Real dairy yoghurt that does not contain added sugars is an immune-boosting food for many reasons. For one, it contains vitamin D. Lower levels of this nutrient have been linked to increased risk of developing immune-related diseases. Therefore, taking in enough of this nutrient may help reduce this risk and support a healthy immune system.
Yoghurt often contains probiotics, or live bacteria that offers a benefit to the host. Probiotics have been shown to offer a slew of health benefits to humans, including immune support — depending on which probiotic strain is ingested and maintained. Choosing yoghurt with live and active bacteria can help support a healthy immune system. Keep in mind that shelf-stable yoghurts and some non-dairy yoghurts may not contain probiotics.