The immune system is your body’s primary mechanism of defense, responsible for protecting you from potentially harmful invaders, including viruses. The following evidence-based dietary supplement ingredients may provide immune support:
Astragalus (Astragalus membranaceus)
Astragalus is a botanical herb with anti-inflammatory, antioxidant, anti-viral, and immunomodulating properties. Studies suggest it may improve outcomes of inflammatory conditions and certain cancers.
Probiotics
Probiotics are beneficial live microorganisms that may support immune health by modulating immune responses and inhibiting the growth of pathogens in the gastrointestinal tract. Probiotic supplements may help protect healthy individuals against respiratory infections, reduce the severity of colds, and improve the efficacy of certain influenza vaccinations.
Vitamin C
Vitamin C deficiency may result in lowered immunity and a higher risk of infections. Supplementing with vitamin C has been shown to be effective in treating respiratory and systemic infections.
Vitamin D
Individuals with vitamin D deficiency are at increased risk of contracting upper respiratory tract infections, such as the common cold, compared to individuals with normal vitamin D levels. Vitamin D supplementation may support immune tolerance in autoimmune conditions and enhance the antimicrobial effect of certain immune cells.
Zinc
The mineral zinc is commonly recommended to protect against the common cold. Zinc lozenges, when taken at the onset of a cold for a minimum of one to two weeks, may help reduce the symptoms and duration of colds in children and adults.
