Calcium 1000 mg with Vitamin D3
Calcium 1000 mg with Vitamin D3 and 3 near-identical products are sold under 3 different brand names — a exact-twin Formula Twins cluster.
| Product | Brand |
|---|---|
| Calcium 1000 mg with Vitamin D3 | Sundown Naturals |
| Oyster Shell Calcium 500 mg | Windmill |
| Calcium 500 | 21st Century |
| Natural Oyster Shell Calcium 1000 mg With Vitamin D3 | Sundown Naturals |
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