Medically reviewed by Jonathan Purtell, RDN The best time to take vitamin C to boost your immune system is with meals ...

When you think about the best vitamins for your immune system ... there is conflicting research as to whether elderberry can shorten the flu, and one 2019 study published in Complementary ...

Healthline’s writers, editors, dietitians, and medical team spend a lot of time evaluating nutritional supplements. In fact, we’ve reviewed and vetted more than 450 supplement brands.

Shop the best supplements below to support your immune ... black elderberry to help treat cold and flu symptoms, olive leaf, beta-glucans, astaxanthin (a powerful antioxidant) and reishi mushroom.

Breastfed infants and children with certain medical conditions are also susceptible to vitamin D deficiency. If a healthcare professional has recommended a vitamin D supplement for calcium ...