The ideal way to provide building blocks for metabolism and repair is to provide the most basic building blocks possible. Sometimes, due to many different factors, the body needs a product that doesn't require multiple steps to do it's job.
Vitamin D is an example. We have very complex and effective ways to synthesize Vitamin D (which is a hormone, not a vitamin) via skin exposed to the sun.
If you live in a northern climate, have dark skin, obesity, or are elderly, the system may not be able to keep up and you benefit from supplementation.
When you supplement, you need to know the correct amount to take, and what to take with the Vitamin D (K2 and Vitamin A) and some fat; taking the supplement incorrectly can result in too much or too little Vitamin D.
When taking any supplement, it is a good idea to know why you are taking it, and if are you taking the safest most effective substance to support your body as it maintains your health.
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.