This question is about Running
While runners can get many nutrients from a healthful, well-balanced diet, they may not get all of them on a regular basis, which puts them at risk for a nutrient deficiency. Additionally, research has found that many athletes fail to consume enough calories, which can lead to a lack of adequate amounts of vitamins and minerals [ 1 2
Kerksick, C.M., Wilborn, C.D., Roberts, M.D. et al. ISSN exercise & sports nutrition review update: research & recommendations. J Int Soc Sports Nutr 15, 38 (2018). https://doi.org/10.1186/s12970-018-0242-y
Rautiainen, S., Manson, J. E., Lichtenstein, A. H., & Sesso, H. D. (2016). Dietary supplements and disease prevention - a global overview. Nature reviews. Endocrinology, 12(7), 407–420. https://doi.org/10.1038/nrendo.2016.54