Essential oils: Essential oils are plant extracts that emit distinct, often appealing scents. Some contain naturally occurring chemicals that can irritate skin, trigger allergic reactions or cause other toxic effects. Don’t assume that essential oils are safe simply because they come from plants. Approach them with the same safety questions you bring to other ingredients or products.
When trying a new product containing an essential oil, always use a small amount at first to see if you have an allergic reaction. Never apply pure essential oils directly to your skin. Avoid using products that are old or that have been exposed to light, because some essential oils react with air and sunlight to produce new and sometimes more hazardous chemicals.