Sun protection

It is recommended to apply sunscreen 30 minutes before sun exposure based on testing methods. Protocols require a 15 to 20 minute drying period before measuring the sun protection factor to ensure water resistance. No evidence indicates sunscreen efficacy is delayed.

It depends on the activity. For prolonged exposure at the pool or beach, we recommend reapplying the sunscreen every two hours. In contrast, for a commute between home and the office, a single application in the morning is sufficient.

The SPF measures the filtration rate of erythemal UV rays by a sunscreen, which comprise 85% UVB and 15% UVA.

According to some studies, applying sunscreen for several consecutive days before UV exposure may establish a baseline protection in the skin. This might suggest that switching to SPF 30 is possible after using SPF 50 for several days. However, research remains limited, and as a precaution, a high SPF is recommended throughout the exposure period.

Makeup products with SPF offer supplementary protection but are insufficient on their own for complete, lasting sun protection because they are not applied in sufficient quantities.

Yes, it is recommended to apply a sunscreen throughout the year. Even in winter, lower UV levels can accelerate photodamage and worsen photosensitive conditions such as hyperpigmentation or acne.

Waterproof sunscreens offer limited water resistance. They cover swimming and must be reapplied after swimming.

No, SPFs cannot be added together. However, pairing skincare with a sunscreen helps ensure that enough sunscreen is applied to reach the labelled protection factor.

Yes, a sunscreen is necessary under a parasol because UV rays reflect off sand and water.