Coal tar can be harmful under specific conditions, particularly at very high concentrations or when used in combination with other treatments.
While coal tar is used in various products, including medicinal ones, the potential for harm depends significantly on the concentration and the context of use.
According to studies, some of the chemicals in coal tar may increase the risk of cancer. However, this risk is typically associated with very high concentrations, such as those found in industrial paving. This suggests that the risk is concentration-dependent.
Furthermore, an increased risk has been observed in specific medical treatments. Patients with psoriasis treated with a combination of coal tar and UVB radiation have shown a reported increased risk of skin cancer. This highlights that the potential for harm can also depend on how coal tar is used, especially when combined with other therapeutic methods.
In summary, the safety of coal tar is not absolute and is closely tied to its concentration and application. Lower concentrations in therapeutic products are generally considered safer, but the risk increases significantly with high concentrations or when used in specific combined therapies.
