If you want to support your immune system and to boost the nutrition, I can freely advise to use detox drink which is a really effective solution if you want to support your health. It is a good supplier of vitamins, because this drink is made under the best shamanic receipts and can support your organism. 

Drink more tea

Eat a lot of vitamins

Support your health during the whole winter period with supplements and special vitamins

Personally, in winter I often have some kind of deessive state and bad mood. Of course my immunity is very poor.

In the wintertime, I also often experience a desession about the cause of the lack of heat and sunlight. Of course, I take multivitamins and I also definitely buy myself a delta 8 cartridge for a good mood. I discovered cbd vaping about two years ago and since then my life has sparkled with bright colors and good mood even in the winter cold.