I'm telling ya, it is great for depression.
I got off of an AD (double, triple check with- your doctor if on one and wish to taper off) by taking D3, B Complex and Fish Oil. The D3 (liquid gel) was a major component for my mix.
There is all sorts of research out there indicating how most people are slightly deficient in D and that it helps fight depression, stroke, heart problems and many other health conditions including cancer.
I know a friend in the medical field who takes a very high dosage most of the year, but then takes a smaller one during the summer months (June, July and August) since she likes to garden and spends a fair amount in the direct sunlight. However, the rest of the year she doesn't like to take chances and takes the maximum dosage.
I take a moderate dosage all year long, every day. If I feel "blue," I will take a higher dosage for a few days.
Totally believe in D3 and my B vitamins. I take the Fish Oil mostly for good heart health, but know that it can also help for depression (prevention). All together...it has been a big success for me.
This is a very good video with information from
UCSD college of medicine.
[ame="http://www.youtube.com/watch?v=TQ-qekFoi-o"]YouTube- Vitamin D Prevents Cancer: Is It True?[/ame]