Astragalus, Vitamin C & Elderberry
Astragalus, Vitamin C & Elderberry and 3 near-identical products are sold under 4 different brand names — a exact-twin Formula Twins cluster.
| Product | Brand |
|---|---|
| Astragalus, Vitamin C & Elderberry | Vitamin World |
| Vitamin C 250 mg | Kirkman |
| Immune Support System Strength | Quantum Health |
| Immune Plus Sleep | Puritan's Pride |
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