Sunscreen: the one skincare step doctors want everyone to use daily

How much is enough, do you need to reapply indoors, and what SPF and PA mean, in short.

How much: for the face, roughly two finger-lengths of cream
SPF measures protection from UVB, which causes burning. Choose SPF 30 or higher
PA measures protection from UVA, which ages skin. The more plus signs, the better
Reapply every 2 hours when outdoors, and after sweating or swimming

References

American Academy of Dermatology. How to apply sunscreen. aad.org
Hughes MCB, et al. Sunscreen and prevention of skin aging: a randomized trial. Ann Intern Med. 2013;158(11):781–790.

Results vary from person to person. Every programme starts with an assessment by a doctor.

Articles28 October 2026

Firm, springy skin comes from a network of collagen, elastin and hyaluronic acid in the dermis. Here is how that network changes with age.

Videos14 October 2026

A new show from CHANUN Clinic by Dr. PP mixing beauty and astrology. Episode one is about auspicious timing.