed — Rønn S, 2021)
• Dental mineralization: Adequate calcium with vitamin D supports enamel/tooth mineral maintenance. (NIH/MedlinePlus — Calcium)
Additional Studies Showing Promising Benefits*
• Mineral-rich algae complex (Aquamin®/Lithothamnion): Translational/early human work reports favorable effects on bone turnover/formation markers vs common salts; larger RCTs needed. (NIH/PMC — Aslam M, 2010)(NIH/PubMed — O’Gorman D, 2012)
• Microalgae as vitamin D sources: Reviews identify D₃ occurrence in algae and potential for vegan D₃ sourcing (supports label’s algal D₃). (NIH/PMC — Jäpelt R, 2013)(NIH/PMC — Del Mondo A, 2020)
• Magnesium status & BMD: Observational/human data associate higher magnesium intake/status with favorable BMD; responses vary by baseline. (NIH/ODS — Magnesium)
• Citrate vs carbonate — method nuance: Some work found comparable absorption with meals; underscores timing/formulation context. (NIH/PubMed — Heaney R, 1999)
• Strontium (trace dietary): Present naturally in algae-derived complexes; therapeutic strontium ranelate data do not apply to trace amounts in foods/supplements (context note).
• Safety & dosing context: Authoritative monographs summarize adult ULs and interactions for calcium, vitamin D, magnesium, vitamin K. (NIH/ODS — Calcium)(NIH/ODS — Vitamin D)
University Studies (nutrient-specific context)
• University-affiliated groups (e.g., Harvard, Johns Hopkins, Cambridge) have contributed to analyses of calcium + vitamin D for fracture prevention and vitamin K₂ (MK-7) for osteocalcin activation and bone quality markers (see PubMed citations above). Mentions remain plain text per SOP unless .edu HTML is available.
Global Evidence & Authoritative Reviews
• Authoritative organizations (Mayo Clinic, Cleveland Clinic, EFSA/EMA, NCCIH) discuss nutrient roles in bone health and safety for calcium, vitamin D, magnesium, and vitamin K. When PubMed/PMC-indexed summaries are available, we hyperlink; otherwise plain-text mentions per SOP.
We monitor research from the world’s leading institutions — including Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge University, Oxford, Stanford, Yale, MIT, the University of Florida, Oregon State University – Linus Pauling Institute, Boston University, Cornell, Columbia, and Ohio State — to ensure our guidance remains aligned with the highest standards of credible science.*
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Brief Benefit Bullets
• Plant-based calcium from red marine algae (Lithothamnion) with naturally occurring magnesium & trace minerals*
• With vitamin D₃ (algal) for absorption and vitamin K₂ (MK-7) for osteocalcin activation*
• Supports bone mineralization, muscle relaxation & nerve function*
• Whole-food mineral matrix; vegan-friendly*
• 3rd-party lab tested for identity, potency & purity
Product Specifications
• Serving Size — 3 tablets
• Servings Per Container — 30
• Vitamin D₃ (from organic algae, VegD3®) — 25 mcg (1,000 IU) — 125% DV
• Calcium (from Aquamin® red algae) — 930 mg — 72% DV
• Magnesium (from Aquamin® red algae) — 68 mg — 16% DV
• Organic Veggie & Fruits Blend — 25 mg — **
• Strontium (from Aquamin®) — 5 mg — **
• Vitamin K-2 (as menaquinone-7) — 80 mcg — **
• Vanadium (from Aquamin®) — 30 mcg — **
• Other Ingredients — Stearic acid, magnesium stearate, cellulose gum, cellulose, silica
• Form — Tablets
• Quality — Third-party tested for identity, potency & purity
Suggested Use
See product label for full instructions, or as directed by your healthcare professional. Do not exceed recommended dose. If pregnant, nursing, taking medications, or have a medical condition, consult your physician.*
LifeSource Vitamins — Proudly American — Since 1992
*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.*
Algae Calcium with D₃, K₂, magnesium & trace minerals supports bone mineralization, muscle/nerve function; vegan source; 3rd-party tested. Clinically Studied Ingredients — NIH/PubMed!*
