Please supplement Vitamin D this winter. A lot of people have a natural vitamin D deficiency and it gets even worse in winter where there is less sunlight. If you struggle with seasonal depressive symptoms that get worse during winter it can be due to a vitamin D deficiency. I also sometimes take a high dose supplement of St Johns Word called Laif 900 during winter. It works as well as any chemical SSRI and is great to counteract the Winter blues. Don't take it with other SSRIs though and be careful if you have many allergies or you take a lot of other medications as it has potential to interact with different substance classes. People say it enhances photosensitivity but I never had a bad experience even sun tanning and studies show this is overestimated.