1. https://www.health.harvard.edu/womens-health/are-sunless-tanning-products-safe
  2. https://www.fda.gov/radiation-emitting-products/tanning/ultraviolet-uv-radiation#4
  3. https://www.fda.gov/radiation-emitting-products/tanning/risks-tanning#1
  4. https://www.fda.gov/radiation-emitting-products/tanning/risks-tanning#1