I love these. I am Vitamin D deficient due to a thyroid issue, and was told by my doctor to get Vitamin D-3 when my round of 50,000 IU Prescription D was finished. It has been discovered that many people who suffer certain thyroid issues are deficient in this vitamin. It causes lethargy and brain fog among other things.
https://www.amazon.com/NOW-Vitamin-D-3-000-Softgels/dp/B0032BH76O

