{"title":"Randhawa 2016 — Daily Use of a Facial Broad Spectrum Sunscreen Significantly Improves Photoaging","entity_type":"Source","slug":"randhawa-2016-daily-sunscreen-photoaging","canonical_url":"https://skinknowledgebase.com/sources/randhawa-2016-daily-sunscreen-photoaging","dates":{"date_modified":"2026-05-09","date_reviewed":"2026-05-09"},"mcp_eligible":true,"evidence_sources":[],"product_fact_sources":[],"related_entities":[{"title":"EltaMD UV Clear Broad-Spectrum SPF 46","url":"https://skinknowledgebase.com/products/eltamd-uv-clear-spf-46"},{"title":"Zinc Oxide","url":"https://skinknowledgebase.com/ingredients/zinc-oxide"},{"title":"Sun Damage","url":"https://skinknowledgebase.com/concerns/sun-damage"},{"title":"Does sunscreen actually prevent wrinkles?","url":"https://skinknowledgebase.com/questions/does-sunscreen-actually-prevent-wrinkles"},{"title":"What SPF should I use every day?","url":"https://skinknowledgebase.com/questions/what-spf-should-i-use-every-day"}],"body_sections":[{"heading":"Quick Summary","paragraphs":["A 52-week prospective clinical trial published in Dermatologic Surgery in 2016 that evaluated daily use of a facial broad-spectrum SPF 30 sunscreen against photoaging endpoints. It is one of the strongest pieces of facial-specific clinical evidence directly tying daily broad-spectrum SPF use to the appearance of photoaging."]},{"heading":"What Studied","paragraphs":["The single-center prospective study followed 32 subjects, ages 40 to 55, using a daily facial broad-spectrum SPF 30 product for 52 weeks. Investigators evaluated photoaging via standardized clinical grading and instrumental measurements (skin texture, tone, clarity) at multiple intervals across the year-long study."]},{"heading":"Main Findings","paragraphs":["Daily use of the facial broad-spectrum SPF 30 sunscreen produced statistically significant improvement in clinical photoaging measures across nearly every endpoint by the 52-week mark, including evenness of skin tone, skin clarity, mottled pigmentation, and texture. The result was framed by the authors as direct evidence that daily broad-spectrum SPF use can visibly improve — not merely hold steady — clinical signs of photoaging in adults."]},{"heading":"Why It Matters","paragraphs":["For a daily-SPF Question scoped to cosmetic-appearance, Randhawa 2016 is the cleanest facial-specific anchor for the visible-improvement framing. Hughes 2013 supports the \"slowed accumulation\" case; Randhawa 2016 supports the additional \"measurable improvement over a year\" case. Together they are the page's strongest pair of peer-reviewed appearance-of-photoaging citations."]}],"source_type":"peer_reviewed","original_source_url":"https://pubmed.ncbi.nlm.nih.gov/27749441/"}