A DHA spray tan can color the surface of your skin, but that does not mean every kind of exposure has been shown to be safe. Regulators distinguish applying DHA to external skin from inhaling the mist or getting it in your eyes, lips, nose, or other mucous membranes. A spray tan also does not protect you from UV rays or sunburn.
What DHA spray tan safety rules actually cover
Dihydroxyacetone (DHA) is a color additive that reacts with substances in the outer layer of skin to create a tanned appearance. In the United States, the FDA permits DHA for coloring the body by external application. That permission does not cover the lips, mucous membranes, or the area of the eye, and it is not approval of DHA as an all-over mist in a spray booth.
The FDA says safety data have not been submitted to support exposure through inhalation, misting, or contact with those sensitive areas. This means the risks for those routes are unknown—not that harm from a single exposure has been proven. The distinction matters: evidence about a lotion applied to external skin cannot automatically settle questions about breathing in fine spray or getting it on moist tissues.
Rules and oversight can differ by country. In the EU, a 2010 assessment by the European Commission’s Scientific Committee on Consumer Safety concluded that DHA in skin formulations at concentrations up to 10% would not pose a health risk to consumers. That conclusion concerns topical formulations; it does not establish the safety of inhaling spray or exposing eyes and mucous membranes. In the US, the FDA describes booth misting as an unapproved use, and local or state authorities generally oversee salon practices.
Skin application is not the same as inhalation
Ordinary creams and lotions are easier to keep on external skin and away from the eyes, nose, and mouth. A booth spray can travel beyond the intended area, which is why the FDA advises consumers to prevent inhalation and shield the eyes, lips, and mucous membranes. The agency’s caution reflects missing safety data for these routes, rather than a quantified risk estimate for a typical appointment.
Laboratory findings add a reason for care, but not a direct estimate of what happens to salon customers. In a 2017 study, Kelly R. Smith and colleagues exposed A375P human melanoma cells in a lab to DHA. They observed oxidative stress, cell-cycle arrest, and cell death. Those were results in a selected cell model—not in people receiving spray tans—and cannot show that a spray tan causes melanoma or the same effects in human skin. They do underline why cell experiments should not be mistaken for proof that every exposure route is harmless.
If you prefer to avoid aerosol exposure, a lotion or cream may make it easier to control where DHA goes. For more on how those products differ, read our guide to self-tanner safety and application.
What to ask before using a spray booth
Before booking, ask the salon how it protects customers from breathing in the mist and from spray reaching the eyes, lips, nose, or other mucous membranes. The FDA advises asking about protections and choosing another facility if the answers leave you unprotected. Follow the booth’s instructions, use the eye and mucous-membrane protection provided, and do not deliberately inhale the spray. If the facility cannot explain how it limits these exposures, consider skipping the spray service.
At home, follow the product label and keep DHA away from your eyes, nose, and mouth. A lotion or cream does not remove the need for care, but it avoids the same all-over spray cloud.
A spray tan is not sunscreen
DHA changes skin color; it does not block UV radiation. A darker-looking tan is not a reliable sign of sun protection and cannot prevent sunburn. Some products may contain a separate sunscreen ingredient, but only rely on sun protection when the product is labeled with an SPF. Apply sunscreen as directed and use other sun-protective measures, whether or not you have a spray tan.
If you have concerns after a significant exposure, or develop symptoms after a spray tan, contact a healthcare professional. The main takeaway is to treat external skin application and spray exposure to your breathing passages or sensitive tissues as different situations—and to keep sun protection separate from cosmetic tanning.