It will take away from the plant but to turn it yellow.. no. Typically a healthy plant will start to show small spots on the top. When you flip it over you will see eaten material, eggs and mites. Thats a different deficiency you are having and easier for anything to attack a weaker plant.
Tell me please, do you seem to have a fungus gnat problem. It is abit hard to properly diagnose a problem, though without pics. And could you please elaborate on the plants environment, growing medium, nute regimen, PH etc.