In earlier posts we explored the relationship between vitamin D level, Omega-3 Index, and vitamin C intake and the occurrence of colds and the flu separately. In the final blog post of this series, using the data you provided for the GrassrootsHealth study, we’ll explore whether vitamin D, omega-3, and vitamin C have a combined … Continue reading Combined Nutrient Effects: Do vitamin D, omega-3, and vitamin C have a combined effect on colds and the flu among GrassrootsHealth participants?