been linked to asthma, obesity, and metabolic syndrome.

Alternative: Open windows regularly, use houseplants, or apply natural essential oils sparingly.

5. Dry-cleaned clothing

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A common solvent used in dry cleaning, perchloroethylene, is classified as a probable carcinogen. It can be absorbed through the skin or inhaled, potentially affecting the liver, kidneys, and nervous system. Long-term exposure has been linked to Parkinson’s disease.

Tip: Remove plastic covers immediately and air clothes outdoors or in well-ventilated spaces.

4. Poorly cleaned humidifiers

Without regular cleaning, humidifiers can harbor bacteria and mold, including harmful species that are released directly into the air and inhaled.

Prevention: Change water daily and clean the unit every few days using vinegar or a mild disinfectant.

3. Scented paraffin candles

Burning paraffin releases compounds such as benzene and formaldehyde, which contribute to arterial inflammation and plaque formation in