Opposite to what we may think, the percentage of melanin present in your skin, which makes your skin colour darker, does not influence the level of SPF you need. Darker skin still needs to be protected against harmful rays, with at least SPF 30. However, when you have a lighter skin tone, you should apply sunscreen more frequently, since the melanin in your skin might not resist the sun for as long.
The minimum level of SPF recommended for each skin type during the average day is:
Dry skin: use SPF 30
Sensitive skin: SPF 50 as skin is more susceptible to damage, factor 50 will provide stronger protection
Mature skin: also use SPF 50 for similar reasons to sensitive skin, skin becomes more fragile with age
What you should remember about the SPF number is: the higher it is, the longer and better your skin is protected against UV rays. If you have a skin condition and are unsure on the SPF you should be wearing, we would advise you to talk to your doctor.