15 SPF
- Blocks 93% of sun’s rays
- Tan to dark skin will be okay with 15 - 30 SPF, because their melanin protects from UV rays.
30 SPF
- Blocks 97% of sun’s rays
- If you have pale skin, light eyes, light hair, freckles, or moles, this is the bare minimum SPF you should have. 50 SPF is still better for you.
- If you use retinol, chemical exfoliators, acids...you’ll want to wear SPF 30 every day. These products leave your skin more vulnerable to UVA rays.
50 SPF
- Blocks 98% of sun’s rays
- If you burn easily or are often in the sun, go for this level.
- This is the recommended normal level for paler skin.
Any amount over 50 SPF
- Not recommended because it only offers marginally more coverage, not full.
- Still left vulnerable to UVA radiation
- 100 SPF, in theory has double 50 SPF (98%), but it only blocks 98.5%
- In 2011, the FDA called SPF over 50 “inherently misleading”