The SPF numbers can be confusing. Many of us may be tempted to grab the bottle with the highest SPF we could get our hands on, but are they very different?

For all intense and purposes, SPF 50 is adequate as it blocks 98% of the UV rays. Comparatively, a sunscreen with SPF100 blocks 99% of the UV rays. So the protection does not increase proportionately.

On the other hand, if you apply a sunscreen with SPF50 too thinly, say half the recommended dosage, you can be getting the functional equivalent of SPF25. Or if you have applied the right amount but forgot to reapply, the effective SPF also falls.

Combining sunscreens does not mean you are combining their SPF protection. You may end up diluting the SPF factor of the higher SPF sunscreen.

SPF protects you from UVB rays, but your sunscreen should also protect you from UVA. The longer ray UVA can penetrate many fabrics. They can cause premature ageing, pigmentation and posts a long term cancerous risk.

Take steps to protect yourself from the sun, including the following:

  • Look for a sunscreen with SPF 50 and UVA protection
  • Apply proper amounts
  • Reapply every 2 hours
  • Use additional protection, such as hats, sunglasses and umbrellas
  • If you’re exercising or swimming, use UV-blocking sports fabrics