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- MiramarLv 48 years agoFavorite Answer
Age has nothing to do with yellow toenails. It may be a fungal infection, it can be caused by poor circulation (think iron-deficiency), diabetes, a poor immune system in general, etc.
To prevent fungal infections, simply keep your feet clean and dry. A doctor is also able to prescribe anti-fungal cream if you're needing a quicker fix.
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