The Art of Being Well SPF Myths, Sunscreen Controversies, Red Light & Why Freckles Are a Warning Sign | Dr. Dennis Gross
May 11, 2026
Dr. Dennis Gross, board-certified dermatologist and skincare founder, explains what your skin signals about past sun damage and cancer risk. He unpacks SPF labeling, physical vs chemical sunscreens, the SPF layering myth, LED light therapy and why FDA clearance matters. They also cover mole checks, freckles as warning signs, exfoliation routines, collagen-building tools, and the future of at-home skincare tech.
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Never Burn And Monitor Vitamin D
- Never get a sunburn; even one sunburn increases lifetime skin cancer risk and parents should protect children rigorously.
- Wear enough sunscreen to avoid redness, use protective clothing, and get vitamin D checked rather than seeking sun exposure as the primary source.
Pick A Sunscreen You Will Use
- Choose a sunscreen you actually like and will use consistently; Dr. Dennis Gross prefers mineral (zinc oxide/titanium dioxide) for sensitive skin.
- Apply sunscreen 10–20 minutes before going outside so it can work properly.
Reapply Often Especially After Water Or Sweat
- Reapply sunscreen after heavy sweating, towel drying, swimming, or about every four hours even without obvious perspiration.
- Treat 'waterproof' claims cautiously; no product is 100% foolproof once submerged or wiped.