Taking vitamins without knowing whether your body needs them has become a common health habit. But what happens when the supplements meant to protect your health begin working against it?

a lower adult limit of 25 milligrams.

These differences reflect distinct regulatory assessments rather than evidence that every dose below one particular number is harmless for everyone.
6. Selenium: Too Much Can Cause Hair Loss and Nail Damage

Selenium is a trace mineral required for normal thyroid function and antioxidant defense.

However, the body needs only small amounts.

Excessive selenium intake can produce a condition known as selenosis.

Symptoms may include hair loss, brittle nails, nausea, fatigue, gastrointestinal disturbances, and a garlic-like odor on the breath.

More severe toxicity can affect the nervous system.

The risk can increase when someone