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  1. The health effects of vitamin D supplementation: evidence from ... - Nature

  2. Nature Made Vitamin D3 1000 IU (25 mcg), Dietary Supplement …

  3. Effect of vitamin D3 supplementation on cellular immunity and ... - Nature

  4. Nature Made Extra Strength Vitamin D3 5000 IU (125 mcg), …

  5. Association between vitamin D supplementation and COVID-19 ... - Nature

  6. Extra Strength Vitamin D3 125 mcg Softgels - Nature Made®

  7. Nature Made Vitamin D3 K2, 5000 IU (125 mcg) Vitamin D, …

  8. Vitamin D3 5000 IU (125 mcg) Fast Dissolve Tablets - Nature

  9. Vitamin D3 2000 IU Tablets - Nature Made®

  10. Nature Made Extra Strength Vitamin D3 5000 IU (125 mcg), Bone …