What Are the Side Effects of Triclosan?

According to the FDA, tricloscan has not been shown to have harmful side effects in humans. The FDA warns that tricloscan has been shown to alter hormone regulation in laboratory tests on animals, but reminds consumers that lab results for animals do not necessarily predict the potential effects on humans.

The Mayo Clinic cautions consumers pointing to evidence that tricloscan leads to antibiotic-resistant germ strains and that tricloscan may be harmful to the immune system. Despite the data showing poetential harm, the FDA has approved tricloscan for use in consumer health products such as toothpaste and antibacterial soap, and has concluded that there is insufficient evidence of harm to withdraw approval.