Daily Sunscreen
- The claim
- Prevents visible skin aging, not only skin cancer.
- The verdict
- Randomized evidence that daily use measurably slows visible aging over years.
- Worth it?
- Yes, and it is the cheapest thing on this list by a wide margin.
What the evidence supports
The Nambour trial randomized adults to daily broad-spectrum sunscreen or discretionary use and followed them for four and a half years, with skin surface microtopography as the outcome. The daily-use group showed no detectable increase in photoaging over the period; the discretionary group did. That is a rare thing in this field: a randomized, long-duration, hard- outcome study of a preventive measure. The practical caveats are ordinary ones — the amount applied is almost always less than the amount tested, and reapplication matters more than the number on the bottle.
Why this entry is short
This is a graded stub. The verdict, the grade and the citations are settled and reviewed; the long-form write-up is queued behind a recorded consult-room explanation, in the order these questions actually come up in the office. The row is here now because an evidence index with twenty honest lines is more use than one with four essays and nothing else.
What this is based on
- Hughes et al., sunscreen and prevention of skin aging — randomized trialAnnals of Internal Medicine · 2013
- Iannacone, Hughes & Green, effects of sunscreen on skin cancer and photoaging — review of the randomized evidencePhotodermatology, Photoimmunology & Photomedicine · 2014
Grades describe the quality of the human evidence, not my opinion of the treatment. Where the literature changes, the grade changes and the review date moves with it.
The full guide
All guides →Botox Timing: Starting, Spacing, and What “Preventative” Really Buys You →
When to start, how often to repeat, and what the word preventative is actually describing. The mechanism is well understood; most of the confusion is about scheduling, and most of the marketing is about starting earlier.
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What changed in facial rejuvenation this week, one guide we updated, and why it matters. Written by Jay Keni, MD.