I take Healthspans super strength vit d. I also take their vit k2 to go with them-1 tablet.
Hubby takes too as he manages a warehouse and gets limited sunshine. His mood lifted too, but I took that to be from getting out of the pressure from managing another warehouse and having been told by a counsellor some home truths. However, it may not be all the stress and hometruths as he too for first time in years has been so chirpy its like having a new hubby!!
I like healthspan products though, although they are more expensive than other places.