Revise GCSE Physics


Question:What are the advantages and disadvantages of having light or dark skin?

Skin Type Advantages Disadvantages
Lighter Produces vitamin D more easily (less sunlight required) Provides poorer protection against Ultra Violet Radiation (This does improve when a tan forms)
Darker Much better protection against UV radiation Requires more sunlight to produce healthy levels of Vitamin D. Risk of Vitamin deficiency; especially if living in northern climates or where diet is also poor.