this video by Dr Michael Holick PhD, MD, gives lots of information in an easy to understand and entertaining hour.
https://vitamindsociety.org/index.php
Thanksgiving Day has so many special aspects that highlight how much we have to be grateful for. You get to pick your focus- family, friends, football, feast, foliage and so much more. It is easy to get swept up in the planning, or to feel sadness if something from the past is no more- Taking a few moments to get quiet, and focus on what is going right can turn that around.