And "natural" plant extracts does not mean pure, clean or perfect either. According to the cosmetics trade journal, Drug and Cosmetic Industry, "all plants (including those used in cosmetics) can be heavily contaminated with bacteria, and pesticides and chemical fertilizers are widely used to improve crop yields".
Some plants can also contain toxic ingredients. For example, comfrey (an ingredient in certain herbal cosmetics) which contain substances known as pyrrolizidine alkaloids, is potentially poisonous if absorbed through cracked or broken skin.
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