The answer to 'why is my silverfish health risk' is that silverfish are not generally considered a major health risk to humans. However, they can contaminate food and damage household items like books, wallpaper, and fabrics. Silverfish infestations can also trigger allergic reactions in some people.
Silverfish feed on carbohydrates, proteins, and starches, and they thrive in damp, dark environments like bathrooms, basements, and attics. While they don't bite or spread diseases, their presence can be a nuisance and lead to property damage over time.