What does the % DHA mean when describing Spray Tanning

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The active ingredient DHA develops on the skin after about 5 hours. How dark the colour will develop will depend on the % of DHA in the solution used. Spray tanning solutions can range from 6% DHA for very fair skins to 16% DHA for people who like an extremely dark tan. 8% - 10% are the most used % for fair skinned type people.

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