21st Century Calcium Magnesium Zinc Review
21st Century Cal Mag Zinc +D3 offers a comprehensive blend of essential minerals and Vitamin D3, meticulously formulated to support overall wellness. This convenient daily supplement combines Calcium, Magnesium, and Zinc, a vital trio known for their synergistic benefits, along with Vitamin D3 to enhance their efficacy. Specifically, each serving delivers 1,000 mg of Calcium (as Calcium Carbonate), 400 mg of Magnesium (as Magnesium Oxide), 15 mg of Zinc (as Zinc Oxide), and 10 mcg (400 IU) of Vitamin D3 (as Cholecalciferol). This powerful combination is designed to provide robust support for bone health, with Vitamin D3 playing a crucial role in aiding calcium absorption, ensuring that your body can effectively utilize this key mineral for strong bones. Beyond skeletal support, the formula also contributes to normal muscle function, helping to maintain muscle health and performance. Furthermore, both Zinc and Vitamin D3 are recognized for their significant roles in bolstering immune health, offering an added layer of defense for your body's natural protective systems. Committed to quality and purity, 21st Century Vitamins has been a trusted name in the supplement industry for over 35 years. The brand upholds the highest standards in every product, from the careful sourcing of premium-grade ingredients through a stringent vendor certification program to rigorous testing and production processes. This dedication ensures that each product, including Cal Mag Zinc +D3, meets exacting quality benchmarks for purity and potency, providing consumers with a reliable and effective supplement. This particular formula is also proudly Gluten-Free and Non-GMO, catering to various dietary preferences and needs. Adults are directed to take three tablets daily with any meal, or as advised by a healthcare provider, to achieve optimal results. The product is available in both 90 and 250 tablet sizes, offering flexibility for consistent daily nutrient support. Additionally, it is eligible for payment using HSA/FSA funds, making it an accessible option for managing health expenses. The brand emphasizes transparency, advising customers to always refer to the product packaging for the most up-to-date ingredient and allergen information, especially for those with specific sensitivities. This holistic approach to formulation and quality assurance underscores 21st Century's commitment to supporting your wellness journey every step of the way.
Study, Trial or Testing Result SummaryMembersHuman studies
Review Totals and SummaryMembers112,615 reviews
Biohacker SummaryMembersWhat our biohacker panel says
RAL SummaryMembersThe tier and why
More DetailsMembersBody systems · Combine with · Possible side effects
Supplement FactsVitamin D₃ 10 mcg · Calcium 1000 mg · Magnesium 400 mg
| Vitamin D₃ (as Cholecalciferol) | 10 mcg | 50% |
| Calcium (as Calcium Carbonate) | 1,000 mg | 77% |
| Magnesium (as Magnesium Oxide) | 400 mg | 95% |
| Zinc (as Zinc Oxide) | 15 mg | 136% |
Other ingredients: Cellulose, Croscarmellose Sodium, Gum Acacia. Contains <2% of: Magnesium Silicate, Magnesium Stearate, Polyethylene Glycol, Polyvinyl Alcohol, Silicon Dioxide, Stearic Acid, Titanium Dioxide.
Directions: As a mineral supplement, adults take three (3) tablets daily with any meal or as directed by a healthcare provider. Do not exceed recommended dosage. Individual results may vary.
Barcode (UPC) 740985222638 · Label source: 21stcenturyvitamins · Report a label change
Graded October 23, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.

