[i] https://www.health.harvard.edu/womens-health/are-sunless-tanning-products-safe

 

[ii] https://www.fda.gov/radiation-emitting-products/tanning/ultraviolet-uv-radiation#4

 

[iii] https://www.fda.gov/radiation-emitting-products/tanning/risks-tanning#1

 

[iv] https://www.fda.gov/radiation-emitting-products/tanning/risks-tanning#1