Zinc deficiency is linked to a lowered immune system.
If someone starts catching colds or infections more easily, this could be a sign of a zinc deficiency, said the Center for Family Medicine.
The health site added: “Additionally, evidence shows that when someone takes zinc within 24 hours of the start of cold symptoms, zinc can shorten the length of the cold.
“Zinc also supports healthy skin and proper blood clotting. A wound that won’t heal can be another sign of zinc deficiency.
“Additionally, unexplained hair loss is a common symptom of zinc deficiency.”