What is Oxybenzone?
Oxybenzone is a synthetic organic compound in the benzophenone family, produced through chemical synthesis rather than derived from any natural source. It works by absorbing ultraviolet energy and converting it to a small amount of heat, preventing that radiation from reaching the skin. It has been used in sunscreen formulations for several decades.
What does it do in the product?
In a sunscreen product, oxybenzone absorbs both UVB rays and a portion of UVA rays, providing broad-spectrum protection that helps prevent sunburn and UV-related skin damage. It is often combined with other UV filters to fill coverage gaps across the UV spectrum. Its oil-soluble nature also makes it useful for helping other active ingredients disperse evenly in a formula.
Where you usually find it
- Chemical sunscreen lotions and creams
- SPF-rated lip balms
- Tinted moisturisers with sun protection
- Spray sunscreens
- After-sun and daily-wear body lotions with SPF
Is Oxybenzone something to worry about?
Regulatory and scientific attention has grown around oxybenzone because studies show it can be absorbed through the skin and detected in blood, urine, and breast milk, though whether those absorbed levels cause harm in humans remains an open question. Animal studies at high doses have suggested hormonal disruption, but regulators have not reached consensus on whether typical sunscreen use poses a meaningful risk to human health. Separately, environmental research has linked oxybenzone to damage in coral reef ecosystems, leading some jurisdictions to restrict or ban it in reef-adjacent areas.
Who should pay attention
- People with known benzophenone allergies or photoallergies, as reactions are documented
- Infants and young children, given higher skin-surface-to-body-weight ratios and developing endocrine systems
- Pregnant or breastfeeding individuals who prefer to limit systemic absorption of any substance
- Those swimming in protected marine areas where reef-safe sunscreen rules may apply
- Anyone with sensitive skin prone to contact dermatitis
How is it regulated?
In the United States, oxybenzone is regulated as an over-the-counter sunscreen active ingredient, but the FDA has indicated it needs more safety data before it can be confirmed as generally recognised as safe and effective under updated monograph rules. In the European Union, it is permitted as a UV filter at a set maximum concentration, though EFSA and member-state bodies have periodically reviewed its endocrine-disrupting potential. Several US states and a number of international coastal jurisdictions have restricted or banned its sale specifically to protect coral reef environments.
How to spot it on a label
On a sunscreen label, oxybenzone appears in the active ingredients section rather than the inactive list, usually listed as 'Oxybenzone' or 'Benzophenone-3'. The percentage concentration must be declared on regulated sunscreen products, so you can compare formulations directly. If a product is marketed as 'reef-safe' or 'reef-friendly', the absence of oxybenzone is typically one of the defining criteria.
What a cleaner swap looks like
Mineral sunscreens using zinc oxide or titanium dioxide as the sole active ingredients are the most common lower-concern alternatives, as these ingredients sit on the skin surface rather than being absorbed systemically. Among chemical filters, avobenzone combined with stabilisers, or newer filters such as Tinosorb S and Tinosorb M (approved in the EU but not currently in the US OTC monograph), are used in markets where they are permitted. InZoRAH can flag products in your scanned category that rely on mineral-only or alternative chemical UV systems.