Sunless tanning pills, which typically contain the color additive canthaxanthin, aren't safe. When taken in large amounts, canthaxanthin can turn your skin orange or brown and cause hives, liver damage and impaired vision.
How much solution do you use per spray tan?
The standard application range is 2-4 ounces of solution per client. Most vendors quote 2 ounces per client, but those with darker or oiler complexions will likely need more.