Considerations

• Should Not Be Used in Toothpaste Activated charcoal has proven to be highly abrasive to enamel. It may provide temporary whitening as it removes surface stains, but leads to yellowing with long-term use, as enamel is worn and dentin (which is yellow) becomes exposed. • Contamination Concerns Activated charcoal can contain trace amounts of polyaromatic hydrocarbons (PAHs), a class of carcinogenic chemicals. Naphthalene and Benzo[a]pyrene have been found in commercial cosmetic products containing activated charcoal. One study suggests that testing methods manufacturers use to ensure purity may not be sufficient to detect these chemicals. Activated charcoal may also contain nanoparticles. • Permanent Skin Damage Some case studies have found that facial products containing activated charcoal caused permanent skin damage or severe inflammation. Cases of permanent hypopigmentation and enlargement of pores have been reported.