People tend to catch more colds, flu and viruses (and get sicker from them) in the dark winter months when we get very little sunshine. Our bodies make vitamin D when sunlight acts upon our skin, so we struggle to make enough in winter, which explains why there is a surge in respiratory illnesses, hospitalisations and deaths at that time of year.
Boost Immunity With Vitamin D3
Vitamin D3 plays an important role in supporting your body’s natural immune function. D3 activates specific peptides in the immune system that help to defend against external threats. These peptides stimulate immune cell activity, which promotes strong immune responses.
Reduced vitamin D3 levels can adversely affect your immune cells’ ability to protect your body against invasive environmental threats. For T cells and other immune cells to function properly, they must first encounter an external threat. When this occurs, the T cells seek out vitamin D3, and if they can’t find it, it can’t be activated and can’t be mobilised to protect you.
Your innate immune system also benefits from sustained vitamin D3 levels because it encourages the purifying properties of macrophages (innate immune cells). The macrophages identify and protect against environmental threats and also activate T cells. Macrophages also activate cleansing peptides, which break down toxins so they can be easily removed from the body.