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.