Yellow nails are not reserved for smokers or the elderly: many other factors can cause yellow nails. In this blog, your expert nail supplier Maryton will explain everything to you. The causes of yellowed nails are very numerous: A sickness Most often, yellow nails are caused by a disease. This ranges from a simple mineral deficiency to a more serious illness, such as diabetes, psoriasis, thyroid dysfunction, or even chronic bronchitis. Nail polish Nail polish can also yellow the nails, especially dark colored nail polish or in red-orange tones. It is the pigments contained in the varnish that will impregnate and therefore color …