Question: what is the best quality vitamin d3?
Answer: B- Natural Factors Vitamin D3., B- Kirkland Signature Extra Strength Vitamin D3., B- Source Naturals Vitamin D3., C+ GNC Chewy Vitamin D3., C VitaFusion Vitamin D3 Gummy Vitamins., C TriSorb Vitamin D., C- Natrol Vitamin D3., F Nature Made Adult Chewable D3.