D3 Serum 5,000 IU
D3 Serum 5,000 IU and 3 near-identical products are sold under 3 different brand names — a near-twin Formula Twins cluster.
| Product | Brand |
|---|---|
| D3 Serum 5,000 IU | Premier Research Labs |
| D3 Gold 5,000 IU | Quantum Nutrition Labs |
| Liquid Vitamin D3 400 IU | Protocol For Life Balance |
| D3 Gold 5,000 IU | Quantum Nutrition Labs |
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