WASHINGTON -- Government regulators are warning that consumers should take care when going to spray-on tanning booths.

TANNING FDA Information On Sunless Tanning And Other Tanning-Related Topics

The sunless salons are a popular alternative to lying in the sun or going to traditional tanning booths, both of which expose the skin to potentially harmful ultraviolet rays. But officials said the tanning spray might not be entirely safe.

Spray tanning systems use solutions containing DHA, a type of dye used in over-the-counter sunless tanning creams. The Food and Drug Administration has approved DHA for external use on the skin, but experts say questions remain about its use in spray tanning.

"Because some of the products may get exposed to the eyes, to the nose, mucous membranes, and may be inhaled," said Dr. Linda Katz, of the FDA.

And DHA is NOT approved for inhalation or use around the eyes. Manufacturers of some spray systems say they are aware of the warning.

"We have been telling people all along they should close their eyes, and hold their breath," Mystic Tan chief executive operator Troy Cooper said.

The FDA and Cooper said consumers should request protective measures, such as nose plugs, goggles and lip balm. The FDA said all that won't necessarily make spray tanning safe, but consumers should be informed of possible risks.

"So that they can make choices and they can make good choices," Katz said.

Katz said federal regulators haven't received enough information to evaluate the safety of DHA in spray tanning. But she said DHA in its approved use on the skin is relatively safe.

Spray-on tans last about three to five days, depending on how often a shower is taken. The color is usually gone by the fifth or sixth day.