I have found that since I increased my D to 2000IU daily, I don't need my light visor as much. ( I always feel better in the summer).

Last year at this time I bought that visor, I could barely function at all.
This year...I started it in Oct, and that seemed to nip it in the bud. But since I started the 2000IU D3 (I was taking 1000IU) I have only needed the visor once or twice a week now, instead of every day. ( I am not getting outside at all lately because of the ice and falling potential we have here).

Another factor is that I am now doing the R-lipoic acid 100mg/in the morning.
This is really giving me energy big time... better than a caffeine jolt!

Makes one wonder how much "depression" is other metabolic failures? Part of aging, part insulin resistance, etc?