Yea, but happiness is a weird thing. After live changing events, both positive and negative happiness is impacted for a while, but after a couple of months most people gravitate back to their default happiness level.
Vitamin D tends to bind to the iron in multivitamins, cancelling out the effects of both. I don't know if the same goes for other combinations, but it's probably safer to get vitamins from normal food.
In my experience a lot of workers start doing a really shit job once they get told they have the slightest bit of authority over other people. Sadly that does not mean they would be worse than other upper management.
Dog is phone