Organic Plant Calcium — Vegan Tablets — Certified Organic Bone & Mineral Support*
Our Organic Plant Calcium combines certified organic red marine algae (Lithothamnion sp.) with naturally occurring co-minerals plus vitamins D₃ and K₂ in vegan tablets to support healthy bone mineralization, promote skeletal strength and density, help maintain muscle and nerve function, support calcium absorption and utilization, promote bone health with plant-based minerals, provide organic whole-food mineral matrix support, help maintain osteocalcin activation and bone strength, promote vitamin D-enhanced mineral balance, support comprehensive skeletal wellness, help maintain healthy fracture risk reduction in context, and promote overall bone, muscle, and mineral harmony* — while respecting certified organic sourcing. Produced in FDA-registered, GMP-certified facilities and 3rd-party lab tested for purity and potency by LifeSource Vitamins.
Research-Driven & Verified Product.
Explore the clinical research, ingredient science, and global evidence supporting this product below.
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. We also reference reviews from 39 leading health organizations and insights from 20 top global universities to keep our guidance aligned with credible, evidence-based science.* Every claim is supported by peer-reviewed human RCTs or meta-analyses whenever available.
Clinically Studied Benefits
✓ Supports reduction in total and hip fracture risk with calcium + vitamin D* — Calcium plus vitamin D supplementation lowers fracture incidence in older adults in RCTs and meta-analyses.*
NIH/PMC — Weaver et al., 2015
✓ Promotes enhanced calcium absorption and bone mineralization with vitamin D* — Vitamin D regulates intestinal calcium transport and supports skeletal health in clinical overviews.*
NIH/ODS — Vitamin D Fact Sheet
✓ Helps maintain bone mineral density with magnesium support* — Magnesium status associates with BMD and supports vitamin D activation in human studies.*
NIH/ODS — Magnesium Fact Sheet
✓ Supports higher hip BMD with adequate magnesium intake* — Human data show positive associations between magnesium status and bone outcomes.*
NIH/PubMed — Groenendijk et al., 2022
✓ Promotes reduced age-related bone density decline with vitamin K₂* — Long-term MK-7 supplementation attenuated BMD decline and improved bone-strength indices in postmenopausal women.*
NIH/PubMed — Knapen et al., 2013
✓ Supports osteocalcin carboxylation directing calcium to bone* — Vitamin K₂ activates osteocalcin for proper mineral deposition in skeletal tissue.*
NIH/PubMed — Shearer et al., 2010
✓ Helps maintain favorable bone turnover with red-algae mineral matrix* — Controlled studies on Lithothamnion/Aquamin report positive effects on bone markers compared to common salts.*
NIH/PMC — Aslam et al., 2010
✓ Promotes altered calcium-handling markers with algae calcium* — Human pilot crossover studies show favorable changes vs calcium carbonate.*
NIH/PubMed — Zenk et al., 2018
Additional / Promising Evidence
✓ May support dual action on bone remodeling with trace strontium* — Reviews describe mechanisms in models; trace dietary context differs from therapeutic forms.*
NIH/PMC — Aimaiti et al., 2017
✓ Contributes to natural marine mineral matrix benefits* — Red-algae provides Ca, Mg, and trace minerals in whole-food form.*
NIH/PMC — Frestedt et al., 2009
✓ Supports periodontal and dental health associations* — Calcium and vitamin D linked with periodontal measures in human data.*
NIH/PMC — Garcia et al., 2010
✓ Promotes vitamin D receptor-mediated calcium transport* — Pathways enhance intestinal uptake and skeletal support.*
NIH/PMC — Fleet et al., 2022
✓ May support bioavailability of marine-source calcium* — Reviews summarize absorption advantages of biological Ca sources.*
NIH/PMC — Xu et al., 2020
University-Led & Academic Studies
✓ Supports vitamin D roles in bone and fracture context* — Harvard T.H. Chan School provides evidence-based overviews on vitamin D for skeletal health.*
Harvard Nutrition Source — Vitamin D
✓ Promotes calcium intake guidance for bone outcomes* — Harvard T.H. Chan summarizes calcium sources and skeletal benefits.*
Harvard Nutrition Source — Calcium
✓ Supports mineral evidence for skeletal health* — Oregon State University – Linus Pauling Institute reviews calcium and magnesium in bone contexts.*
LPI — Calcium
Global Evidence & Reviews
✓ Confirms calcium + vitamin D fracture benefits* — Cochrane reviews show combination lowers incidence vs vitamin D alone in older populations.*
Cochrane Review — 2014
✓ Supports calcium and magnesium intake/safety summaries* — NIH/ODS monographs detail functions, absorption, and interactions.*
NIH/ODS — Calcium Fact Sheet
✓ Aligns with vitamin D and mineral bone health evidence* — Global authoritative overviews emphasize combined roles in skeletal support.*
NIH/ODS — Vitamin D Fact Sheet
We monitor research from leading institutions —
Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, Tufts, University of Florida, Oregon State University – Linus Pauling Institute, Columbia, Cornell, Ohio State — to align with credible science.*
Key Ingredients
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Calcium (from organic Icelandic red algae; Aquamin®)* — 1,000 mg — Certified organic plant-based source for bone mineralization support.*
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Magnesium (from organic red algae; Aquamin®)* — 70 mg — Naturally occurring for bone and neuromuscular support.*
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Vitamin D₃ (from organic algae)* — 25 mcg (1,000 IU) — Enhances calcium absorption.*
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Vitamin K₂ (as menaquinone-7)* — 120 mcg — Supports osteocalcin activation for bone strength.*
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Trace Minerals (from organic red algae; Aquamin®)* — Including iron (2 mg), strontium (5 mg), boron (60 mcg), vanadium (10 mcg) — Naturally occurring for comprehensive mineral support.*
Brief Benefit Bullets
- Plant-sourced calcium from red algae supports bone health*
- Vitamin D₃ helps calcium absorption & utilization*
- Vitamin K₂ (MK-7) helps maintain bone strength in adults*
- Magnesium intake is associated with higher hip BMD*
- Includes supportive trace minerals (e.g., boron) for mineral metabolism*
- Whole-source mineral matrix for holistic bone support*
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3rd-party lab tested for purity, potency & accuracy*
Suggested Use
Use as directed on the product label, or as advised by your healthcare professional. Do not exceed recommended dose. If pregnant, nursing, taking medications, or have a medical condition, consult your physician. Separate calcium from certain medications (e.g., some antibiotics, thyroid meds) by 1–2 hours.*
Product Specifications
- Serving Size — 3 tablets
- Vitamin D₃ (from organic algae) — 25 mcg (1,000 IU)
- Calcium (from organic Icelandic red algae; Aquamin®) — 1,000 mg
- Iron (from organic red algae; Aquamin®) — 2 mg
- Magnesium (from organic red algae; Aquamin®) — 70 mg
- Strontium (from organic red algae; Aquamin®) — 5 mg
- Vitamin K₂ (as menaquinone-7) — 120 mcg
- Boron (from organic red algae; Aquamin®) — 60 mcg
- Vanadium (from organic red algae; Aquamin®) — 10 mcg
- Other Ingredients — Organic agave inulin powder, organic tapioca dextrose, organic medium-chain triglycerides, organic coating (organic tapioca maltodextrin, organic sunflower lecithin, organic palm oil, organic guar gum), silica, organic guar gum powder.
- Quality — Third-party tested for identity, potency & purity
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.
Organic Plant Calcium — Vegan Tablets Plant-sourced calcium from red algae with co-minerals plus vitamins D₃ & K₂. 3rd-party tested. Clinically Studied Ingredients — NIH/PubMed!*
