Archive · 4 Aug 2025
Decoding SPF: Understanding Sunscreen Effectiveness and Choices
SPF, or Sun Protection Factor, tells you how well sunscreen blocks the sun's harmful UVB rays, which cause sunburn.
SPF 30 is good, but SPF 50 is only a little better.
You need to put on enough sunscreen and reapply it every few hours.
Broad-spectrum sunscreen protects against both UVA and UVB rays.
In India's climate, you need sun protection all year round, even indoors.
Make sure to choose the right sunscreen for your skin type and the activity you are doing.
Always follow the instructions on the bottle and reapply frequently.
SPF indicates how well a sunscreen protects against UVB rays, the main cause of sunburn.
SPF 30 blocks about 97% of UVB rays, while SPF 50 blocks around 98%.
Sunscreen must be applied properly and reapplied every 3-4 hours for effective protection.
Broad-spectrum sunscreen is needed for protection against both UVA and UVB rays.
Sunscreens are regulated by the Central Drugs Standard Control Organisation (CDSCO) in India.
- Who
- Dermatologists and consumer advocacy groups are providing insights.
- What
- An examination of sunscreens, their SPF values, and their effectiveness.
- When
- Findings are based on recent studies and reports from 2025 and ongoing analysis.
- Where
- India and Australia are the primary locations discussed.
- Why
- To inform consumers about sun protection and choosing the right sunscreen.
Sunscreen Label Claims
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SPF Exaggeration
Sunscreen Label Claims
Some sunscreen labels exaggerate SPF values.
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- SPF Meaning
- Sun Protection Factor; measures UVB protection
- SPF 30
- Blocks approximately 97% of UVB rays
- SPF 50
- Blocks approximately 98% of UVB rays
- Reapplication
- Every 3-4 hours
- UVA Protection
- Requires broad-spectrum sunscreen
- Regulation in India
- CDSCO